7.5-inch monochrome E Ink ePaper terminal (800x480, 4-level grayscale, partial refresh 2-5 s) powered by an ESP32-S3 with 8 MB PSRAM and 32 MB flash, in a metal enclosure with a 2000 mAh battery (~3 months), temperature/humidity sensor, buzzer, reserved microphone, microSD slot…
3.3 V supply for external devices
Common ground reference
GPIO46 / general purpose I/O with analog input
GPIO2 / GPIO with ADC1 channel 4
GPIO17 / UART1 transmit
GPIO18 / UART1 receive
GPIO20 / I2C0 clock
GPIO19 / I2C0 data
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| HEADER_3V3 (pin 1) | power | 3.3 V supply for external devices | 3.3 V | |
| GND (pin 2) | ground | Common ground reference | ||
| ESP_IO46 (pin 3) | gpio | GPIO46 / general purpose I/O with analog input | 3.3 V | |
| ESP_IO2/ADC1_CH4 (pin 4) | adc | GPIO2 / GPIO with ADC1 channel 4 | 3.3 V | |
| ESP_IO17/TX1 (pin 5) | uart | GPIO17 / UART1 transmit | 3.3 V | |
| ESP_IO18/RX1 (pin 6) | uart | GPIO18 / UART1 receive | 3.3 V | |
| ESP_IO20/I2C0_SCL (pin 7) | i2c | GPIO20 / I2C0 clock | 3.3 V | |
| ESP_IO19/I2C0_SDA (pin 8) | i2c | GPIO19 / I2C0 data | 3.3 V |
USB · 3.3 V
Confirm the data interface matches your host board.
Module pins: HEADER_3V3 (pin 1), GND (pin 2), ESP_IO46 (pin 3), ESP_IO17/TX1 (pin 5), ESP_IO18/RX1 (pin 6), ESP_IO20/I2C0_SCL (pin 7), ESP_IO19/I2C0_SDA (pin 8). Schematik maps them to your board in the app.
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