Document 2.8 vs 3.5 hardware differences in README.

Link CYD_PROJECT_GUIDE section A for expansion pins and touch/backlight.
Link CYD_PROJECT_GUIDE for 3.5" touch/backlight/LVGL pitfalls.
2026-10-25 10:40:26 +08:00 · 2026-10-25 10:38:37 +08:00 · 2026-10-25 10:34:00 +08:00 · 2026-10-25 10:30:24 +08:00 · 2026-10-23 16:24:19 +08:00 · 2026-10-19 22:14:21 +08:00
27 changed files with 1065 additions and 117 deletions
--- a/README.md
+++ b/README.md
@@ -1,24 +1,27 @@
 # CYD 温湿度仪表盘

-ESP32 Cheap Yellow Display（ESP32-2432S028R）+ DHT11 + LVGL 温湿度仪表盘。
+ESP32 Cheap Yellow Display（默认 2.8" ESP32-2432S028R；可选 3.5" `cyd_35r`）+ DHT11 + LVGL 温湿度仪表盘。
+
+跨板对照与避坑：上级目录 [`../CYD_PROJECT_GUIDE.md`](../CYD_PROJECT_GUIDE.md) **§A**（2.8 vs 3.5：触控 / 背光 / 外设脚）。

 ## 硬件

-| 项目 | 说明 |
-|------|------|
-| 板子 | CYD ESP32-2432S028R（2.8" ILI9341） |
-| 传感器 | DHT11 |
-| DATA | **GPIO22**（CN1 / P3） |
-| 供电 | USB 5V；电池需外接充电管理（板载 JST 多为供电口） |
+| 项目 | 2.8"（默认 `cyd_28r`） | 3.5C（`cyd_35r`） |
+|------|------------------------|-------------------|
+| 板子 | ESP32-2432S028R · ILI9341 | ESP32-3248S035C · ST7796 |
+| 触控 | XPT2046 SoftSPI | GT911 I2C |
+| 背光 | GPIO21 | GPIO27 |
+| DHT11 DATA | **GPIO22**（CN1 空闲脚之一；2.8 另一常用空闲脚为 **27**） | **GPIO22**（3.5 上 27=背光，勿接 DHT） |
+| 供电 | USB 5V | 同左 |

-接线：`VCC→3.3V`，`GND→GND`，`DATA→GPIO22`。
+接线（两板 DHT）：`VCC→3.3V`，`GND→GND`，`DATA→GPIO22`。

 ## 功能

- 横屏温湿度圆弧仪表 + 数字读数
- EMA 平滑、min/max、舒适度、体感温度 / 露点
- 温湿度趋势折线
- 点按屏幕切换背光亮度（4 档）
+- 横屏网格布局：双圆弧仪表 + 底部左信息 / 右趋势图（分区不重叠）
+- EMA 平滑、min/max、舒适度条、体感 / 露点分行显示
+- 圆弧与舒适度条缓动动画；趋势折线 SHIFT 更新
+- 短按切换背光（4 档，顶部提示）；长按 ≥0.7s 重置 min/max
 - 偶发 DHT 读失败容错（连续失败才报错）
 - 常亮运行（无自动熄屏 / 休眠）

@@ -31,6 +34,18 @@ pio run -e cyd_28r -t upload
 pio device monitor -b 115200
 ```

+### 预编译固件（随时刷，不必编译）
+
+已归档到 [`firmware/cyd_28r/`](firmware/cyd_28r/)（含 bootloader / partitions / app）：
+
+```powershell
+cd firmware\cyd_28r
+.\flash.ps1
+# 或 .\flash.ps1 -Port COM3
+```
+
+说明见 [`firmware/README.md`](firmware/README.md)。源码更新后重新打包：`.\firmware\export_from_build.ps1`。
+
 ### 环境选择

 | 环境 | 适用 |
@@ -38,6 +53,7 @@ pio device monitor -b 115200
 | `cyd_28r` | 标准 ILI9341 CYD（默认） |
 | `cyd_28r_inv` | 颜色反相 / 发白 |
 | `cyd_28_st7789` | USB-C 双口 / ST7789 变体 |
+| `cyd_35r` | 3.5" ESP32-3248S035（ST7796 + GT911） |

 ## 3D 外壳

@@ -66,6 +82,7 @@ platformio.ini                 # 板级与库依赖
 include/lv_conf.h              # LVGL 配置
 src/main.cpp                   # 仪表盘主程序
 scripts/exclude_lvgl_asm.py    # 排除 ESP32 不兼容的 LVGL ASM
+firmware/                      # 预编译固件（可离线刷写）
 cad/                           # 3D 外壳（OpenSCAD + STL）
 .cursor/rules/                 # Cursor 协作规则
 README.md                      # 本文档
@@ -82,21 +99,28 @@ README.md                      # 本文档

 ## 稳定版快照（可随时切回）

-当前保留的外壳/预览稳定版标签：**`v1.0-case-closed`**  
-（提交 `646cf45`：后盖平面 DHT 卡位微突出 + 前后盖止口合盖，无旁侧多余格子）
+| 标签 | 提交 | 内容 |
+|------|------|------|
+| **`v1.1-case-snaps`**（当前推荐） | `892e9d0` | 圆角 R3.5、四侧悬臂卡扣、定位柱、后盖 DHT 卡位、`snap_coupon` |
+| `v1.0-case-closed` | `646cf45` | 仅止口合盖 + DHT 后盖微突出，无卡扣、无旁侧格子 |
+
+本地分支备份：`keep/v1.1-case-snaps`、`keep/v1.0-case-closed`。

 ```bash
 # 查看标签
 git tag -l

-# 临时查看该版（只读）
-git switch --detach v1.0-case-closed
+# 临时查看当前稳定版（只读）
+git switch --detach v1.1-case-snaps

 # 基于该版开新分支继续改
-git switch -c restore/v1.0-case-closed v1.0-case-closed
+git switch -c restore/v1.1-case-snaps v1.1-case-snaps

-# 整库硬切回该版（会丢弃之后未提交改动，慎用）
-git reset --hard v1.0-case-closed
+# 切回旧无卡扣版
+git switch --detach v1.0-case-closed
+
+# 整库硬切回（会丢弃之后未提交改动，慎用）
+git reset --hard v1.1-case-snaps
 ```

 ## 变更记录
@@ -113,3 +137,10 @@ git reset --hard v1.0-case-closed
 | 2026-10-17 | 去掉旁侧多余凸块；修复合盖对齐；DHT 改为后盖平面卡位 |
 | 2026-10-17 | 打标签 `v1.0-case-closed` 作为可回滚稳定版 |
 | 2026-10-17 | 外壳 v1.1：外圆角 R3.5、四侧悬臂卡扣、定位柱、卡扣试打样件 |
+| 2026-10-17 | 打标签 `v1.1-case-snaps`（及分支 `keep/v1.1-case-snaps`）作为可回滚稳定版 |
+| 2026-10-17 | UI 重排：修文字压图表；表盘/底栏分区；动画与短按/长按交互 |
+| 2026-10-17 | 顶栏改单行，避免 up 文案被表盘面板盖住 |
+| 2026-10-17 | 归档预编译固件到 `firmware/cyd_28r/`，附一键刷写脚本 |
+| 2026-10-25 | 3.5" 表盘读数：数值+单位整体居中，数值变宽后不再盖住单位 |
+| 2026-10-25 | 修复 3.5" 黑屏：背光改回 GPIO27（GPIO21 为 GT911 INT） |
+| 2026-10-25 | README 链到上级 `CYD_PROJECT_GUIDE.md` §A（2.8/3.5 对照） |
--- a/cad/README.md
+++ b/cad/README.md
@@ -33,7 +33,7 @@
 前框止口落入后盖槽，卡扣钩入后盖窗口卡台；预览默认合盖（开合度 0%）。  
 对齐数据在 `export/mate.json`（`version: 1.1-snaps`）。

-稳定旧版（无卡扣、仅止口）标签：仓库根 README 的 `v1.0-case-closed`。
+稳定标签：当前 **`v1.1-case-snaps`**；旧无卡扣版 **`v1.0-case-closed`**（见仓库根 README）。

 ## 浏览器预览

--- a/cad/viewer.html
+++ b/cad/viewer.html
@@ -63,7 +63,7 @@

    <p class="faq">
      v1.1：外轮廓圆角 + 长边四侧悬臂卡扣合盖；后盖中心微凸是 <b>DHT11 卡位通风口</b>。<br/>
-      已去掉旁边多余的大“格子”。旧无卡扣版见标签 <code>v1.0-case-closed</code>。
+      已去掉旁边多余的大“格子”。稳定版标签 <code>v1.1-case-snaps</code>；旧无卡扣版 <code>v1.0-case-closed</code>。
    </p>
    <div id="status">加载中…</div>
  </div>
--- a/firmware/README.md
+++ b/firmware/README.md
@@ -0,0 +1,50 @@
+# 预编译固件（可随时刷写）
+
+| 目录 | 板子 |
+|------|------|
+| [`cyd_28r/`](cyd_28r/) | CYD ESP32-2432S028R（2.8" ILI9341），DHT11 → GPIO22 |
+| [`cyd_35r/`](cyd_35r/) | CYD ESP32-3248S035（3.5" ST7796 + GT911），DHT11 → GPIO22 |
+
+版本信息见各目录 `VERSION.txt`。
+
+## 直接刷写（无需重新编译）
+
+1. USB 连接板子  
+2. 进入对应目录执行：
+
+```powershell
+cd firmware\cyd_28r   # 或 cyd_35r
+.\flash.ps1
+# 或指定端口
+.\flash.ps1 -Port COM3
+```
+
+也可双击 / 运行 `flash.bat`。
+
+依赖其一即可：
+
+- 已安装 PlatformIO（`pio`，自带 esptool）
+- 或 `pip install esptool`
+
+## 手动 esptool
+
+```bash
+esptool.py --chip esp32 --port COM3 --baud 921600 write_flash -z ^
+  --flash_mode dio --flash_freq 40m --flash_size 4MB ^
+  0x1000 bootloader.bin ^
+  0x8000 partitions.bin ^
+  0xe000 boot_app0.bin ^
+  0x10000 firmware.bin
+```
+
+## 从源码重新打包进本目录
+
+在仓库根目录：
+
+```powershell
+.\firmware\export_from_build.ps1
+.\firmware\export_from_build.ps1 -Env cyd_35r
+# 仅复制、不编译：
+.\firmware\export_from_build.ps1 -SkipBuild
+.\firmware\export_from_build.ps1 -Env cyd_35r -SkipBuild
+```
--- a/firmware/cyd_28r/VERSION.txt
+++ b/firmware/cyd_28r/VERSION.txt
@@ -0,0 +1,16 @@
+name: CYD climate dashboard (cyd_28r)
+git: 3173b5f
+date: 2026-10-17
+board: ESP32-2432S028R (ILI9341)
+dht: GPIO22
+flash_size: 4MB
+offsets:
+  0x1000  bootloader.bin
+  0x8000  partitions.bin
+  0xe000  boot_app0.bin
+  0x10000 firmware.bin
+sha256:
+  bootloader.bin  3D234A7471F67B013686DABD4DEE7C1FA915C9928463616A94BC9297ACF1ABF8
+  partitions.bin  0A8B5720E7B77FF11F1462458C3A509DEE79224E5279898F26D6A2E3AE0517B7
+  boot_app0.bin   F94C5D786A7A8FAB06AC5D10E33BF37711A6697636DC037559EA19CC410A17F0
+  firmware.bin    136CDB0949D3B74DF14ACBB8A2ED100C6F6934BEBE6290639E9C4CD1E68582F4
--- a/firmware/cyd_28r/boot_app0.bin
+++ b/firmware/cyd_28r/boot_app0.bin
--- a/firmware/cyd_28r/bootloader.bin
+++ b/firmware/cyd_28r/bootloader.bin
--- a/firmware/cyd_28r/firmware.bin
+++ b/firmware/cyd_28r/firmware.bin
--- a/firmware/cyd_28r/flash.bat
+++ b/firmware/cyd_28r/flash.bat
@@ -0,0 +1,5 @@
+@echo off
+setlocal
+cd /d "%~dp0"
+powershell -NoProfile -ExecutionPolicy Bypass -File "%~dp0flash.ps1" %*
+exit /b %ERRORLEVEL%
--- a/firmware/cyd_28r/flash.ps1
+++ b/firmware/cyd_28r/flash.ps1
@@ -0,0 +1,84 @@
+# Flash archived CYD climate firmware (no rebuild needed)
+# Usage:
+#   .\flash.ps1
+#   .\flash.ps1 -Port COM5
+#   .\flash.ps1 -Port COM5 -Baud 460800
+
+param(
+  [string]$Port = "",
+  [int]$Baud = 921600
+)
+
+$ErrorActionPreference = "Stop"
+$here = Split-Path -Parent $MyInvocation.MyCommand.Path
+Set-Location $here
+
+function Find-Esptool {
+  $pio = Get-Command pio -ErrorAction SilentlyContinue
+  if ($pio) {
+    $pkg = Join-Path $env:USERPROFILE ".platformio\packages\tool-esptoolpy\esptool.py"
+    if (Test-Path $pkg) { return @{ Kind = "py"; Path = $pkg } }
+  }
+  $py = Get-Command python -ErrorAction SilentlyContinue
+  if ($py) {
+    try {
+      & python -c "import esptool" 2>$null
+      if ($LASTEXITCODE -eq 0) { return @{ Kind = "mod"; Path = "esptool" } }
+    } catch {}
+  }
+  $esp = Get-Command esptool.py -ErrorAction SilentlyContinue
+  if ($esp) { return @{ Kind = "py"; Path = $esp.Source } }
+  return $null
+}
+
+if (-not $Port) {
+  $ports = @()
+  try {
+    Add-Type -AssemblyName System.IO.Ports -ErrorAction SilentlyContinue | Out-Null
+    $ports = [System.IO.Ports.SerialPort]::GetPortNames() | Sort-Object
+  } catch {}
+  if (-not $ports -or $ports.Count -eq 0) {
+    $ports = Get-CimInstance Win32_SerialPort -ErrorAction SilentlyContinue |
+      Select-Object -ExpandProperty DeviceID | Sort-Object
+  }
+  if (-not $ports -or $ports.Count -eq 0) {
+    Write-Error "No serial ports found. Plug in the CYD USB cable, then retry with -Port COMx"
+  }
+  if ($ports.Count -eq 1) {
+    $Port = $ports[0]
+  } else {
+    Write-Host "Available ports: $($ports -join ', ')"
+    $Port = $ports[-1]
+    Write-Host "Using last port: $Port (override with -Port)"
+  }
+}
+
+$tool = Find-Esptool
+if (-not $tool) {
+  Write-Error "esptool not found. Install PlatformIO (`pio`) or: pip install esptool"
+}
+
+$argsCommon = @(
+  "--chip", "esp32",
+  "--port", $Port,
+  "--baud", "$Baud",
+  "--before", "default_reset",
+  "--after", "hard_reset",
+  "write_flash", "-z",
+  "--flash_mode", "dio",
+  "--flash_freq", "40m",
+  "--flash_size", "4MB",
+  "0x1000", "bootloader.bin",
+  "0x8000", "partitions.bin",
+  "0xe000", "boot_app0.bin",
+  "0x10000", "firmware.bin"
+)
+
+Write-Host "Flashing $here -> $Port @ $Baud"
+if ($tool.Kind -eq "mod") {
+  & python -m esptool @argsCommon
+} else {
+  & python $tool.Path @argsCommon
+}
+if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
+Write-Host "Done. Open serial monitor at 115200 if needed."
--- a/firmware/cyd_28r/media/preview.html
+++ b/firmware/cyd_28r/media/preview.html
@@ -0,0 +1,74 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="utf-8" />
+<meta name="viewport" content="width=320" />
+<title>CLIMATE</title>
+<style>
+  *{box-sizing:border-box;margin:0;padding:0}
+  html,body{width:320px;height:240px;overflow:hidden;background:#000;margin:0}
+  .bezel{width:320px;height:240px;background:#1a1408}
+  .screen{
+    width:320px;height:240px;background:#0A1018;color:#F2F5FA;
+    font:12px/1.2 system-ui,sans-serif;position:relative;overflow:hidden;
+  }
+  .hdr{display:flex;align-items:center;gap:8px;padding:4px 8px;height:24px}
+  .hdr b{font-size:14px;font-weight:700}
+  .hdr .up{color:#7E90A8}
+  .hdr .sp{margin-left:auto;display:flex;align-items:center;gap:6px;color:#7E90A8}
+  .led{width:9px;height:9px;border-radius:50%;background:#4CAF7A}
+  .row{display:flex;gap:6px;padding:0 8px}
+  .panel{
+    flex:1;height:118px;background:#121C2A;border:1px solid #1E2C40;
+    border-radius:6px;padding:6px 8px;position:relative;
+  }
+  .cap{color:#7E90A8;font-size:11px}
+  .gauge{
+    width:90px;height:90px;margin:4px auto 0;border-radius:50%;
+    background:conic-gradient(#3DBF8C 0 70%, #243247 0);
+    mask:radial-gradient(farthest-side,transparent 62%,#000 63%);
+    -webkit-mask:radial-gradient(farthest-side,transparent 62%,#000 63%);
+  }
+  .panel.hum .gauge{background:conic-gradient(#3DB8A8 0 55%, #243247 0)}
+  .val{position:absolute;left:0;right:0;top:48px;text-align:center;font-size:24px;font-weight:700}
+  .panel.hum .val{color:#3DB8A8}
+  .panel.temp .val{color:#3DBF8C}
+  .unit{font-size:11px;color:#7E90A8;font-weight:500}
+  .rng{position:absolute;left:0;right:0;bottom:6px;text-align:center;color:#7E90A8;font-size:11px}
+  .bot{
+    margin:6px 8px 0;height:78px;background:#121C2A;border:1px solid #1E2C40;
+    border-radius:6px;display:flex;gap:8px;padding:8px;
+  }
+  .info{width:88px}
+  .ok{color:#E6B84D;font-size:14px;font-weight:700}
+  .bar{margin-top:8px;height:8px;background:#243247;border-radius:4px;overflow:hidden}
+  .bar>i{display:block;height:100%;width:62%;background:#E6B84D}
+  .meta{margin-top:10px;color:#7E90A8;font-size:11px}
+  .chart{flex:1;background:#0E1622;border-radius:4px;position:relative;overflow:hidden}
+  .chart svg{width:100%;height:100%}
+</style>
+</head>
+<body>
+<div class="bezel"><div class="screen" id="s">
+  <div class="hdr"><b>CLIMATE</b><span class="up">up 01:24</span>
+    <span class="sp"><span>OK</span><span class="led"></span></span></div>
+  <div class="row">
+    <div class="panel temp"><div class="cap">TEMP</div><div class="gauge"></div>
+      <div class="val">24.6<span class="unit">C</span></div><div class="rng">22.1 / 26.0</div></div>
+    <div class="panel hum"><div class="cap">HUM</div><div class="gauge"></div>
+      <div class="val">48<span class="unit">%</span></div><div class="rng">41 / 55</div></div>
+  </div>
+  <div class="bot">
+    <div class="info"><div class="ok">COMFORT</div><div class="bar"><i></i></div>
+      <div class="meta">DHT11 · GPIO22</div></div>
+    <div class="chart"><svg viewBox="0 0 180 60" preserveAspectRatio="none">
+      <polyline fill="none" stroke="#3DBF8C" stroke-width="2"
+        points="0,40 20,35 40,38 60,28 80,30 100,22 120,26 140,18 160,24 180,20"/>
+      <polyline fill="none" stroke="#3DB8A8" stroke-width="2"
+        points="0,45 20,42 40,44 60,40 80,38 100,36 120,39 140,34 160,37 180,35"/>
+    </svg></div>
+  </div>
+</div></div>
+
+</body>
+</html>
--- a/firmware/cyd_28r/meta.json
+++ b/firmware/cyd_28r/meta.json
@@ -0,0 +1,10 @@
+{
+  "boardId": "esp32-2432s028",
+  "name": "CYD climate dashboard",
+  "summary": "Temperature & humidity gauges with comfort bar and chart",
+  "description": "DHT11 on GPIO22. Dual arcs for TEMP/HUM, comfort status, live sparkline.",
+  "tags": ["climate", "dht11", "gauge"],
+  "media": {
+    "preview": "media/preview.html"
+  }
+}
--- a/firmware/cyd_28r/partitions.bin
+++ b/firmware/cyd_28r/partitions.bin
--- a/firmware/cyd_35r/VERSION.txt
+++ b/firmware/cyd_35r/VERSION.txt
@@ -0,0 +1,11 @@
+name: CYD temperature (cyd_35r)
+git: 0a1b612
+date: 2026-10-25
+board: ESP32-3248S035 (ST7796 + GT911)
+flash_size: 4MB
+offsets:
+  0x1000  bootloader.bin
+  0x8000  partitions.bin
+  0xe000  boot_app0.bin
+  0x10000 firmware.bin
+note: TFT_BL=GPIO27
--- a/firmware/cyd_35r/boot_app0.bin
+++ b/firmware/cyd_35r/boot_app0.bin
--- a/firmware/cyd_35r/bootloader.bin
+++ b/firmware/cyd_35r/bootloader.bin
--- a/firmware/cyd_35r/firmware.bin
+++ b/firmware/cyd_35r/firmware.bin
--- a/firmware/cyd_35r/flash.bat
+++ b/firmware/cyd_35r/flash.bat
@@ -0,0 +1,5 @@
+@echo off
+setlocal
+cd /d "%~dp0"
+powershell -NoProfile -ExecutionPolicy Bypass -File "%~dp0flash.ps1" %*
+exit /b %ERRORLEVEL%
--- a/firmware/cyd_35r/flash.ps1
+++ b/firmware/cyd_35r/flash.ps1
@@ -0,0 +1,84 @@
+# Flash archived CYD climate firmware (no rebuild needed)
+# Usage:
+#   .\flash.ps1
+#   .\flash.ps1 -Port COM5
+#   .\flash.ps1 -Port COM5 -Baud 460800
+
+param(
+  [string]$Port = "",
+  [int]$Baud = 921600
+)
+
+$ErrorActionPreference = "Stop"
+$here = Split-Path -Parent $MyInvocation.MyCommand.Path
+Set-Location $here
+
+function Find-Esptool {
+  $pio = Get-Command pio -ErrorAction SilentlyContinue
+  if ($pio) {
+    $pkg = Join-Path $env:USERPROFILE ".platformio\packages\tool-esptoolpy\esptool.py"
+    if (Test-Path $pkg) { return @{ Kind = "py"; Path = $pkg } }
+  }
+  $py = Get-Command python -ErrorAction SilentlyContinue
+  if ($py) {
+    try {
+      & python -c "import esptool" 2>$null
+      if ($LASTEXITCODE -eq 0) { return @{ Kind = "mod"; Path = "esptool" } }
+    } catch {}
+  }
+  $esp = Get-Command esptool.py -ErrorAction SilentlyContinue
+  if ($esp) { return @{ Kind = "py"; Path = $esp.Source } }
+  return $null
+}
+
+if (-not $Port) {
+  $ports = @()
+  try {
+    Add-Type -AssemblyName System.IO.Ports -ErrorAction SilentlyContinue | Out-Null
+    $ports = [System.IO.Ports.SerialPort]::GetPortNames() | Sort-Object
+  } catch {}
+  if (-not $ports -or $ports.Count -eq 0) {
+    $ports = Get-CimInstance Win32_SerialPort -ErrorAction SilentlyContinue |
+      Select-Object -ExpandProperty DeviceID | Sort-Object
+  }
+  if (-not $ports -or $ports.Count -eq 0) {
+    Write-Error "No serial ports found. Plug in the CYD USB cable, then retry with -Port COMx"
+  }
+  if ($ports.Count -eq 1) {
+    $Port = $ports[0]
+  } else {
+    Write-Host "Available ports: $($ports -join ', ')"
+    $Port = $ports[-1]
+    Write-Host "Using last port: $Port (override with -Port)"
+  }
+}
+
+$tool = Find-Esptool
+if (-not $tool) {
+  Write-Error "esptool not found. Install PlatformIO (`pio`) or: pip install esptool"
+}
+
+$argsCommon = @(
+  "--chip", "esp32",
+  "--port", $Port,
+  "--baud", "$Baud",
+  "--before", "default_reset",
+  "--after", "hard_reset",
+  "write_flash", "-z",
+  "--flash_mode", "dio",
+  "--flash_freq", "40m",
+  "--flash_size", "4MB",
+  "0x1000", "bootloader.bin",
+  "0x8000", "partitions.bin",
+  "0xe000", "boot_app0.bin",
+  "0x10000", "firmware.bin"
+)
+
+Write-Host "Flashing $here -> $Port @ $Baud"
+if ($tool.Kind -eq "mod") {
+  & python -m esptool @argsCommon
+} else {
+  & python $tool.Path @argsCommon
+}
+if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
+Write-Host "Done. Open serial monitor at 115200 if needed."
--- a/firmware/cyd_35r/media/preview.html
+++ b/firmware/cyd_35r/media/preview.html
@@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="utf-8" />
+<meta name="viewport" content="width=320" />
+<title>CLIMATE</title>
+<style>
+  *{box-sizing:border-box;margin:0;padding:0}
+  html,body{width:320px;height:240px;overflow:hidden;background:#000;margin:0}
+  .bezel{width:320px;height:240px;background:#1a1408}
+  .screen{
+    width:320px;height:240px;background:#0A1018;color:#F2F5FA;
+    font:12px/1.2 system-ui,sans-serif;position:relative;overflow:hidden;
+  }
+  .hdr{display:flex;align-items:center;gap:8px;padding:4px 8px;height:24px}
+  .hdr b{font-size:14px;font-weight:700}
+  .hdr .up{color:#7E90A8}
+  .hdr .sp{margin-left:auto;display:flex;align-items:center;gap:6px;color:#7E90A8}
+  .led{width:9px;height:9px;border-radius:50%;background:#4CAF7A}
+  .row{display:flex;gap:6px;padding:0 8px}
+  .panel{
+    flex:1;height:118px;background:#121C2A;border:1px solid #1E2C40;
+    border-radius:6px;padding:6px 8px;position:relative;
+  }
+  .cap{color:#7E90A8;font-size:11px}
+  .gauge{
+    width:90px;height:90px;margin:4px auto 0;border-radius:50%;
+    background:conic-gradient(#3DBF8C 0 70%, #243247 0);
+    mask:radial-gradient(farthest-side,transparent 62%,#000 63%);
+    -webkit-mask:radial-gradient(farthest-side,transparent 62%,#000 63%);
+  }
+  .panel.hum .gauge{background:conic-gradient(#3DB8A8 0 55%, #243247 0)}
+  .val{position:absolute;left:0;right:0;top:48px;text-align:center;font-size:24px;font-weight:700}
+  .panel.hum .val{color:#3DB8A8}
+  .panel.temp .val{color:#3DBF8C}
+  .unit{font-size:11px;color:#7E90A8;font-weight:500}
+  .rng{position:absolute;left:0;right:0;bottom:6px;text-align:center;color:#7E90A8;font-size:11px}
+  .bot{
+    margin:6px 8px 0;height:78px;background:#121C2A;border:1px solid #1E2C40;
+    border-radius:6px;display:flex;gap:8px;padding:8px;
+  }
+  .info{width:88px}
+  .ok{color:#E6B84D;font-size:14px;font-weight:700}
+  .bar{margin-top:8px;height:8px;background:#243247;border-radius:4px;overflow:hidden}
+  .bar>i{display:block;height:100%;width:62%;background:#E6B84D}
+  .meta{margin-top:10px;color:#7E90A8;font-size:11px}
+  .chart{flex:1;background:#0E1622;border-radius:4px;position:relative;overflow:hidden}
+  .chart svg{width:100%;height:100%}
+
+/* CYD 3.5" full-bleed: non-uniform scale matches firmware UX()/UY(). */
+html,body{width:480px!important;height:320px!important;overflow:hidden!important;background:#000!important;margin:0!important;padding:0!important}
+.cyd35-scale{width:320px;height:240px;transform:scale(1.5,1.3333333333);transform-origin:0 0;overflow:hidden}
+</style>
+</head>
+<body>
+<div class="cyd35-scale">
+
+<div class="bezel"><div class="screen" id="s">
+  <div class="hdr"><b>CLIMATE</b><span class="up">up 01:24</span>
+    <span class="sp"><span>OK</span><span class="led"></span></span></div>
+  <div class="row">
+    <div class="panel temp"><div class="cap">TEMP</div><div class="gauge"></div>
+      <div class="val">24.6<span class="unit">C</span></div><div class="rng">22.1 / 26.0</div></div>
+    <div class="panel hum"><div class="cap">HUM</div><div class="gauge"></div>
+      <div class="val">48<span class="unit">%</span></div><div class="rng">41 / 55</div></div>
+  </div>
+  <div class="bot">
+    <div class="info"><div class="ok">COMFORT</div><div class="bar"><i></i></div>
+      <div class="meta">DHT11 · GPIO22</div></div>
+    <div class="chart"><svg viewBox="0 0 180 60" preserveAspectRatio="none">
+      <polyline fill="none" stroke="#3DBF8C" stroke-width="2"
+        points="0,40 20,35 40,38 60,28 80,30 100,22 120,26 140,18 160,24 180,20"/>
+      <polyline fill="none" stroke="#3DB8A8" stroke-width="2"
+        points="0,45 20,42 40,44 60,40 80,38 100,36 120,39 140,34 160,37 180,35"/>
+    </svg></div>
+  </div>
+</div></div>
+
+
+</div>
+</body>
+</html>
--- a/firmware/cyd_35r/meta.json
+++ b/firmware/cyd_35r/meta.json
@@ -0,0 +1,14 @@
+{
+  "boardId": "esp32-3248s035",
+  "name": "CYD climate dashboard (3.5\")",
+  "summary": "Temperature & humidity gauges with comfort bar and chart",
+  "description": "DHT11 on GPIO22. Dual arcs for TEMP/HUM, comfort status, live sparkline.",
+  "tags": [
+    "climate",
+    "dht11",
+    "gauge"
+  ],
+  "media": {
+    "preview": "media/preview.html"
+  }
+}
--- a/firmware/cyd_35r/partitions.bin
+++ b/firmware/cyd_35r/partitions.bin
--- a/firmware/export_from_build.ps1
+++ b/firmware/export_from_build.ps1
@@ -0,0 +1,87 @@
+# Export firmware bins from PlatformIO build.
+# Default: 2.8" (cyd_28r -> firmware/cyd_28r)
+# 3.5":    .\firmware\export_from_build.ps1 -Env cyd_35r
+#          (only after: pio run -e cyd_35r)
+
+param(
+  [switch]$SkipBuild,
+  [ValidateSet("cyd_28r", "cyd_35r")]
+  [string]$Env = "cyd_28r"
+)
+
+$ErrorActionPreference = "Stop"
+$root = Split-Path -Parent (Split-Path -Parent $MyInvocation.MyCommand.Path)
+Set-Location $root
+
+$env:Path = "C:\Users\dsx2016\AppData\Local\Programs\Python\Python312\Scripts;" + $env:Path
+
+if (-not $SkipBuild) {
+  pio run -e $Env
+  if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
+}
+
+$src = Join-Path $root (".pio\build\" + $Env)
+if ($Env -eq "cyd_35r") {
+  $dstName = "cyd_35r"
+  $boardLine = "board: ESP32-3248S035 (ST7796)"
+  $boardIdHint = "esp32-3248s035"
+} else {
+  $dstName = "cyd_28r"
+  $boardLine = "board: ESP32-2432S028R (ILI9341)"
+  $boardIdHint = "esp32-2432s028"
+}
+$dst = Join-Path $root ("firmware\" + $dstName)
+New-Item -ItemType Directory -Force -Path $dst | Out-Null
+
+foreach ($f in @("bootloader.bin", "partitions.bin", "firmware.bin")) {
+  $p = Join-Path $src $f
+  if (-not (Test-Path $p)) { Write-Error "Missing build artifact: $p — build with: pio run -e $Env" }
+  Copy-Item $p $dst -Force
+}
+
+$bootApp = Join-Path $env:USERPROFILE ".platformio\packages\framework-arduinoespressif32\tools\partitions\boot_app0.bin"
+if (-not (Test-Path $bootApp)) {
+  Write-Error "boot_app0.bin not found under PlatformIO packages"
+}
+Copy-Item $bootApp (Join-Path $dst "boot_app0.bin") -Force
+
+$git = ""
+try { $git = (git -C $root rev-parse --short HEAD).Trim() } catch { $git = "unknown" }
+$date = Get-Date -Format "yyyy-MM-dd"
+$hashes = Get-ChildItem (Join-Path $dst "*.bin") | Get-FileHash -Algorithm SHA256
+$lines = @(
+  "name: CYD temperature ($dstName)",
+  "git: $git",
+  "date: $date",
+  $boardLine,
+  "flash_size: 4MB",
+  "offsets:",
+  "  0x1000  bootloader.bin",
+  "  0x8000  partitions.bin",
+  "  0xe000  boot_app0.bin",
+  "  0x10000 firmware.bin",
+  "sha256:"
+)
+foreach ($h in $hashes) {
+  $lines += ("  {0,-15} {1}" -f (Split-Path $h.Path -Leaf), $h.Hash)
+}
+$lines | Set-Content -Encoding utf8 (Join-Path $dst "VERSION.txt")
+
+# Keep / refresh meta.json boardId for catalog filtering
+$metaPath = Join-Path $dst "meta.json"
+if (Test-Path $metaPath) {
+  try {
+    $meta = Get-Content $metaPath -Raw | ConvertFrom-Json
+    $meta.boardId = $boardIdHint
+    if ($Env -eq "cyd_35r" -and $meta.name -notmatch '3\.5') {
+      $meta.name = ($meta.name -replace '\s*$','') + ' (3.5")'
+    }
+    $meta | ConvertTo-Json -Depth 8 | Set-Content -Encoding utf8 $metaPath
+  } catch {
+    Write-Host "meta.json update skipped: $_"
+  }
+} elseif ($Env -eq "cyd_35r") {
+  Write-Host "Note: add firmware/cyd_35r/meta.json with boardId=$boardIdHint for the web catalog"
+}
+
+Write-Host "Exported -> $dst (env=$Env git=$git)"
--- a/include/touch.h
+++ b/include/touch.h
@@ -0,0 +1,6 @@
+#pragma once
+
+#include <lvgl.h>
+
+void touch_init();
+void touch_read_cb(lv_indev_t *indev, lv_indev_data_t *data);
--- a/platformio.ini
+++ b/platformio.ini
@@ -1,4 +1,4 @@
-; CYD ESP32-2432S028R — LVGL 温湿度仪表盘
+; CYD ESP32-2432S028R <EFBFBD>?LVGL 温湿度仪表盘
 ; DHT11 DATA -> GPIO22

 [platformio]
@@ -46,12 +46,12 @@ build_flags =
  -D LV_CONF_INCLUDE_SIMPLE=1
  -I include

-; 标准 CYD 2.8" 电阻屏 (ILI9341)
+; 标准 CYD 2.8" 电阻<EFBFBD>?(ILI9341)
 [env:cyd_28r]
 build_flags =
  ${env.build_flags}

-; 颜色反相版本（若画面色偏/发白可改用此环境）
+; 颜色反相版本（若画面色偏/发白可改用此环境<EFBFBD>?
 [env:cyd_28r_inv]
 build_flags =
  ${env.build_flags}
@@ -65,3 +65,29 @@ build_flags =
  -D ST7789_DRIVER=1
  -D TFT_RGB_ORDER=TFT_BGR
  -D TFT_INVERSION_ON=1
+
+; Optional 3.5" CYD ESP32-3248S035C (ST7796 + GT911 capacitive). Default remains cyd_28r.
+; Build: pio run -e cyd_35r
+; Keep TOUCH_CS=-1 — GPIO33 is GT911 SDA, not resistive touch CS.
+; TFT_BL=GPIO27 (not 21 — 21 is GT911 INT on C boards).
+[env:cyd_35r]
+lib_deps =
+  lvgl/lvgl@9.2.2
+  bodmer/TFT_eSPI@2.5.43
+  beegee-tokyo/DHT sensor library for ESPx@^1.19
+build_flags =
+  ${env.build_flags}
+  -UILI9341_2_DRIVER
+  -DST7796_DRIVER=1
+  -UTFT_WIDTH
+  -UTFT_HEIGHT
+  -DTFT_WIDTH=320
+  -DTFT_HEIGHT=480
+  -UTFT_BL
+  -DTFT_BL=27
+  -DCYD_BOARD_3248S035=1
+  -DSUPPORT_TRANSACTIONS
+  -DTFT_RGB_ORDER=TFT_BGR
+  -ULV_MEM_SIZE
+  -DLV_MEM_SIZE=32768
+
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,31 +1,65 @@
 /**
 * CYD ESP32-2432S028R — LVGL 温湿度仪表盘
 * DHT11 DATA -> GPIO22
+ * Backlight: 2.8" GPIO21, 3.5" GPIO27 (GT911 INT is GPIO21 — not BL)
 */

 #include <Arduino.h>
 #include <lvgl.h>
 #include <TFT_eSPI.h>
-#include <XPT2046_Touchscreen.h>
 #include <DHTesp.h>
 #include <math.h>
+#include "touch.h"

 #define DHT_PIN 22
+#if defined(CYD_BOARD_3248S035)
+#define TFT_BL_PIN 27
+#else
 #define TFT_BL_PIN 21
+#endif

-#define XPT2046_IRQ 36
-#define XPT2046_MOSI 32
-#define XPT2046_MISO 39
-#define XPT2046_CLK 25
-#define XPT2046_CS 33
-
+#if defined(CYD_BOARD_3248S035)
+#define SCREEN_WIDTH 480
+#define SCREEN_HEIGHT 320
+#else
 #define SCREEN_WIDTH 320
 #define SCREEN_HEIGHT 240
+#endif
 #define DHT_READ_MS 2500
 #define DHT_FAIL_TOLERANCE 3
 #define EMA_ALPHA 0.35f
 #define HISTORY_LEN 48
+#if defined(CYD_BOARD_3248S035)
+#define DRAW_BUF_SIZE (SCREEN_WIDTH * SCREEN_HEIGHT / 20 * (LV_COLOR_DEPTH / 8))
+#else
 #define DRAW_BUF_SIZE (SCREEN_WIDTH * SCREEN_HEIGHT / 10 * (LV_COLOR_DEPTH / 8))
+#endif
+
+/* Layout grid — every region has exclusive space, no overlaps */
+#if defined(CYD_BOARD_3248S035)
+#define UI_M 10
+#define UI_G 10
+#define UI_HDR_H 32
+#define UI_GAUGE_H 168
+#define UI_GAUGE_W 225
+#define UI_ARC 120
+#else
+#define UI_M 6
+#define UI_G 6
+#define UI_HDR_H 22
+#define UI_GAUGE_H 124
+#define UI_GAUGE_W 151
+#define UI_ARC 90
+#endif
+#define UI_BOT_Y (UI_HDR_H + UI_G + UI_GAUGE_H + UI_G) /* 158 */
+#define UI_BOT_H (SCREEN_HEIGHT - UI_BOT_Y - UI_M)      /* 76 */
+#define UI_BOT_W (SCREEN_WIDTH - 2 * UI_M)              /* 308 */
+#if defined(CYD_BOARD_3248S035)
+#define UI_INFO_W 180
+#else
+#define UI_INFO_W 124
+#endif
+#define UI_CHART_W (UI_BOT_W - 12 - UI_INFO_W - UI_G)   /* ~160 */

 static const lv_color_t COL_BG = lv_color_hex(0x0A1018);
 static const lv_color_t COL_PANEL = lv_color_hex(0x121C2A);
@@ -41,9 +75,8 @@ static const lv_color_t COL_OK = lv_color_hex(0x4CAF7A);
 static const lv_color_t COL_WARN = lv_color_hex(0xE6B84D);
 static const lv_color_t COL_BAD = lv_color_hex(0xE05A5A);
 static const lv_color_t COL_ARC_BG = lv_color_hex(0x243247);
+static const lv_color_t COL_CHART_BG = lv_color_hex(0x0E1622);

-SPIClass touchscreenSPI = SPIClass(VSPI);
-XPT2046_Touchscreen touchscreen(XPT2046_CS, XPT2046_IRQ);
 DHTesp dht;

 static uint32_t draw_buf[DRAW_BUF_SIZE / 4];
@@ -52,12 +85,16 @@ static lv_obj_t *arc_temp;
 static lv_obj_t *arc_hum;
 static lv_obj_t *lbl_temp_val;
 static lv_obj_t *lbl_hum_val;
+static lv_obj_t *lbl_temp_unit;
+static lv_obj_t *lbl_hum_unit;
 static lv_obj_t *lbl_temp_range;
 static lv_obj_t *lbl_hum_range;
 static lv_obj_t *lbl_comfort;
 static lv_obj_t *lbl_feels;
+static lv_obj_t *lbl_dew;
 static lv_obj_t *lbl_status;
 static lv_obj_t *lbl_uptime;
+static lv_obj_t *lbl_hint;
 static lv_obj_t *led_status;
 static lv_obj_t *bar_comfort;
 static lv_obj_t *chart;
@@ -76,6 +113,7 @@ static uint8_t fail_streak = 0;
 static bool sensor_ok = false;
 static uint8_t bright_level = 2;
 static const uint8_t BRIGHT_PWM[4] = {40, 90, 160, 255};
+static uint32_t hint_until_ms = 0;

 static void set_backlight(uint8_t level) {
  bright_level = level & 0x03;
@@ -116,9 +154,9 @@ static lv_color_t temp_color(float t) {

 static const char *comfort_text(float t, float h) {
  if (isnan(t) || isnan(h)) return "NO DATA";
-  if (t < 16 || t > 30 || h < 30 || h > 75) return "UNCOMFORTABLE";
-  if (t >= 20 && t <= 26 && h >= 40 && h <= 60) return "COMFORTABLE";
-  return "ACCEPTABLE";
+  if (t < 16 || t > 30 || h < 30 || h > 75) return "UNCOMFY";
+  if (t >= 20 && t <= 26 && h >= 40 && h <= 60) return "COMFY";
+  return "OK";
 }

 static lv_color_t comfort_color(float t, float h) {
@@ -136,27 +174,48 @@ static int comfort_score(float t, float h) {
  return constrain(score, 0, 100);
 }

+static void show_hint(const char *text, uint32_t ms) {
+  lv_label_set_text(lbl_hint, text);
+  lv_obj_remove_flag(lbl_hint, LV_OBJ_FLAG_HIDDEN);
+  lv_obj_move_foreground(lbl_hint);
+  hint_until_ms = millis() + ms;
+}
+
+static void reset_minmax(void) {
+  if (!isnan(disp_temp)) {
+    min_temp = max_temp = disp_temp;
+  } else {
+    min_temp = max_temp = NAN;
+  }
+  if (!isnan(disp_hum)) {
+    min_hum = max_hum = disp_hum;
+  } else {
+    min_hum = max_hum = NAN;
+  }
+  show_hint("min/max reset", 1200);
+}
+
 static void touchscreen_read(lv_indev_t *indev, lv_indev_data_t *data) {
-  LV_UNUSED(indev);
  static bool was_pressed = false;
  static uint32_t press_ms = 0;

-  if (touchscreen.tirqTouched() && touchscreen.touched()) {
-    TS_Point p = touchscreen.getPoint();
-    data->point.x = map(p.y, 240, 3800, 1, SCREEN_WIDTH);
-    data->point.y = map(p.x, 200, 3700, SCREEN_HEIGHT, 1);
-    data->state = LV_INDEV_STATE_PRESSED;
+  touch_read_cb(indev, data);
+
+  if (data->state == LV_INDEV_STATE_PRESSED) {
    if (!was_pressed) {
      was_pressed = true;
      press_ms = millis();
    }
-  } else {
-    data->state = LV_INDEV_STATE_RELEASED;
-    if (was_pressed) {
-      was_pressed = false;
-      if (millis() - press_ms < 400) {
-        set_backlight((bright_level + 1) & 0x03);
-      }
+  } else if (was_pressed) {
+    was_pressed = false;
+    uint32_t held = millis() - press_ms;
+    if (held >= 700) {
+      reset_minmax();
+    } else if (held < 400) {
+      set_backlight((bright_level + 1) & 0x03);
+      char buf[20];
+      lv_snprintf(buf, sizeof(buf), "brightness %u/3", (unsigned)bright_level);
+      show_hint(buf, 900);
    }
  }
 }
@@ -172,12 +231,29 @@ static void anim_arc(lv_obj_t *arc, int32_t value) {
  lv_anim_init(&a);
  lv_anim_set_var(&a, arc);
  lv_anim_set_values(&a, cur, value);
-  lv_anim_set_duration(&a, 450);
+  lv_anim_set_duration(&a, 520);
  lv_anim_set_exec_cb(&a, arc_anim_exec);
  lv_anim_set_path_cb(&a, lv_anim_path_ease_out);
  lv_anim_start(&a);
 }

+static void bar_anim_exec(void *obj, int32_t v) {
+  lv_bar_set_value((lv_obj_t *)obj, v, LV_ANIM_OFF);
+}
+
+static void anim_bar(lv_obj_t *bar, int32_t value) {
+  int32_t cur = lv_bar_get_value(bar);
+  if (cur == value) return;
+  lv_anim_t a;
+  lv_anim_init(&a);
+  lv_anim_set_var(&a, bar);
+  lv_anim_set_values(&a, cur, value);
+  lv_anim_set_duration(&a, 400);
+  lv_anim_set_exec_cb(&a, bar_anim_exec);
+  lv_anim_set_path_cb(&a, lv_anim_path_ease_out);
+  lv_anim_start(&a);
+}
+
 static lv_obj_t *make_panel(lv_obj_t *parent, int x, int y, int w, int h) {
  lv_obj_t *p = lv_obj_create(parent);
  lv_obj_set_pos(p, x, y);
@@ -186,16 +262,20 @@ static lv_obj_t *make_panel(lv_obj_t *parent, int x, int y, int w, int h) {
  lv_obj_set_style_bg_opa(p, LV_OPA_COVER, 0);
  lv_obj_set_style_border_color(p, COL_EDGE, 0);
  lv_obj_set_style_border_width(p, 1, 0);
-  lv_obj_set_style_radius(p, 14, 0);
+  lv_obj_set_style_radius(p, 12, 0);
  lv_obj_set_style_pad_all(p, 6, 0);
+  lv_obj_set_style_pad_row(p, 0, 0);
+  lv_obj_set_style_pad_column(p, 0, 0);
  lv_obj_clear_flag(p, LV_OBJ_FLAG_SCROLLABLE);
+  lv_obj_remove_flag(p, LV_OBJ_FLAG_SCROLLABLE);
  return p;
 }

 static lv_obj_t *make_gauge(lv_obj_t *parent, lv_color_t accent, int max_val) {
  lv_obj_t *arc = lv_arc_create(parent);
-  lv_obj_set_size(arc, 112, 112);
-  lv_obj_align(arc, LV_ALIGN_TOP_MID, 0, 14);
+  lv_obj_set_size(arc, UI_ARC, UI_ARC);
+  /* Leave room under arc for min/max line (~16px) */
+  lv_obj_align(arc, LV_ALIGN_TOP_MID, 0, 2);
  lv_arc_set_rotation(arc, 135);
  lv_arc_set_bg_angles(arc, 0, 270);
  lv_arc_set_range(arc, 0, max_val);
@@ -203,35 +283,66 @@ static lv_obj_t *make_gauge(lv_obj_t *parent, lv_color_t accent, int max_val) {
  lv_obj_remove_style(arc, NULL, LV_PART_KNOB);
  lv_obj_clear_flag(arc, LV_OBJ_FLAG_CLICKABLE);
  lv_obj_set_style_arc_color(arc, COL_ARC_BG, LV_PART_MAIN);
-  lv_obj_set_style_arc_width(arc, 12, LV_PART_MAIN);
+  lv_obj_set_style_arc_width(arc, 10, LV_PART_MAIN);
  lv_obj_set_style_arc_color(arc, accent, LV_PART_INDICATOR);
-  lv_obj_set_style_arc_width(arc, 12, LV_PART_INDICATOR);
+  lv_obj_set_style_arc_width(arc, 10, LV_PART_INDICATOR);
  lv_obj_set_style_arc_rounded(arc, true, LV_PART_MAIN);
  lv_obj_set_style_arc_rounded(arc, true, LV_PART_INDICATOR);
  return arc;
 }

+/* Center value+unit as a group on the arc (re-run after text changes). */
+static void layout_gauge_readout(lv_obj_t *arc, lv_obj_t *val, lv_obj_t *unit) {
+  const int gap = 3;
+  const int lift = 4; /* open-bottom arc: nudge readout slightly up */
+
+  lv_obj_update_layout(lv_obj_get_parent(arc));
+  lv_obj_update_layout(arc);
+  lv_obj_update_layout(val);
+  lv_obj_update_layout(unit);
+
+  const int32_t vw = lv_obj_get_width(val);
+  const int32_t vh = lv_obj_get_height(val);
+  const int32_t uw = lv_obj_get_width(unit);
+  const int32_t uh = lv_obj_get_height(unit);
+  const int32_t pair_w = vw + gap + uw;
+
+  const int32_t ax = lv_obj_get_x(arc);
+  const int32_t ay = lv_obj_get_y(arc);
+  const int32_t aw = lv_obj_get_width(arc);
+  const int32_t ah = lv_obj_get_height(arc);
+  const int32_t cx = ax + aw / 2;
+  const int32_t cy = ay + ah / 2 - lift;
+
+  const int32_t vx = cx - pair_w / 2;
+  const int32_t vy = cy - vh / 2;
+  lv_obj_set_pos(val, vx, vy);
+  /* Unit sits on the baseline of the value, to the right */
+  lv_obj_set_pos(unit, vx + vw + gap, vy + vh - uh - 1);
+}
+
 static void create_ui(void) {
  lv_obj_t *scr = lv_screen_active();
  lv_obj_set_style_bg_color(scr, COL_BG, 0);
  lv_obj_set_style_bg_opa(scr, LV_OPA_COVER, 0);
  lv_obj_clear_flag(scr, LV_OBJ_FLAG_SCROLLABLE);

+  /* ---- header single row (0 .. UI_HDR_H), never under panels ---- */
  lv_obj_t *title = lv_label_create(scr);
-  lv_label_set_text(title, "ROOM CLIMATE");
-  lv_obj_set_style_text_font(title, &lv_font_montserrat_16, 0);
+  lv_label_set_text(title, "CLIMATE");
+  lv_obj_set_style_text_font(title, &lv_font_montserrat_14, 0);
  lv_obj_set_style_text_color(title, COL_TEXT, 0);
-  lv_obj_align(title, LV_ALIGN_TOP_LEFT, 10, 6);
+  lv_obj_set_pos(title, UI_M, 4);

  lbl_uptime = lv_label_create(scr);
-  lv_label_set_text(lbl_uptime, "tap: brightness");
+  lv_label_set_text(lbl_uptime, "up 00:00");
  lv_obj_set_style_text_font(lbl_uptime, &lv_font_montserrat_12, 0);
  lv_obj_set_style_text_color(lbl_uptime, COL_MUTED, 0);
-  lv_obj_align(lbl_uptime, LV_ALIGN_TOP_LEFT, 10, 24);
+  lv_obj_align_to(lbl_uptime, title, LV_ALIGN_OUT_RIGHT_MID, 8, 1);

  led_status = lv_led_create(scr);
-  lv_obj_set_size(led_status, 10, 10);
-  lv_obj_align(led_status, LV_ALIGN_TOP_RIGHT, -10, 10);
+  lv_obj_set_size(led_status, 9, 9);
+  lv_obj_align(led_status, LV_ALIGN_TOP_RIGHT, -UI_M, 6);
  lv_led_set_color(led_status, COL_WARN);
  lv_led_on(led_status);

@@ -239,106 +350,158 @@ static void create_ui(void) {
  lv_label_set_text(lbl_status, "INIT");
  lv_obj_set_style_text_font(lbl_status, &lv_font_montserrat_12, 0);
  lv_obj_set_style_text_color(lbl_status, COL_MUTED, 0);
-  lv_obj_align(lbl_status, LV_ALIGN_TOP_RIGHT, -26, 8);
+  lv_obj_align(lbl_status, LV_ALIGN_TOP_RIGHT, -(UI_M + 16), 4);

-  lv_obj_t *p_temp = make_panel(scr, 6, 40, 152, 132);
+  lbl_hint = lv_label_create(scr);
+  lv_label_set_text(lbl_hint, "");
+  lv_obj_set_style_text_font(lbl_hint, &lv_font_montserrat_12, 0);
+  lv_obj_set_style_text_color(lbl_hint, COL_TEMP_WARM, 0);
+  lv_obj_set_style_bg_color(lbl_hint, COL_BG, 0);
+  lv_obj_set_style_bg_opa(lbl_hint, LV_OPA_COVER, 0);
+  lv_obj_set_style_pad_hor(lbl_hint, 6, 0);
+  lv_obj_align(lbl_hint, LV_ALIGN_TOP_MID, 0, 4);
+  lv_obj_add_flag(lbl_hint, LV_OBJ_FLAG_HIDDEN);
+
+  /* ---- gauge panels (start strictly below header) ---- */
+  const int gy = UI_HDR_H + UI_G; /* 28 */
+
+  lv_obj_t *p_temp = make_panel(scr, UI_M, gy, UI_GAUGE_W, UI_GAUGE_H);
  lv_obj_t *t_cap = lv_label_create(p_temp);
  lv_label_set_text(t_cap, "TEMP");
  lv_obj_set_style_text_font(t_cap, &lv_font_montserrat_12, 0);
  lv_obj_set_style_text_color(t_cap, COL_MUTED, 0);
-  lv_obj_align(t_cap, LV_ALIGN_TOP_LEFT, 2, 0);
+  lv_obj_align(t_cap, LV_ALIGN_TOP_LEFT, 0, -2);

  arc_temp = make_gauge(p_temp, COL_TEMP_OK, 50);
  lbl_temp_val = lv_label_create(p_temp);
  lv_label_set_text(lbl_temp_val, "--.-");
-  lv_obj_set_style_text_font(lbl_temp_val, &lv_font_montserrat_28, 0);
+  lv_obj_set_style_text_font(lbl_temp_val, &lv_font_montserrat_24, 0);
  lv_obj_set_style_text_color(lbl_temp_val, COL_TEMP_OK, 0);
-  lv_obj_align(lbl_temp_val, LV_ALIGN_CENTER, 0, 6);

-  lv_obj_t *t_unit = lv_label_create(p_temp);
-  lv_label_set_text(t_unit, "C");
-  lv_obj_set_style_text_font(t_unit, &lv_font_montserrat_12, 0);
-  lv_obj_set_style_text_color(t_unit, COL_MUTED, 0);
-  lv_obj_align(t_unit, LV_ALIGN_CENTER, 36, 10);
+  lbl_temp_unit = lv_label_create(p_temp);
+  lv_label_set_text(lbl_temp_unit, "C");
+  lv_obj_set_style_text_font(lbl_temp_unit, &lv_font_montserrat_12, 0);
+  lv_obj_set_style_text_color(lbl_temp_unit, COL_MUTED, 0);
+  layout_gauge_readout(arc_temp, lbl_temp_val, lbl_temp_unit);

  lbl_temp_range = lv_label_create(p_temp);
-  lv_label_set_text(lbl_temp_range, "min --  max --");
+  lv_label_set_text(lbl_temp_range, "-- / --");
  lv_obj_set_style_text_font(lbl_temp_range, &lv_font_montserrat_12, 0);
  lv_obj_set_style_text_color(lbl_temp_range, COL_MUTED, 0);
-  lv_obj_align(lbl_temp_range, LV_ALIGN_BOTTOM_MID, 0, 0);
+  lv_obj_align(lbl_temp_range, LV_ALIGN_BOTTOM_MID, 0, 2);

-  lv_obj_t *p_hum = make_panel(scr, 162, 40, 152, 132);
+  lv_obj_t *p_hum = make_panel(scr, UI_M + UI_GAUGE_W + UI_G, gy, UI_GAUGE_W, UI_GAUGE_H);
  lv_obj_t *h_cap = lv_label_create(p_hum);
  lv_label_set_text(h_cap, "HUM");
  lv_obj_set_style_text_font(h_cap, &lv_font_montserrat_12, 0);
  lv_obj_set_style_text_color(h_cap, COL_MUTED, 0);
-  lv_obj_align(h_cap, LV_ALIGN_TOP_LEFT, 2, 0);
+  lv_obj_align(h_cap, LV_ALIGN_TOP_LEFT, 0, -2);

  arc_hum = make_gauge(p_hum, COL_HUM, 100);
  lbl_hum_val = lv_label_create(p_hum);
-  lv_label_set_text(lbl_hum_val, "--.-");
-  lv_obj_set_style_text_font(lbl_hum_val, &lv_font_montserrat_28, 0);
+  lv_label_set_text(lbl_hum_val, "--");
+  lv_obj_set_style_text_font(lbl_hum_val, &lv_font_montserrat_24, 0);
  lv_obj_set_style_text_color(lbl_hum_val, COL_HUM, 0);
-  lv_obj_align(lbl_hum_val, LV_ALIGN_CENTER, 0, 6);

-  lv_obj_t *h_unit = lv_label_create(p_hum);
-  lv_label_set_text(h_unit, "%");
-  lv_obj_set_style_text_font(h_unit, &lv_font_montserrat_12, 0);
-  lv_obj_set_style_text_color(h_unit, COL_MUTED, 0);
-  lv_obj_align(h_unit, LV_ALIGN_CENTER, 36, 10);
+  lbl_hum_unit = lv_label_create(p_hum);
+  lv_label_set_text(lbl_hum_unit, "%");
+  lv_obj_set_style_text_font(lbl_hum_unit, &lv_font_montserrat_12, 0);
+  lv_obj_set_style_text_color(lbl_hum_unit, COL_MUTED, 0);
+  layout_gauge_readout(arc_hum, lbl_hum_val, lbl_hum_unit);

  lbl_hum_range = lv_label_create(p_hum);
-  lv_label_set_text(lbl_hum_range, "min --  max --");
+  lv_label_set_text(lbl_hum_range, "-- / --");
  lv_obj_set_style_text_font(lbl_hum_range, &lv_font_montserrat_12, 0);
  lv_obj_set_style_text_color(lbl_hum_range, COL_MUTED, 0);
-  lv_obj_align(lbl_hum_range, LV_ALIGN_BOTTOM_MID, 0, 0);
+  lv_obj_align(lbl_hum_range, LV_ALIGN_BOTTOM_MID, 0, 2);

-  lv_obj_t *p_bot = make_panel(scr, 6, 176, 308, 58);
-  lbl_comfort = lv_label_create(p_bot);
-  lv_label_set_text(lbl_comfort, "WAITING");
+  /* ---- bottom: left info | right chart (no shared space) ---- */
+  lv_obj_t *p_bot = make_panel(scr, UI_M, UI_BOT_Y, UI_BOT_W, UI_BOT_H);
+
+  lv_obj_t *info = lv_obj_create(p_bot);
+  lv_obj_set_size(info, UI_INFO_W, UI_BOT_H - 12);
+  lv_obj_align(info, LV_ALIGN_LEFT_MID, 0, 0);
+  lv_obj_set_style_bg_opa(info, LV_OPA_TRANSP, 0);
+  lv_obj_set_style_border_width(info, 0, 0);
+  lv_obj_set_style_pad_all(info, 0, 0);
+  lv_obj_clear_flag(info, LV_OBJ_FLAG_SCROLLABLE);
+
+  lbl_comfort = lv_label_create(info);
+  lv_label_set_text(lbl_comfort, "WAIT");
  lv_obj_set_style_text_font(lbl_comfort, &lv_font_montserrat_14, 0);
  lv_obj_set_style_text_color(lbl_comfort, COL_WARN, 0);
-  lv_obj_align(lbl_comfort, LV_ALIGN_TOP_LEFT, 4, 0);
+  lv_obj_set_width(lbl_comfort, UI_INFO_W);
+  lv_label_set_long_mode(lbl_comfort, LV_LABEL_LONG_CLIP);
+  lv_obj_align(lbl_comfort, LV_ALIGN_TOP_LEFT, 0, 0);

-  lbl_feels = lv_label_create(p_bot);
-  lv_label_set_text(lbl_feels, "FEELS --  DEW --");
-  lv_obj_set_style_text_font(lbl_feels, &lv_font_montserrat_12, 0);
-  lv_obj_set_style_text_color(lbl_feels, COL_MUTED, 0);
-  lv_obj_align(lbl_feels, LV_ALIGN_TOP_RIGHT, -4, 2);
-
-  bar_comfort = lv_bar_create(p_bot);
-  lv_obj_set_size(bar_comfort, 120, 10);
-  lv_obj_align(bar_comfort, LV_ALIGN_TOP_LEFT, 4, 20);
+  bar_comfort = lv_bar_create(info);
+  lv_obj_set_size(bar_comfort, UI_INFO_W - 4, 8);
+  lv_obj_align(bar_comfort, LV_ALIGN_TOP_LEFT, 0, 20);
  lv_bar_set_range(bar_comfort, 0, 100);
  lv_bar_set_value(bar_comfort, 0, LV_ANIM_OFF);
  lv_obj_set_style_bg_color(bar_comfort, COL_ARC_BG, LV_PART_MAIN);
  lv_obj_set_style_bg_opa(bar_comfort, LV_OPA_COVER, LV_PART_MAIN);
-  lv_obj_set_style_radius(bar_comfort, 5, LV_PART_MAIN);
+  lv_obj_set_style_radius(bar_comfort, 4, LV_PART_MAIN);
  lv_obj_set_style_bg_color(bar_comfort, COL_WARN, LV_PART_INDICATOR);
-  lv_obj_set_style_radius(bar_comfort, 5, LV_PART_INDICATOR);
+  lv_obj_set_style_radius(bar_comfort, 4, LV_PART_INDICATOR);
+
+  lbl_feels = lv_label_create(info);
+  lv_label_set_text(lbl_feels, "Feel --.-");
+  lv_obj_set_style_text_font(lbl_feels, &lv_font_montserrat_12, 0);
+  lv_obj_set_style_text_color(lbl_feels, COL_MUTED, 0);
+  lv_obj_set_width(lbl_feels, UI_INFO_W);
+  lv_label_set_long_mode(lbl_feels, LV_LABEL_LONG_CLIP);
+  lv_obj_align(lbl_feels, LV_ALIGN_TOP_LEFT, 0, 34);
+
+  lbl_dew = lv_label_create(info);
+  lv_label_set_text(lbl_dew, "Dew  --.-");
+  lv_obj_set_style_text_font(lbl_dew, &lv_font_montserrat_12, 0);
+  lv_obj_set_style_text_color(lbl_dew, COL_MUTED, 0);
+  lv_obj_set_width(lbl_dew, UI_INFO_W);
+  lv_label_set_long_mode(lbl_dew, LV_LABEL_LONG_CLIP);
+  lv_obj_align(lbl_dew, LV_ALIGN_TOP_LEFT, 0, 48);

  chart = lv_chart_create(p_bot);
-  lv_obj_set_size(chart, 168, 28);
-  lv_obj_align(chart, LV_ALIGN_BOTTOM_RIGHT, -2, -2);
+  lv_obj_set_size(chart, UI_CHART_W, UI_BOT_H - 16);
+  lv_obj_align(chart, LV_ALIGN_RIGHT_MID, 0, 0);
  lv_chart_set_type(chart, LV_CHART_TYPE_LINE);
  lv_chart_set_point_count(chart, HISTORY_LEN);
  lv_chart_set_range(chart, LV_CHART_AXIS_PRIMARY_Y, 10, 40);
  lv_chart_set_range(chart, LV_CHART_AXIS_SECONDARY_Y, 0, 100);
-  lv_obj_set_style_bg_opa(chart, LV_OPA_TRANSP, 0);
-  lv_obj_set_style_border_width(chart, 0, 0);
-  lv_obj_set_style_pad_all(chart, 0, 0);
-  lv_chart_set_div_line_count(chart, 0, 0);
+  lv_chart_set_update_mode(chart, LV_CHART_UPDATE_MODE_SHIFT);
+  lv_obj_set_style_bg_color(chart, COL_CHART_BG, 0);
+  lv_obj_set_style_bg_opa(chart, LV_OPA_COVER, 0);
+  lv_obj_set_style_border_color(chart, COL_EDGE, 0);
+  lv_obj_set_style_border_width(chart, 1, 0);
+  lv_obj_set_style_radius(chart, 8, 0);
+  lv_obj_set_style_pad_all(chart, 4, 0);
+  lv_obj_set_style_line_width(chart, 2, LV_PART_ITEMS);
+  lv_chart_set_div_line_count(chart, 2, 4);
+  lv_obj_set_style_line_color(chart, COL_EDGE, LV_PART_MAIN);
+  lv_obj_set_style_line_opa(chart, LV_OPA_40, LV_PART_MAIN);
  ser_temp = lv_chart_add_series(chart, COL_TEMP_WARM, LV_CHART_AXIS_PRIMARY_Y);
  ser_hum = lv_chart_add_series(chart, COL_HUM, LV_CHART_AXIS_SECONDARY_Y);
+
+  /* Keep header above any later siblings if layout drifts */
+  lv_obj_move_foreground(title);
+  lv_obj_move_foreground(lbl_uptime);
+  lv_obj_move_foreground(lbl_status);
+  lv_obj_move_foreground(led_status);
+  lv_obj_move_foreground(lbl_hint);
 }

 static void refresh_meta(void) {
  char buf[40];
  uint32_t up = millis() / 1000;
-  lv_snprintf(buf, sizeof(buf), "up %02lu:%02lu  bl %u/3",
+  lv_snprintf(buf, sizeof(buf), "up %02lu:%02lu  bl%u",
              (unsigned long)(up / 60), (unsigned long)(up % 60), (unsigned)bright_level);
  lv_label_set_text(lbl_uptime, buf);

+  if (hint_until_ms && (int32_t)(millis() - hint_until_ms) >= 0) {
+    hint_until_ms = 0;
+    lv_obj_add_flag(lbl_hint, LV_OBJ_FLAG_HIDDEN);
+  }
+
  if (sensor_ok) {
    uint32_t age = (millis() - last_ok_ms) / 1000;
    lv_snprintf(buf, sizeof(buf), "LIVE %lus", (unsigned long)age);
@@ -348,7 +511,7 @@ static void refresh_meta(void) {
 }

 static void update_ui(bool ok) {
-  char buf[40];
+  char buf[32];

  if (ok && !isnan(disp_temp) && !isnan(disp_hum)) {
    lv_color_t tc = temp_color(disp_temp);
@@ -356,34 +519,38 @@ static void update_ui(bool ok) {
    lv_snprintf(buf, sizeof(buf), "%.1f", disp_temp);
    lv_label_set_text(lbl_temp_val, buf);
    lv_obj_set_style_text_color(lbl_temp_val, tc, 0);
+    layout_gauge_readout(arc_temp, lbl_temp_val, lbl_temp_unit);
    lv_obj_set_style_arc_color(arc_temp, tc, LV_PART_INDICATOR);
    anim_arc(arc_temp, (int)lroundf(constrain(disp_temp, 0.0f, 50.0f)));

    lv_snprintf(buf, sizeof(buf), "%.0f", disp_hum);
    lv_label_set_text(lbl_hum_val, buf);
+    layout_gauge_readout(arc_hum, lbl_hum_val, lbl_hum_unit);
    anim_arc(arc_hum, (int)lroundf(constrain(disp_hum, 0.0f, 100.0f)));

-    lv_snprintf(buf, sizeof(buf), "min %.0f  max %.0f", min_temp, max_temp);
+    lv_snprintf(buf, sizeof(buf), "%.0f / %.0f", min_temp, max_temp);
    lv_label_set_text(lbl_temp_range, buf);
-    lv_snprintf(buf, sizeof(buf), "min %.0f  max %.0f", min_hum, max_hum);
+    lv_snprintf(buf, sizeof(buf), "%.0f / %.0f", min_hum, max_hum);
    lv_label_set_text(lbl_hum_range, buf);

    float feels = heat_index_c(disp_temp, disp_hum);
    float dew = dew_point_c(disp_temp, disp_hum);
-    lv_snprintf(buf, sizeof(buf), "FEELS %.1f  DEW %.1f", feels, dew);
+    lv_snprintf(buf, sizeof(buf), "Feel %.1f", feels);
    lv_label_set_text(lbl_feels, buf);
+    lv_snprintf(buf, sizeof(buf), "Dew  %.1f", dew);
+    lv_label_set_text(lbl_dew, buf);

    lv_color_t cc = comfort_color(disp_temp, disp_hum);
    lv_label_set_text(lbl_comfort, comfort_text(disp_temp, disp_hum));
    lv_obj_set_style_text_color(lbl_comfort, cc, 0);
-    lv_bar_set_value(bar_comfort, comfort_score(disp_temp, disp_hum), LV_ANIM_ON);
+    anim_bar(bar_comfort, comfort_score(disp_temp, disp_hum));
    lv_obj_set_style_bg_color(bar_comfort, cc, LV_PART_INDICATOR);

    lv_chart_set_next_value(chart, ser_temp, (int32_t)lroundf(disp_temp));
    lv_chart_set_next_value(chart, ser_hum, (int32_t)lroundf(disp_hum));
    refresh_meta();
  } else {
-    lv_label_set_text(lbl_comfort, "SENSOR ERROR");
+    lv_label_set_text(lbl_comfort, "ERROR");
    lv_obj_set_style_text_color(lbl_comfort, COL_BAD, 0);
    lv_label_set_text(lbl_status, "ERR");
    lv_led_set_color(led_status, COL_BAD);
@@ -439,16 +606,19 @@ void setup() {

  lv_init();

-  touchscreenSPI.begin(XPT2046_CLK, XPT2046_MISO, XPT2046_MOSI, XPT2046_CS);
-  touchscreen.begin(touchscreenSPI);
-  touchscreen.setRotation(2);
+  touch_init();

+#if defined(CYD_BOARD_3248S035)
+  lv_display_t *disp = lv_tft_espi_create(320, 480, draw_buf, sizeof(draw_buf));
+#else
  lv_display_t *disp = lv_tft_espi_create(240, 320, draw_buf, sizeof(draw_buf));
+#endif
  lv_display_set_rotation(disp, LV_DISPLAY_ROTATION_270);

  lv_indev_t *indev = lv_indev_create();
  lv_indev_set_type(indev, LV_INDEV_TYPE_POINTER);
  lv_indev_set_read_cb(indev, touchscreen_read);
+  lv_indev_set_display(indev, disp);

  create_ui();
  delay(1500);
--- a/src/touch.cpp
+++ b/src/touch.cpp
@@ -0,0 +1,193 @@
+#include "touch.h"
+
+#include <Arduino.h>
+
+/**
+ * 2.8": XPT2046 resistive SoftSPI bus (CS33).
+ * 3.5C (3248S035C): GT911 capacitive on I2C Wire SDA33/SCL32/INT21/RST25.
+ * Feed coords are always native panel 320x480 for LVGL ROTATION_270.
+ * (DHT11 is 1-wire on GPIO22 — Wire is free for GT911.)
+ */
+
+static int16_t clampi(int32_t v, int32_t lo, int32_t hi) {
+  if (v < lo) return (int16_t)lo;
+  if (v > hi) return (int16_t)hi;
+  return (int16_t)v;
+}
+
+#if defined(CYD_BOARD_3248S035)
+
+#include <Wire.h>
+
+/* Native panel size — not UI landscape SCREEN_* (480x320). */
+static constexpr int16_t PANEL_W = 320;
+static constexpr int16_t PANEL_H = 480;
+
+#define CYD_GT911_SDA 33
+#define CYD_GT911_SCL 32
+#define CYD_GT911_INT 21
+#define CYD_GT911_RST 25
+
+/* Minimal GT911 — no config rewrite (TAMC setResolution can hang Wire). */
+static uint8_t s_gt_addr = 0x5D;
+static constexpr uint16_t GT_POINT_INFO = 0x814E;
+static constexpr uint16_t GT_POINT_1 = 0x814F;
+
+static bool gt_write8(uint16_t reg, uint8_t val) {
+  Wire.beginTransmission(s_gt_addr);
+  Wire.write((uint8_t)(reg >> 8));
+  Wire.write((uint8_t)(reg & 0xFF));
+  Wire.write(val);
+  return Wire.endTransmission() == 0;
+}
+
+static bool gt_read(uint16_t reg, uint8_t *buf, uint8_t len) {
+  Wire.beginTransmission(s_gt_addr);
+  Wire.write((uint8_t)(reg >> 8));
+  Wire.write((uint8_t)(reg & 0xFF));
+  if (Wire.endTransmission(false) != 0) {
+    return false;
+  }
+  const uint8_t n = Wire.requestFrom(s_gt_addr, len);
+  if (n != len) {
+    return false;
+  }
+  for (uint8_t i = 0; i < len; i++) {
+    buf[i] = Wire.read();
+  }
+  return true;
+}
+
+static bool gt_probe(uint8_t addr) {
+  Wire.beginTransmission(addr);
+  return Wire.endTransmission() == 0;
+}
+
+/* TAMC-compatible address select: INT low => 0x5D, INT high => 0x14 */
+static void gt_hw_reset(bool addr_0x14) {
+  pinMode(CYD_GT911_INT, OUTPUT);
+  pinMode(CYD_GT911_RST, OUTPUT);
+  digitalWrite(CYD_GT911_INT, LOW);
+  digitalWrite(CYD_GT911_RST, LOW);
+  delay(10);
+  digitalWrite(CYD_GT911_INT, addr_0x14 ? HIGH : LOW);
+  delay(1);
+  digitalWrite(CYD_GT911_RST, HIGH);
+  delay(5);
+  digitalWrite(CYD_GT911_INT, LOW);
+  delay(50);
+  /* Backlight is GPIO27 — leave INT as input for polling / optional IRQ. */
+  pinMode(CYD_GT911_INT, INPUT);
+  delay(50);
+}
+
+static bool gt_find_addr() {
+  for (uint8_t a : {uint8_t(0x5D), uint8_t(0x14)}) {
+    if (gt_probe(a)) {
+      s_gt_addr = a;
+      return true;
+    }
+  }
+  return false;
+}
+
+void touch_init() {
+  Serial.println("Touch: GT911 I2C capacitive (3.5C) minimal");
+  Wire.begin(CYD_GT911_SDA, CYD_GT911_SCL);
+  Wire.setClock(100000);
+#if defined(WIRE_HAS_TIMEOUT) || defined(ESP32)
+  Wire.setTimeOut(50);
+#endif
+
+  if (!gt_find_addr()) {
+    Serial.println("GT911 not found — hw reset 0x5D");
+    gt_hw_reset(false);
+    if (!gt_find_addr()) {
+      Serial.println("GT911 not found — hw reset 0x14");
+      gt_hw_reset(true);
+      gt_find_addr();
+    }
+  }
+
+  Serial.printf("GT911 probe 0x5D=%s 0x14=%s using=0x%02X\n",
+                gt_probe(0x5D) ? "OK" : "no", gt_probe(0x14) ? "OK" : "no",
+                s_gt_addr);
+  Serial.printf("GT911 SDA=%d SCL=%d INT=%d RST=%d\n", CYD_GT911_SDA,
+                CYD_GT911_SCL, CYD_GT911_INT, CYD_GT911_RST);
+}
+
+void touch_read_cb(lv_indev_t * /*indev*/, lv_indev_data_t *data) {
+  uint8_t info = 0;
+
+  if (!gt_read(GT_POINT_INFO, &info, 1)) {
+    data->state = LV_INDEV_STATE_RELEASED;
+    return;
+  }
+
+  const uint8_t touches = info & 0x0F;
+  const bool buffered = (info & 0x80) != 0;
+
+  if (!buffered || touches == 0) {
+    if (buffered) {
+      gt_write8(GT_POINT_INFO, 0);
+    }
+    data->state = LV_INDEV_STATE_RELEASED;
+    return;
+  }
+
+  uint8_t pt[7];
+  if (!gt_read(GT_POINT_1, pt, 7)) {
+    gt_write8(GT_POINT_INFO, 0);
+    data->state = LV_INDEV_STATE_RELEASED;
+    return;
+  }
+  gt_write8(GT_POINT_INFO, 0);
+
+  const int16_t raw_x = (int16_t)(pt[1] | (pt[2] << 8));
+  const int16_t raw_y = (int16_t)(pt[3] | (pt[4] << 8));
+
+  /* Native 320x480 → LVGL 270. UI ≈ (H-1-raw_y, raw_x). */
+  const int16_t nx = clampi(raw_x, 0, PANEL_W - 1);
+  const int16_t ny = clampi(raw_y, 0, PANEL_H - 1);
+  data->point.x = (int16_t)((PANEL_W - 1) - nx);
+  data->point.y = (int16_t)((PANEL_H - 1) - ny);
+  data->state = LV_INDEV_STATE_PRESSED;
+}
+
+#else
+
+#include <SPI.h>
+#include <XPT2046_Touchscreen.h>
+
+#define XPT2046_IRQ 36
+#define XPT2046_MOSI 32
+#define XPT2046_MISO 39
+#define XPT2046_CLK 25
+#define XPT2046_CS 33
+
+/* 2.8 UI landscape feed (unchanged from prior main.cpp). */
+static constexpr int16_t UI_W = 320;
+static constexpr int16_t UI_H = 240;
+
+static SPIClass touchscreenSPI = SPIClass(VSPI);
+static XPT2046_Touchscreen touchscreen(XPT2046_CS, XPT2046_IRQ);
+
+void touch_init() {
+  touchscreenSPI.begin(XPT2046_CLK, XPT2046_MISO, XPT2046_MOSI, XPT2046_CS);
+  touchscreen.begin(touchscreenSPI);
+  touchscreen.setRotation(2);
+  Serial.println("Touch: XPT2046 resistive (2.8)");
+}
+
+void touch_read_cb(lv_indev_t * /*indev*/, lv_indev_data_t *data) {
+  if (touchscreen.tirqTouched() && touchscreen.touched()) {
+    TS_Point p = touchscreen.getPoint();
+    data->point.x = map(p.y, 240, 3800, 1, UI_W);
+    data->point.y = map(p.x, 200, 3700, UI_H, 1);
+    data->state = LV_INDEV_STATE_PRESSED;
+  } else {
+    data->state = LV_INDEV_STATE_RELEASED;
+  }
+}
+
+#endif
Author	SHA1	Message	Date
DESKTOP-PUHFO60\dsx2016	96d120f8ca	Document 2.8 vs 3.5 hardware differences in README. Link CYD_PROJECT_GUIDE section A for expansion pins and touch/backlight.	2026-10-25 10:40:26 +08:00
DESKTOP-PUHFO60\dsx2016	80b43b8f0a	Link CYD_PROJECT_GUIDE for 3.5" touch/backlight/LVGL pitfalls. Co-authored-by: Cursor <cursoragent@cursor.com>	2026-10-25 10:38:37 +08:00
DESKTOP-PUHFO60\dsx2016	83b1bdc5f7	Fix 3.5" black screen: drive backlight on GPIO27, not GPIO21. GPIO21 is GT911 INT on 3248S035C; PWM on the wrong pin left the panel dark. Co-authored-by: Cursor <cursoragent@cursor.com>	2026-10-25 10:34:00 +08:00
DESKTOP-PUHFO60\dsx2016	0a1b612cc9	Fix 3.5" gauge readout centering so value+unit stay aligned as digits change. Also finish cyd_35r touch path (GT911) and refresh archived 35r firmware bins. Co-authored-by: Cursor <cursoragent@cursor.com>	2026-10-25 10:30:24 +08:00
DESKTOP-PUHFO60\dsx2016	de177b281b	Add optional cyd_35r (ESP32-3248S035) with 480x320 UI; default remains 2.8.	2026-10-23 16:24:19 +08:00
DESKTOP-PUHFO60\dsx2016	39081d2a2f	Fix preview.html to native 320x240 without internal scale. Card host now scales the iframe; remove broken transform that clipped UI to the corner. Co-authored-by: Cursor <cursoragent@cursor.com>	2026-10-19 22:14:21 +08:00
DESKTOP-PUHFO60\dsx2016	23d1ce2ac6	Add HTML on-device UI preview for flasher catalog. Co-authored-by: Cursor <cursoragent@cursor.com>	2026-10-19 22:10:13 +08:00
DESKTOP-PUHFO60\dsx2016	d78a9f91cd	Archive flashable cyd_28r firmware bins for offline reflash. Add flash scripts and export helper so the board can be programmed without rebuilding from source. Co-authored-by: Cursor <cursoragent@cursor.com>	2026-10-17 17:24:38 +08:00
DESKTOP-PUHFO60\dsx2016	3173b5fffe	Keep header uptime on a single row above the gauge panels. Previous second-line up text sat under the opaque panels and got covered. Co-authored-by: Cursor <cursoragent@cursor.com>	2026-10-17 16:38:14 +08:00
DESKTOP-PUHFO60\dsx2016	b9f2d83277	Fix dashboard layout so labels no longer cover the chart. Carve exclusive regions for gauges, info, and trend; tighten spacing and polish arc/bar animation plus tap/long-press feedback. Co-authored-by: Cursor <cursoragent@cursor.com>	2026-10-17 16:35:43 +08:00
DESKTOP-PUHFO60\dsx2016	482be39c01	Document stable tag v1.1-case-snaps for easy rollback. Keep branch keep/v1.1-case-snaps alongside the prior v1.0-case-closed snapshot. Co-authored-by: Cursor <cursoragent@cursor.com>	2026-10-17 15:21:39 +08:00