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 convenient for FPV racing. Suitable for Tiny Whoop class quadcopters due to its ultra lightweight and nano size.
EP1 RX Features
Frequency range: 2400 to 2500MHz
Processor: ESP8285
RF module: SX1280IMLTRT
Maximum receive refresh rate: 500Hz
Minimum receiver refresh rate: 25Hz
Peak gain: 2.23dBi
Protocol: CRSF (Betaflight)
Firmware target: aec8ad82
Operating Voltage: 5V
Size: 10 x 10 x 3mm
Weight: 0.42g (without antenna)
Accessories EP1 RX
1 x Happymodel EP1 RX receiver
1 x T-shaped omni-directional antenna 40mm
1 x T-shaped omni-directional antenna 90mm
EP2 RX characteristics
Frequency range: 2400 to 2500MHz
Processor: ESP8285
RF module: SX1280IMLTRT
Built-in antenna: SMD 2.4G patch-ceramic antenna
Maximum receive refresh rate: 500Hz
Minimum receiver refresh rate: 25Hz
Peak gain: 3.7dBi
Protocol: CRSF (Betaflight)
Firmware target: aec8ad82
Operating Voltage: 5V
Size: 10 x 10 x 6mm
Weight: 0.44g (without antenna)
Accessories EP2 RX
1 x Happymodel EP2 RX receiver
1 x heat shrink
Recommendations
On the official Happymodel website at the following link you can download the appropriate firmware for your module or receiver. There are two types of ES24TX firmware: one corresponding to the Happymodel PP RX receiver (program version ID 6cb8152d), and the other corresponding to the Happymodel EP1 and EP2 RX receivers (program version ID aec8ad82). The factory default firmware is aec8ad82, which supports EP1 and EP2 RX receivers.
You can download the firmware from the website and then update the firmware by connecting to the ES24TX Wi-Fi access point, go to "10.0.0.1" in your browser (password: expresslrs).
Binding procedure
Apply power to the PP / EP1 / EP2 receiver, wait until the LED on the receiver goes off, immediately turn off the power and then repeat the above steps. When the receiver is turned on for the third time, the LED will start flashing twice, which means that the receiver is entering binding mode
Insert the ES24TX or other DIY 2.4G ELRS TX transmit module into the radio hardware and select External RF mode for the CRSF protocol. Make sure that before doing this, you have 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 systems, enter ELRS and click [Bind]. If the bind was successful, the LED on the receiver will become permanently lit.
LED indication of EP1 / EP2 RX receivers:
A lit LED indicates successful binding or a connection has been established
A double flash of the LED indicates that the receiver is in binding mode.
Slow flashing LED means no signal from the TX module.
Fast flashing LED means that the receiver is in WiFi hotspot mode, you can connect to WiFi and update the firmware of the receiver through a web browser by visiting the page 10.0.0.1 (password: expresslrs).
Brand: HappymodelSKU 15967
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