Happymodel ExpressLRS ES900TX V2 915MHz 1W Radio Signal Transmitter
Description
The Happymodel ES900TX V2 is a high-performance long-range radio control transmitter module operating at 915MHz and built on the open-source ExpressLRS software. The V2 version comes in a light gray casing (unlike the previous black version) and is ready for plug-and-play operation. The module provides high communication range, minimal signal latency, and stable transmission of control commands, making it an excellent choice for experienced pilots and enthusiasts during long-range flights.
Compatibility
The module is compatible with most OpenTX firmware transmitters, including Radiomaster TX16S and Jumper series remotes (T12, T16, T18). It is worth noting that the ES900TX V2 will not work with older versions of FrSky Taranis QX7 ACCST without additional board modification — hardware updates or special modifications may be required to ensure compatibility. Before installation, it is recommended to check the compatibility of the remote control and module firmware and update the firmware if necessary.
Key Features
- Long operating range thanks to ExpressLRS architecture and powerful RF chip.
- Open-source ExpressLRS software — freedom of settings and regular feature updates.
- Minimal signal latency for precise and fast model control.
- Compatibility with OpenTX-based radio remotes and popular Radiomaster and Jumper models.
- Aluminum heatsink ensures efficient heat dissipation at increased power levels.
- Plug and play: quick installation and setup, suitable for a fast transition to ExpressLRS.
Specifications
- RF Frequency: 915MHz.
- Maximum Output Power: < 33dBm (additional cooling — fan — is recommended at power > 27dBm).
- Power Supply (VCC): 5 ~ 13V (optimal 5 ~ 9V).
- Processor: ESP32 + ESP8285.
- RF Chip: SX1276IMLTRT.
- Firmware Upload: via WiFi or ExpressLRS Configurator.
- Antenna Connector: SMA.
- Dimensions: 55 x 39 x 11 mm (with heatsink).
- Weight: 23 g (without antenna).
Usage Recommendations
For stable operation of the module at high output powers, it is recommended to install active cooling (fan) when using power above 27dBm. The binding sequence of ES900TX V2 to the ES900RX receiver, as well as detailed technical recommendations and best setup practices, are thoroughly described in the ExpressLRS documentation. It is recommended to update firmware via WiFi or ExpressLRS Configurator to receive the latest stability improvements and new features.
Package Contents
- Happymodel ExpressLRS ES900TX V2 915MHz Transmitter Module.
- 915MHz Transmitter Antenna (SMA).
Manufacturer
Brand: Happymodel.
Product Category
Drones & Quadcopters → Drone Components → Drone Spare Parts → Transmitters.
This module combines powerful hardware components (ESP processors and SX1276 chip), a well-designed cooling system with an aluminum heatsink, and the flexibility of ExpressLRS software, ensuring efficient operation across a wide range of operating conditions. The ES900TX V2 is suitable for applications requiring long range, low latency, and fine-tuning of communication parameters.
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