Using ExpressLRS with a Basic PWM Receiver on a Wing

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

Answer: ExpressLRS is designed primarily to work with receivers that support digital protocols like CRSF (Crossfire) or ELRS native, which provide low latency and high reliability. Cheap PWM receivers output standard PWM signals, which ExpressLRS transmitters do not natively support. However, you can still use ExpressLRS with a PWM receiver if your flight controller can convert PWM inputs into the appropriate serial protocol.

To do this, connect your PWM receiver channels to the flight controller’s PWM input pins. Then, configure your flight controller firmware (like Betaflight or iNav) to read these PWM signals and output control via ExpressLRS using a compatible module. Note that this adds latency and reduces the benefits of ExpressLRS’s modern protocol.

For best results, consider investing in an ExpressLRS-native receiver for your wing. They are affordable, reliable, and provide better range and response. If you must use a cheap PWM receiver, ensure your flight controller supports PWM inputs and configure it accordingly.