Happymodel 2.4g ExpressLRS ELRS nano series receiver module EP1 RX


The Happymodel 2.4GHz ELRS nano series receiver is an open source program based on ExpressLRS, we have 3 types rx module released.

The PP RX is designed by @Jye Smith from ExpressLRS development team. Its main hardware architecture is STM32L432KBU6 MCU and SX1280 RF chip. It has a built-in ceramic antenna, which is super light and small in size.

On the basis of PP RX, we have developed the Nano 2.4GHz rx of ESP8285 version named EP1 and EP2.  The RF module of EP1/EP2 is the same like PP RX and use ESP8285 MCU . So you can upgrade firmware by WIFI , that’s too simple .

Due to the low-latency and high-refresh-rate RF module, they are very comfortable for FPV race and Long Range FPV. And very suitable for Tiny whoop because of the ultra light and Nano size.

PP(w/ antenna)EP1(w/o antenna)EP2(w/ antenna)
AntennaSMD CeramicOmnidirectionalSMD Ceramic
Firmware target6cb8152daec8ad82aec8ad82
Firmware uploadBetaflight pass-throughWifiWifi
Availability: In stock SKU: 483298 Categories: ,



Type: ISM
SX1280IMLTRT RF Module
Omnidirectional antenna
Frequency Range: 2400 MHz to 2500 MHz
Maximum receive refresh rate: 500Hz
Minimum receiver refresh rate: 25Hz
Working voltage: 5v
Weight: 0.42gram(without antenna)
Dimension: 10mm*10mm*3mm
Peak gain: 2.23dB
Package include 1pcs 40mm and 1pcs 90mm Omnidirectional antenna

Since the Official Perfect version of ELRS firmware has not been released yet, currently our PP_RX, EP1/EP2 RX and ES24TX pre-loaded firmware are all beta versions, you can upgrade the official firmware when Official perfect target available.

More details

Bind procedure:

  1. Supply power to the PP/EP1/EP2 rx, wait until the LED on the RX is off, immediately turn off the power, and then repeat again the above steps. When the RX is powered on for the third time, the LED light will start to double-flash, which means that the RX enters the binding mode
  2. Insert the ES24TX module or other DIY 2.4G ELRS TX to Radio transmitter, and choose External RF mode to CRSF protocol, then you can find ELRS menu from the Radio systems(Need to copy the ELRS.LUA file to the SD-Card tools first), Enter into ELRS and press [Bind], the LED on the RX module will getting to be solid if bind successfully.
  3. Receiver LED status meanings:
    PP RX: LED solid means bind successful or Connection established; LED double-flash means in bind mode; LED flash slowly means no signal connection from the TX module
    EP1/EP2 RX: LED solid means bind successful or Connection established; LED double-flash means in bind mode; LED flash slowly means no signal connection from the TX module; LED flash fast means in WIFI hotspot mode, you can connect the WIFI of the RX and upgrade firmware of the RX via visit from the web browser(password: expresslrs)

Additional information

Weight5 g
Dimensions14 × 8 × 0,5 cm

ExpressLRS, Happymodel

28 reviews for Happymodel 2.4g ExpressLRS ELRS nano series receiver module EP1 RX

  1. 4 out of 5

    Tomi J. (verified owner)

  2. 5 out of 5

    Carl Vargklint (verified owner)

    Arrived fast, well packaged, and was better than expected!

  3. 5 out of 5

    Radoslaw Bryl (verified owner)

    Very happy with the purchase and customer service highly recommended

  4. 4 out of 5

    Tomi (verified owner)

    Wi-Fi update, nice! Little bit work to set up firmwares etc but works great.

  5. 5 out of 5

    Patrik E. (verified owner)

  6. 5 out of 5

    Otto (verified owner)

    Great little things

  7. 4 out of 5

    Viktor (verified owner)

  8. 4 out of 5

    Tomi J. (verified owner)

  9. 5 out of 5

    Dan (verified owner)

  10. 5 out of 5

    Matus Burian (verified owner)


  11. 4 out of 5

    Mikael Persson (verified owner)

    Tiny and works well.

  12. 5 out of 5

    Robin P. (verified owner)

  13. 5 out of 5

    Kent H. (verified owner)

    Snabb och korrekt leverans. Inte hunnit montera och testa än.

  14. 5 out of 5

    Johan (verified owner)

    Bra kvalitet och funktion! WiFi uppdatering av Fw funkar snabbt och lätt!

  15. 5 out of 5

    Kent (verified owner)

    Inte använt än

  16. 5 out of 5

    Tomaz V. (verified owner)


  17. 4 out of 5

    Per (verified owner)

  18. 5 out of 5

    Anonymous (verified owner)

    Worked just fine, no problems what so ever, could however be examples on how to mount the antenna and also the pcb

  19. 5 out of 5

    Alexander (verified owner)

  20. 5 out of 5

    Patrik E. (verified owner)

  21. 5 out of 5

    Emil (verified owner)

  22. 1 out of 5

    EMILIO RAPPOSELLI (verified owner)

    20 euro for a shipping very poor! After 7 days the pack still not arrived! Waiting in Germany somewhere. Worst service I ever seen. From Cina is much more faster and costs few euros

  23. 5 out of 5

    Bruneau MELIER (verified owner)

  24. 4 out of 5

    christoffer M. (verified owner)

  25. 5 out of 5

    Dan (verified owner)

  26. 5 out of 5

    Tom Engman (verified owner)

  27. 5 out of 5

    Nikola Z. (verified owner)

  28. 4 out of 5

    Fredrik (verified owner)

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