Can I use 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 for high-performance, low-latency digital communication and typically requires a compatible ExpressLRS receiver, which communicates via CRSF (Crossfire) or similar digital protocols. Cheap PWM receivers usually output standard servo PWM signals and do not natively support ExpressLRS. However, if your wing’s flight controller has a UART port and supports ExpressLRS firmware, you can replace the PWM receiver with an ExpressLRS receiver module. This provides better range, lower latency, and improved reliability. To use ExpressLRS, follow these steps: 1) Select an ExpressLRS receiver compatible with your flight controller. 2) Flash the receiver with the correct ExpressLRS firmware using the ExpressLRS Configurator tool. 3) Connect the receiver to your flight controller via UART or dedicated pins. 4) Bind the receiver to your ExpressLRS transmitter module or radio. 5) Configure your flight controller to use the digital receiver input instead of PWM inputs. In short, you cannot run ExpressLRS over a cheap PWM-only receiver, but upgrading to a genuine ExpressLRS receiver is straightforward and highly recommended for wings and other RC models.