Fix horizontal mirroring for ILI9488 display by updating MADCTL settings and resetting rotation to 0

esphome/cat-medication-tracker.yaml

@@ -10,6 +10,15 @@ esphome:
     then:
       - light.turn_on: backlight
       - delay: 300ms
+      - lambda: |-
+          // Override MADCTL to 0x48: MX=1, BGR=1 — fixes horizontal mirror
+          // DC pin (GPIO2) is regular GPIO; use SPIDevice for CS/data
+          digitalWrite(2, LOW);            // DC = command
+          id(my_display)->enable();        // assert CS
+          id(my_display)->transfer(0x36);  // MADCTL command
+          digitalWrite(2, HIGH);           // DC = data
+          id(my_display)->transfer(0x48);  // MX=1, BGR=1
+          id(my_display)->disable();       // deassert CS
       - component.update: my_display
 
 esp32:
@@ -64,7 +73,7 @@ display:
     cs_pin: GPIO15
     dc_pin: GPIO2
     reset_pin: GPIO4
-    rotation: 180
+    rotation: 0
     invert_colors: false
     color_order: bgr
     data_rate: 10MHz