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

Firmwares

• 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 Receiver and TX module both are running ExpressLRS 2.0

•  

  Traditional Binding

• Receivers have ExpressLRS fw V2.0 preloaded without BINDING_PHRASE
• Power on and off your receiver three times
• Make sure the LED is doing a quick double blink, which indicates the receiver is in bind mode
• Use the [BIND] button on the Transmitter Lua script, which sends out a binding pulse
• Receiver will switch to slow blink once it has received binding pulse.
• Power off and power on receiver again. If the receiver LED switch to solid on from slow blink, it’s bound with your transmitter.

• Flashing with ELRS configurator

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

• Flashing with ESP_NodeMCU-PyFlasher

• Connect receiver to USB-TTL module(RX-TX, TX-RX, 5V-5V, G-GND)
• Connect USB to PC while pressing and holding the boot button in.
• open ESP_NodeMCU-PyFlasher
• 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“
• click “Flash NodeMCU“
• after flashing, Power off and power on your receiver, receiver will enter binding mode(quick double blink).

• Troubleshooting

• If receiver can’t be flashed via WIFI or BFpassthrough when it come with preloaded firmware. You may recover it by flashing it via UART.
• Wire the receiver into the USB-TTL adapter, with TX on receiver connected to the Rx on the USB-TTL, and RX on 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,  set your bind phrase and Firmware Options and once done, click on Build and Flash.

• Comparison in ELRS-R24 series

  SKU	R24-P	R24-D	R24-S
  RF Frequency	2.4GHz	2.4GHz	2.4GHz
  Antenna	IPEX MHF1	2x IPEX MHF1， Diversity	SMT Antanna
  PA/LNA	/	SE2431L	AT2401C
  Telemetry	12dbm	23dbm	20dbm
  LNA Rx_gain	/	12.5dB	12dB
  CRSF Serial receiver	DIY_2400_RX_ESP8285_SX1280	MATEK_2400_RX	MATEK_2400_RX
  PWM receiver	MATEK_2400_RX_PWM	/	/

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  Comparison between ELRS-R24-P and CRSF-PWM converter

  SKU	R24-P	CRSF-PWM-6	CRSF-PWM-C
  	Receiver with ELRS direct PWM output	CRSF to PWM Converter/Decoder
  PWM outputs	5	6	10
  RF Frequency	2.4GHz	compatible with any CRSF protocol receivers (including 433MHz, 868MHz, 915MHz, 2.4GHz)
  PWM frequency	50Hz	50, 100, 160, 330, 400Hz
  Telemetry ID	RSS, Qly SNR	RSSI, Qly SNR RxBt, Curr, Capa, Bat%, GPS, GSpd, Hdg, Alt, Sats
  CH remapping	support	No