Using ExpressLRS with a Budget 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-speed serial protocols like CRSF, rather than traditional PWM receivers. While you can physically connect a PWM receiver to your flight controller alongside an ExpressLRS module, you won’t get the benefits of ExpressLRS’s low latency and long range through PWM. If your wing’s flight controller supports PWM input, you can use a cheap PWM receiver, but it will operate independently of the ExpressLRS link.

For best results, use an ExpressLRS-compatible receiver that communicates via CRSF or a similar digital protocol. These receivers are affordable and widely available. To set this up, bind your ExpressLRS transmitter to the ExpressLRS receiver, connect the receiver to your flight controller via UART (usually TX/RX pins), and configure the flight controller to use CRSF input. This setup maximises range, responsiveness, and reliability compared to PWM.

In summary, running ExpressLRS with a cheap PWM receiver is possible but not practical if you want ExpressLRS’s advantages. Opt for a dedicated ExpressLRS receiver for your wing.