Happymodel EP1 RX / EP2 900RX ExpressLRS Receiver

The Happymodel EP1 and EP2 2.4G nano receivers are based on ExpressLRS firmware and ESP8285 processor. The receivers have low latency and the ability to update the firmware via WiFi.

The EP1 and EP2 differ in the presence of a built-in antenna. EP1 uses a T-shaped mini antenna with UFL connector while EP2 has a built-in ceramic antenna on the board for micro assemblies.

Thanks to the SX1280IMLTRT RF module with low latency and high update rate, these receivers are very suitable for FPV racing. Suitable for Tiny Whoop class quadcopters due to ultra lightweight and nano size.

BIND PROCEDURE

Power on the PP / EP1 / EP2 receiver, wait until the LED on the receiver goes off, immediately turn the power off and then repeat the above steps. When the receiver is turned on for the third time, the LED will flash twice, indicating that the receiver is going into tethering mode

Insert the ES24TX transmitting module or other DIY 2.4G ELRS TX into the radio and select External RF mode for the CRSF protocol. Make sure you have previously downloaded the ELRS.LUA file to the SD card and inserted it into the hardware. You will then be able to find the ELRS menu in the radio system, enter ELRS and press [Bind]. If the bind was successful, the LED on the receiver will turn solid on.