Using ExpressLRS with a Cheap PWM Receiver on a Wing

Question: Can I run ExpressLRS with a cheap PWM receiver on a wing?

Answer: ExpressLRS is designed primarily for high-performance digital receivers that communicate via protocols like CRSF or SPI. Cheap PWM receivers typically output individual servo signals and lack the advanced telemetry and low latency features ExpressLRS offers. However, you can still use a cheap PWM receiver with your wing, but it won’t fully utilise ExpressLRS capabilities.

To attempt this, first ensure your ExpressLRS transmitter module supports PWM output or you have a separate PWM receiver module. Connect the PWM receiver’s signal wire to your flight controller’s PWM input pins. Configure your flight controller to read PWM inputs instead of a serial protocol, usually through the Betaflight or INAV configurator.

Keep in mind that PWM receivers have higher latency and less reliable range compared to native ExpressLRS receivers. For best performance on a wing, especially at longer distances or in noisy environments, invest in a dedicated ExpressLRS receiver. This will give you improved range, lower latency, and telemetry feedback.