ESPFlight Docs v1
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Pinout

Firmware-facing v1.0 pin assignments for the ESP8266 reference baseline.

ESPFlight Docs · v1 Validated v1 documentation path

# Pin table

Pin naming The table shows both the Wemos board alias and the raw GPIO number used by firmware so D-labels and GPIO numbers are not mixed ambiguously.
Function Assignment Notes
Motor 1 D1 / GPIO 5 Front-right
Motor 2 D2 / GPIO 4 Rear-right
Motor 3 D7 / GPIO 13 Rear-left
Motor 4 D8 / GPIO 15 Front-left
Status LED D4 / GPIO 2 Firmware status output
Buzzer RX / GPIO 3 Startup/failsafe alert output
I2C SDA D6 / GPIO 12 MPU-6050 and optional VL53L0X bus
I2C SCL D5 / GPIO 14 MPU-6050 and optional VL53L0X bus

# Custom hardware

COMPATIBILITY

A custom board can use a different physical design, but changed pins or components require corresponding firmware configuration or code changes plus fresh validation.