Upgrade your radio to the high-performance ExpressLRS ecosystem with the HappyModel ES24TX Transmitter Module. Based on the popular open-source ELRS project, this module provides an incredibly long-range and low-latency 2.4GHz control link, making it a massive performance upgrade for any compatible radio with a JR-style module bay.

What is ExpressLRS?

ExpressLRS (ELRS) is an open-source RC link that prioritizes speed, latency, and range. It offers packet rates up to 500Hz for a super-smooth, “connected” feel and has a much longer range than many older protocols. This module is the “transmitter” (TX) that sends the signal from your radio to the ELRS receiver in your FPV drone.

Hardware & Features

The ES24TX is built on a powerful ESP32 and SX1280 hardware combination for top-tier performance. It features selectable output power up to 250mW, providing plenty of range for freestyle and racing. This kit comes complete with a high-performance Moxon-style 24TX80 antenna and a 3D printed case for a clean, secure installation in your radio.

IMPORTANT: ExpressLRS Firmware

This module comes pre-loaded with ExpressLRS firmware. To ensure compatibility, you must update both this TX module and your ELRS receivers to the same version of ExpressLRS (e.g., V3.x.x). We highly recommend using the latest version of the ExpressLRS Configurator software to do this. You will also need to set a unique “binding phrase” in the software for all your devices. The firmware can be easily updated via WiFi.

Key Features:

• ExpressLRS Protocol: Delivers a long-range, low-latency, and high-refresh-rate radio link for superior performance.
• Up to 250mW Output Power: Selectable power levels (10mW, 25mW, 50mW, 100mW, 250mW) provide plenty of range for most FPV applications.
• JR Bay Compatible: The standard JR-style 5-pin socket fits a wide range of popular radios from brands like Radiomaster, Jumper, and older FrSky models.
• Complete Kit: Includes the TX module, a high-performance antenna, a 3D printed case, and an adapter cable for a full installation.
• WiFi Updates: The ESP32 allows for easy firmware updates over WiFi, no need to constantly plug in a USB cable.

Specifications:

• Regulatory Domain: ISM2400
• MCU: ESP32 (main), ESP8285 (aux)
• RF chip: SX1280IMLTRT
• Socket: JR standard 5-pin
• Frequency Range: 2400 MHz to 2500 MHz
• RF Output Power: 10mW ~ 250mW
• Power Supply Voltage: 5V ~ 10V
• Weight: 9.5g (without antenna）
• Dimension: 55.5mm * 39.5mm * 8mm
• Antenna Connector: SMA Female

Package includes:

• 1x ES24TX Module
• 1x 24TX80 Antenna
• 1x 3D Printed Mounting Box
• 1x Antenna Adapter Cable

Downloading firmware