Description

Happymodel EP1 2.4ghz ExpressLRS Receiver

The Happymodel 2.4GHz ELRS nano receiver series is based on the open source ExpressLRS project, with 3 new rx modules.

The PP RX was 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 compact.

Based on the PP RX, we have developed the ESP8285 Nano 2.4GHz receivers named EP1 and EP2.  The RF module in the EP1/EP2 is the same as the PP RX and uses ESP8285 MCU . This also allows you to upgrade firmware by WIFI , it’s too simple.

Due to the low-latency and high-refresh-rate RF module, they are ideally suited for FPV racing and Long Range. And very suitable for Tiny whoop because of the ultra light weight and small size.

Specifications:
PP_RX
Type: ISM
STM32L432KBU6 MCU
SX1280IMLTRT RF Module
SMD Ceramic antenna
Frequency Range: 2400 MHz to 2500 MHz
Maximum receive refresh rate: 500Hz
Minimum receiver refresh rate: 25Hz
Working voltage: 5v
Weight: 0.47gram
Dimension: 10mm*10mm*6mm
Peak gain: 3.7dB

EP1_RX
Type: ISM
ESP8285 MCU
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 1pc 40mm and 1pcs 90mm Omnidirectional antenna

EP2_RX
Specifications:
Type: ISM
ESP8285 MCU
SX1280IMLTRT RF Module
SMD Ceramic antenna
Frequency Range: 2400 MHz to 2500 MHz
Maximum receive refresh rate: 500Hz
Minimum receiver refresh rate: 25Hz
Working voltage: 5v
Weight: 0.44gram
Dimension: 10mm*10mm*6mm
Peak gain: 3.7dB

More details
https://github.com/ExpressLRS/ExpressLRS

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 entered 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 successful.
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 10.0.0.1 from the web browser(password: expresslrs)

Package includes:

1pc EP1 Receiver
1pc 40mm and 1pcs 90mm Omnidirectional antenna