+---------------------------------------------------------------------+
|  ESP32-DevKitC-V4  ---  tft-touch                                   |
+---------------------------------------------------------------------+
|  Rails: 5V, 3V3, GND                                                |
|                                                                     |
|  tft  [ILI9341 / ILI9486 / ILI9488 SPI TFT display]  -- TFT         |
|    VCC   -> rail 3V3                                                |
|    GND   -> rail GND                                                |
|    SCK   -> spi0 (GPIO18)                                           |
|    MOSI  -> spi0 (GPIO23)                                           |
|    MISO  -> spi0 (GPIO19)                                           |
|    CS    -> GPIO5                                                   |
|    DC    -> GPIO16                                                  |
|    RESET -> GPIO17                                                  |
|    BACKLIGHT -> rail 3V3                                            |
|                                                                     |
|  touch  [XPT2046 resistive touchscreen controller (SPI)]  -- Touch  |
|    VCC   -> rail 3V3                                                |
|    GND   -> rail GND                                                |
|    SCK   -> spi0 (GPIO18)                                           |
|    MOSI  -> spi0 (GPIO23)                                           |
|    MISO  -> spi0 (GPIO19)                                           |
|    CS    -> GPIO21                                                  |
|    IRQ   -> GPIO22                                                  |
|                                                                     |
|  Passives:                                                          |
|    c1: 100nF capacitor, tft.VCC  <->  GND   (decoupling tft)        |
|                                                                     |
|  BOM:                                                               |
|    - ESP32-DevKitC-V4                                               |
|    - ILI9341 / ILI9486 / ILI9488 SPI TFT display  (tft)             |
|    - XPT2046 resistive touchscreen controller (SPI)  (touch)        |
|    - 1x 100nF capacitor                                             |
|                                                                     |
|  Power: ~81mA typical, ~222mA peak (budget 500mA)  OK               |
|                                                                     |
|  Warnings: none                                                     |
+---------------------------------------------------------------------+
