Add optional cyd_35r (ESP32-3248S035) with 480x320 UI; default remains 2.8.

platformio.ini

@@ -1,4 +1,4 @@
-; CYD ESP32-2432S028R — LVGL 温湿度仪表盘
+; CYD ESP32-2432S028R <EFBFBD><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><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><EFBFBD>?
 [env:cyd_28r_inv]
 build_flags =
   ${env.build_flags}
@@ -65,3 +65,19 @@ build_flags =
   -D ST7789_DRIVER=1
   -D TFT_RGB_ORDER=TFT_BGR
   -D TFT_INVERSION_ON=1
+
+; Optional 3.5" CYD ESP32-3248S035 (ST7796 resistive). Default remains cyd_28r.
+; Build: pio run -e cyd_35r
+[env:cyd_35r]
+build_flags =
+  ${env.build_flags}
+  -U ILI9341_2_DRIVER
+  -D ST7796_DRIVER=1
+  -U TFT_WIDTH
+  -U TFT_HEIGHT
+  -D TFT_WIDTH=320
+  -D TFT_HEIGHT=480
+  -U TFT_BL
+  -D TFT_BL=27
+  -D CYD_BOARD_3248S035=1
+