Transform your RC experience with the cutting-edge Matek ExpressLRS/ELRS 2.4GHz True Diversity Receiver, R24-TD, a high-performance receiver designed for enthusiasts demanding precision and reliability. Powered by the robust ESP32-PICO-D4 chipset and SX1281 radio, this receiver ensures a seamless, interference-free connection over the 2.4GHz ISM frequency band.

Key Features:

• High Power Output: Features a PA/LNA AT2401C with a telemetry power of 20dbm (100mW), optimizing range and signal strength.
• Advanced Diversity System: Incorporates true diversity technology to significantly enhance reception and minimize signal dropouts.
• Versatile Connectivity: Supports CRSF protocol and includes dual IPEX MHF-1 antenna connectors, ensuring flexible antenna placement and superior reception.
• Compact and Lightweight: With a PCB size of just 28mm x 16mm and weighing a mere 4 grams with the antenna, it’s built for minimal impact on your drone’s performance.
• Multiple Firmware Options: Comes preloaded with ExpressLRS 3.3.2 firmware, supporting various configurations and customizations.

Specifications

• ESP32-PICO-D4, SX1281, ExpressLRS Firmware
• PA/LNA: AT2401C
• RF Frequency: 2.4GHz ISM
• Telemetry power: 20dbm (100mW)
• True Diversity
• Receiver protocol: CRSF
• Antenna connector: IPEX MHF-1

• Power supply: 4-13V DC @ “V” Pad
• Power dissipation: 100mA~170mA@5V IN
• PCB size: 28mm x 16mm
• Weight: 4g w/ antenna
• Packing:
  • 1x ELRS-R24-TD
  • 2x IPEX MHF1 Antennas. 15cm

RGB LED Status

• [Rainbow fade effect], Starting Up
• [Green heartbeat], Web update mode enabled
• [Slow blink 500ms on/off ], Waiting for connection from transmitter
• [Red flashing 100ms on/off], Radio chip not detected
• [Orange Double blink then pause], Binding mode enabled
• [Orange Triple blink then pause], Connected to transmitter but mismatched model-match configuration
• [Solid single color Connected to a transmitter], color indicates packet rate
• in Boot mode, RGB LED doesn’t light up.

Firmwares

• ExpressLRS, wiki, Click HERE
• Receiver Target: Generic ESP32 True Diversity PA 2.4Ghz RX /or RadioMaster RP4-TD /or HappyModel EP Dual
• Any of variants based on Target ” Generic ESP32 True Diversity PA 2.4Ghz RX” can be flashed.
• 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.

Flashing via Wifi

• Power on receiver. RGB LED Rainbow fade effect at first, then Slow blink 500ms on/off. after 20s, Green blink indicating it’s on Wifi Hotspot Mode.
• Wifi SSID “ExpressLRS RX”, Password “expresslrs”
• More detailed steps, pls refer this page .

Flashing via UART

1. 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.
2. Press the boot button while powering on the receiver, then release – the RGB LED will not turn on.
3. In Configurator, Select the target Generic ESP32 True Diversity PA 2.4Ghz RX, or RadioMaster RP4-TD, or HappyModel EP Dual and ” UART ” for Flashing Method, set your bind phrase and Firmware Options , Check ” erase before flash ” and ” Force FLash “.
4. Web-flasher https://expresslrs.github.io/web-flasher/