ESP32 development board with a built-in 2.8-inch 320 × 240 ILI9341 TFT, XPT2046 resistive touch, microSD slot, CH340 USB-to-UART, RGB LED, photoresistor, speaker output, Wi-Fi and Bluetooth.
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VIN | 1 | power | 5 | |
| GPIO1 / TX0 | 2 | uart tx | ||
| GPIO3 / RX0 | 3 | uart rx | ||
| GND | 4 | ground | ||
| GND | 1 | ground | ||
| GPIO35 | 2 | gpio input | ||
| GPIO22 | 3 | gpio | ||
| GPIO21 / TFT_BL | 4 | reserved | ||
| GND | 1 | ground | ||
| GPIO22 | 2 | gpio | ||
| GPIO27 | 3 | gpio | ||
| 3.3V | 4 | power | 3.3 | |
| Speaker+ | 1 | audio | ||
| Speaker- | 2 | audio |
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