Product overview
The JHEMCU ExpressLRS 900RX is an open-source ELRS receiver for connection to a flight controller and binding with an ELRS transmitter module. Its electronics combine an ESP8285 microcontroller with SX1276 RF hardware. The FCC configuration operates at 915MHz, with a maximum receiving refresh rate of 500HZ and a minimum of 25HZ. Working voltage is 5V. The receiver measures 11mm × 18mm × 3mm and weighs 0.6g excluding the antenna, providing a compact receiver format for flight-control installations.
The receiver uses BETAFPV_ 900_ RX 3.0.0.HEX firmware and provides LED indications for binding, signal reception and Wi-Fi upgrade mode. Double flashing indicates binding mode, slow flashing indicates that no transmission signal is being received, and a steady light indicates signal reception. Binding is performed through ELRS.LUA on the remote control; after successful binding, the LED remains lit and telemetry signals can be received. The package supplies one receiver, four wires and one T-shaped antenna.
