Specifications

• ESP32-PICO-D4, SX1281, ExpressLRS Firmware
• PA/LNA: SE2431L
• RF Frequency: 2.4GHz ISM
• Telemetry power: 22.5dbm (180mW)
• Diversity: Antenna-switching, default ANT1
• Barometer SPL06-001 (Vario)
• Receiver output:  6x PWM CH
• VBAT voltage sense: 0~25.5V
• Antenna connector: IPEX MHF-1

• Power supply: 4-13V DC @ “V” Pad
• Power dissipation:  60mA~80mA@5V IN
• PCB size: 30mm x 18mm
• Weight: 4g w/ antenna
• Packing:
  • 1x ELRS-R24-P6V
  • 2x IPEX MHF1 Antennas. 15cm
  • Dupont 2.54 pins  (Board is shipped unsoldered)

Firmwares

• ExpressLRS,  wiki, Click HERE
• Receiver Target:  Generic ESP32 PWM Vario 2.4Ghz RX, /or RadioMaster ER6-GV, /or RadioMaster ER6-G
• Receiver has ExpressLRS 3.3.2 preloaded with binding phrase “123456”,  the Receiver will never enter binding mode if using the traditional binding procedure.
• You need to reflash it with your binding phrase OR connect it to your PC/phone via WiFi and set your binding phrase in WebUI.

Tips

• Full Resolution Switch Configuration Modes
• Powering receiver with Reverse Voltage will damage the regulator chip. DOUBLE CHECK the power wires connected to the receiver.
• Transmitter fw version should be EdgeTX 2.7.1/OpenTX 2.3.15 or newer

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Flashing via Wifi

• Power on receiver. Receiver’s LED(Red) will blink slow at first, and after 30s, it should blink fast indicating it’s on Wifi Hotspot Mode.
• Wifi SSID “ExpressLRS RX”,  Password “expresslrs”
• More detailed steps,  pls refer this page.

Flashing via UART

1. Disconnect ESC and servos from receiver first.
2. Wire the receiver into the USB-TTL adapter, with TX(PWM 2 pin) on receiver connected to the Rx on the USB-TTL, and RX(PWM 3 pin) on receiver connected to the Tx of the USB-TTL. Wire 5V and GND of the USB-TTL to “V” and GND of the Receiver.
3. Press the boot button while powering on the receiver, then release – the Red LED on receiver should now be solid on.
4. In configurator,  Select the target Generic ESP32 PWM Vario 2.4Ghz RX,  or RadioMaster ER6-GV  and  “UART” for Flashing Method,  set your bind phrase and Firmware Options , Check “erase before flash” and “Force FLash “.
5. Web-flasher  https://expresslrs.github.io/web-flasher/