Wiring — ILI9488 3.2” TFT Display

v0.3 and v0.4: TFT Display

Replaces the OLED. CP2102 and ELM327 wiring stays the same for v0.4.

ILI9488 SPI → ESP32

TFT Pin	ESP32 Pin	Wire colour
VCC	3.3V	Red
GND	GND	Black
SCK	GPIO18	Blue
MOSI	GPIO23	Green
DC	GPIO2	Orange
RESET	GPIO4	Pink
CS	GPIO15	Purple

graph LR
    subgraph ESP32
        E_3V3[3.3V]
        E_GND[GND]
        E_18[GPIO18]
        E_23[GPIO23]
        E_2[GPIO2]
        E_4[GPIO4]
        E_15[GPIO15]
    end

    subgraph ILI9488 TFT
        T_VCC[VCC]
        T_GND[GND]
        T_SCK[SCK]
        T_MOSI[MOSI]
        T_DC[DC]
        T_RST[RESET]
        T_CS[CS]
    end

    E_3V3 -->|Red| T_VCC
    E_GND -->|Black| T_GND
    E_18 -->|Blue| T_SCK
    E_23 -->|Green| T_MOSI
    E_2 -->|Orange| T_DC
    E_4 -->|Pink| T_RST
    E_15 -->|Purple| T_CS

Library configuration

Libraries required:

TFT_eSPI — configure User_Setup.h for ILI9488 and the SPI pins listed above

WARNING: ILI9488 runs on 3.3V logic — matches ESP32 directly. No level shifter needed. Do NOT connect VCC to 5V.

WARNING: When display arrives — check which driver chip it uses (ILI9488 or ST7789). Look on back of board. Library config differs slightly between the two.