MATEK EXPRESSLRS ELRS 2.4GHZ RECEIVER ELRS-R24-P

ELRS-R24-P Specifications

• ESP8285, SX1280/1281
• Antenna connector: IPEX MHF 1
• 5x PWM outputs
• RF Frequency: 2.4GHz (2400~2480MHz)
• Telemetry power: 12dbm
• Receiver protocol: PWM or CRSF
• Input voltage: 4~9V DC @ “+” pad
• Power dissipation:  45mA(binding), 85mA(wifi mode)
• PCB size: 25mm x 13mm
• Weight: 2g w/ antenna
• Packing: 1x ELRS-R24-P,   1x IPEX MHF1 Antennas

Firmware

• ExpressLRS MATEK_2400_RX_PWM, or DIY_2400_RX_PWMP,  PWM receiver via 1~5 PWM outputs
• ExpressLRS DIY_2400_RX_ESP8285_SX1280,  CRSF Serial receiver via TX and RX
• Firmware update via UART or WIFI

• ExpressLRS wiki for PWM receiver, Click HERE
• Make sure the Receiver and TX module both are running ExpressLRS 2.0

Traditional Binding

• Receivers have ExpressLRS FW V2.0 preloaded without BINDING_PHRASE

1. Power on and off your receiver three times
2. Make sure the LED is doing a quick double blink, which indicates the receiver is in bind mode
3. Use the [BIND] button on the Transmitter Lua script, which sends out a binding pulse
4. The receiver will switch to slow blink once it has received a binding pulse.
5. Power off and power on the receiver again. If the receiver LED switches to solid on from slow blink, it’s bound with your transmitter.

Flashing with the ELRS configurator

• MATEK_2400_RX_PWM or DIY_2400_RX_PWMP
• If using it as a normal Serial receiver, flash it with Target DIY_2400_RX_ESP8285_SX1280

Flashing with ESP_NodeMCU-PyFlasher

1. Connect receiver to USB-TTL module(RX-TX, TX-RX, 5V-5V, G-GND)
2. Connect the USB to the PC while pressing and holding the boot button in.
3. open ESP_NodeMCU-PyFlasher
4. select Serial port of USB-TTL module,  load firmware  ELRS_V2.0.0_NoPhrase_ELRS-R24-P.bin , select “Dual Output(DOUT)”  and “Yes.wipes all data“
5. click “Flash NodeMCU“
6. after flashing, Power off and power on your receiver, receiver will enter binding mode(quick double blink).

Troubleshooting

• If the receiver can’t be flashed via WIFI or BFpassthrough when it comes with preloaded firmware. You may recover it by flashing it via UART.
• Wire the receiver into the USB-TTL adapter, with TX on the receiver connected to the Rx on the USB-TTL, and RX on the receiver connected to the Tx of the USB-TTL. Wire 5V and GND of the USB-TTL to 5V and GND of the Receiver.  Press the boot button while powering the RX on, and release – the LED should now be solid.
• Select the target MATEK_2400_RX PWM or DIY_2400_RX_PWMP,  and  “UART” for Flashing Method, insert your bind phrase and Firmware Options, and once done, click on Build and Flash.