atbetaflight/docs/Configuration.md

Serial port functions and scenarios

Serial port scenarios

0   UNUSED
1   MSP, CLI, TELEMETRY, GPS-PASTHROUGH
2   GPS ONLY
3   SERIAL-RX ONLY
4   TELEMETRY ONLY
5   MSP, CLI, GPS-PASTHROUGH
6   CLI ONLY
7   GPS-PASSTHROUGH ONLY
8   MSP ONLY

Contraints

• There must always be a port available to use for MSP
• There must always be a port available to use for CLI
• To use a port for a function, the function's corresponding feature must be enabled first. e.g. to use GPS enable the GPS feature.
• If the configuration is invalid the serial port configuration will reset to it's defaults and features may be disabled.

Examples

All examples assume default configuration (via cli defaults command)

a) GPS and TELEMETRY (when armed)

• TELEMETRY,MSP,CLI,GPS PASSTHROUGH on UART1
• GPS on UART2

feature TELEMETRY
feature GPS
save

b) SERIAL_RX and TELEMETRY (when armed)

• TELEMETRY,MSP,CLI,GPS PASSTHROUGH on UART1
• SERIAL_RX on UART2

feature -PARALLEL_PWM
feature TELEMETRY
feature SERIAL_RX
set serial_port_2_scenario = 3
save

c) GPS and TELEMETRY via softserial

• TELEMETRY,MSP,CLI,GPS PASSTHROUGH on UART1
• GPS on UART2

feature -PARALLEL_PWM
feature PPM
feature TELEMETRY
feature GPS
feature SOFTSERIAL
set serial_port_3_scenario = 4
save

d) SERIAL_RX, GPS and TELEMETRY (when armed) MSP/CLI via softserial

• GPS on UART1
• SERIAL RX on UART2
• TELEMETRY,MSP,CLI,GPS PASSTHROUGH on SOFTSERIAL1

feature -PARALLEL_PWM
feature TELEMETRY
feature GPS
feature SERIALRX
feature SOFTSERIAL
set serial_port_1_scenario = 2
set serial_port_2_scenario = 3
set serial_port_3_scenario = 1
set msp_baudrate = 19200
set cli_baudrate = 19200
set gps_passthrough_baudrate = 19200
save