Using ExpressLRS with a Basic PWM Receiver on a Wing

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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 (Crossfire) rather than traditional PWM receivers. While you might physically connect a PWM receiver to an ExpressLRS transmitter, you won’t get the benefits of low latency and long range that ExpressLRS offers. Instead, use an ExpressLRS-compatible receiver that supports CRSF or ELRS protocols.

If your wing only has a PWM input, consider upgrading to a small ELRS receiver that outputs PWM or use a flight controller that can translate ELRS’s serial data to PWM for your wing’s servos. Here’s a practical approach:

  1. Buy a dedicated ExpressLRS receiver compatible with your transmitter module.
  2. Connect the receiver’s serial output to a flight controller or servo controller capable of handling ELRS signals.
  3. If necessary, configure the flight controller to output PWM signals to your servos.
  4. Bind the transmitter and receiver following ExpressLRS instructions.

This setup ensures reliable communication with low latency and extended range, which a cheap PWM-only receiver can’t provide with ExpressLRS technology.

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