BoardPilotESP-01 Wi-Fi module (ESP8266) with ESP32
Supply 3.3 V
Bus GPIO
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| GND | Ground | GND | |
| GPIO2 | Not wired to the ESP32 | — | Must be HIGH at boot. Leave unconnected |
| GPIO0 | Not wired to the ESP32 | — | LOW at boot = flash mode. Leave HIGH for normal use |
| RXD | Input (the ESP32 drives it) | D25 | UART: the part receives data here. Connect to an ESP32 TX pin |
| TXD | Output (the part drives it) | D26 | UART: the part sends data here. Connect to an ESP32 RX pin (AT firmware: 115200 baud) |
| CH_PD | Not wired to the ESP32 | — | Enable: must be HIGH. Tie to 3.3 V |
| RST | Not wired to the ESP32 | — | Reset, active LOW. Leave unconnected or tie HIGH |
| VCC | Power | 3V3 | 3.3 V only. Draws up to about 170 mA when sending |
Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.
Sources
- Espressif ESP8266EX datasheet, Strapping pins GPIO0, GPIO2, GPIO15; supply 3.0 to 3.6 V; TX current up to 170 mA
- Espressif ESP8266 AT instruction set, Default UART 115200 baud
Try it in 3D in BoardPilot
Related parts
18650 Li-ion cell in holder28BYJ-48 stepper + ULN2003 driver433 MHz transmitter (FS1000A)74HC595 shift registerA4988 stepper driverActive buzzer
Part data: CC BY 4.0, free to reuse with credit to BoardPilot.