Can I use ExpressLRS with a basic PWM receiver on a wing?

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

Answer: ExpressLRS typically uses digital protocols like CRSF (Crossfire Serial) or ELRS native, which require a compatible receiver. Cheap PWM receivers output simple pulse-width modulation signals and do not support the ExpressLRS protocol natively. To use ExpressLRS, you’ll need a receiver designed for it, usually with a dedicated ELRS firmware and a serial connection (UART).

If your wing has limited space or you want to keep costs down, look for compact ELRS receivers that fit your model. These often support PWM output as a fallback, but to benefit from ExpressLRS’s low latency and long range, use the native digital output.

Step-by-step:
1. Identify the receiver port on your wing’s flight controller.
2. Choose a compatible ExpressLRS receiver matching your radio module frequency.
3. Flash the correct ELRS firmware to the receiver and transmitter module if needed.
4. Connect the receiver to the flight controller using UART, avoiding PWM if you want full ELRS performance.

In summary, a cheap PWM-only receiver won’t run ExpressLRS, but dedicated ELRS receivers are affordable and offer the best experience on a wing.