Matek R24-TD ExpressLRS/ELRS 2.4GHz True Diversity Receiver (CRSF, ESP32-PICO-D4, SX1281)

Overview

The Matek R24-TD is an ExpressLRS/ELRS 2.4GHz true diversity receiver for long-range FPV, drones, and RC aircraft. It uses an ESP32-PICO-D4 with an SX1281 RF chipset and supports the CRSF receiver protocol for low-latency control and stable signal reception.

Key Features

• ExpressLRS 2.4GHz true diversity receiver design
• CRSF receiver protocol support
• Flashing supported via WiFi or UART
• Custom binding phrase configurable via WebUI
• RGB LED status indication
• IPEX MHF-1 antenna connector
• Solder pads labeled: G, V, TX, RX

Specifications

What's Included

• 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 does not light up.

Firmware

• ExpressLRS wiki: https://www.expresslrs.org/
• Receiver Target: Generic ESP32 True Diversity PA 2.4Ghz RX / or RadioMaster RP4-TD / or HappyModel EP Dual
• Any 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.
• Reflash with a binding phrase or connect to PC/phone via WiFi and set the binding phrase in WebUI.

Flashing via WiFi

• Power on receiver. RGB LED Rainbow fade effect at first, then Slow blink 500ms on/off. After 20s, Green blink indicates it is on WiFi Hotspot Mode.
• WiFi SSID: "ExpressLRS RX"
• Password: "expresslrs"
• More detailed steps: https://www.expresslrs.org/software/updating/wifi-updating/?h=wifi

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 select 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/

Tips

• Full Resolution Switch Configuration Modes: https://www.expresslrs.org/software/switch-config/?h=#full-resolution-switch-configuration-modes
• Powering receiver with reverse voltage will damage the regulator chip. Double check the power wires connected to the receiver.

Customer service: support@rcdrone.top (or visit https://rcdrone.top/).

Details

Matek’s ELRS R24-TD 2.4GHz true diversity receiver uses a compact 28x16mm PCB with G/V/TX/RX solder pads and dual IPEX MHF1 antenna connectors for tidy installs.

Matek R24-TD ExpressLRS receiver uses dual U.FL antenna connectors and clearly labeled G, V, TX, and RX solder pads for straightforward wiring.

The Matek R24-TD ELRS receiver uses two antenna leads for true diversity placement on compact RC builds.