wiring.md

ESP-FC wiring examples and PIN mapping

ESP32 MCUs allows to remap pins, so the wiring is not final and you can remap intputs and outputs to your needs. To change pin function go to the CLI and use get pin command to check current assignment. For example, to set first output to pin 1 use command

set pin_output_0 1

Tu unmap pin function use -1 as pin number

set pin_output_3 -1

Note

There are still some limitations in remapping. Not all pins can be used with all functions. Some pins are input only, others are strapping pins and may prevent from booting if used incorrectly. please consult MCU documentation for available options. Default layout is proven to work.

Default I2C pin mapping for gyro modules

Module Pin	CLI Name	ESP32	ESP32-S3
SCK/SCL	pin_i2c_scl	22	10
SDA/SDI	pin_i2c_sda	21	9

Note

I2C driver accepts only pins from 1 to 31

Default SPI pin mapping gyro modules

Module Pin	CLI Name	ESP32	ESP32-S3
SCK/SCL	pin_spi_0_sck	18	12
SDA/SDI	pin_spi_0_mosi	23	11
SAO/SDO/ADO	pin_spi_0_miso	19	13
NCS	pin_spi_cs_0	5	8
CSB*	pin_spi_cs_1	13	7

Note: CSB is required for barometer on 10-DOF MPU-9250 modules

Tip

For better performance preffer SPI

Default Servo/Motor output mapping

Motor	CLI name	ESP32	ESP32-S3
1	pin_output_0	27	39
2	pin_output_1	25	40
3	pin_output_2	4	41
4	pin_output_3	12	42

Default Uart/Serial pin mapping

Uart	CLI name	ESP32	ESP32-S3
RX 1	pin_serial_0_rx	3	44
TX 1	pin_serial_0_tx	1	43
RX 2	pin_serial_1_rx	32	15
TX 2	pin_serial_1_tx	33	16
RX 3	pin_serial_2_rx	16	17
TX 3	pin_serial_2_tx	17	18

Default Analog pin mapping

Uart	CLI name	ESP32	ESP32-S3
Voltage	pin_input_adc_0	36	1
Current	pin_input_adc_1	39	4

Note

On ESP32 choose only pins assigned to ADC1 channels

Default PPM receiver pin mapping

Uart	CLI name	ESP32	ESP32-S3
PPM	pin_input_rx	35	6

Other pin functions

CLI name	ESP32	ESP32-S3	Comment
pin_buzzer	0	5	Status buzzer
pin_led	26	-	Status led

Example ESP32 SPI MPU-6500/MPU-9250 gyro

Example ESP32 I2C MPU-6050 gyro

Example ESP8266 I2C MPU-6050 gyro

ESP8266 has limited ability to remap pins, use get pin command to list available options.