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This set of 3DR radio telemetry at 915MHz lets you connect a flight controller to a USB or UART-enabled device, such as a computer, laptop or tablet with USB OTG. The version 2 style radios no longer need a separate air module and ground module, because both transceivers now support UART and USB connections in either mode.
With MAVLink-based ground-station software you can see live GPS position on a map, system voltage, heading, waypoint navigation and even an artificial horizon. You can also fly your aircraft with a joystick through your computer and update settings in real time. If you do not fly at all, the set can serve as a wireless serial link in DIY projects.
The system operates on the 915MHz band and provides a full-duplex link using HopeRF HM-TRP modules running custom open-source firmware. It is cost-effective, has a longer range and offers strong performance for the price.
915MHz full-duplex link: data flows in both directions at the same time.
1000mW (1W) output: rated for up to 5000m.
USB or UART on both radios: no separate air and ground module to keep track of.
MAVLink ground station support: position on a map, voltage, heading, waypoints and an artificial horizon.
Open-source firmware: custom firmware on HopeRF HM-TRP modules.
DIY serial link: usable as a plain wireless serial connection.
The two radios create a transparent wireless serial connection. Anything the flight controller sends over its telemetry port arrives at the ground-station software, and anything the software sends arrives at the flight controller. That is what makes live maps, mission uploads and parameter changes possible without a cable.
The 915MHz band offers more penetration and range than higher bands at the same power, and 1000mW of output helps push the signal towards the 5000m the listing quotes for open conditions.
Live position and status display in a MAVLink ground station
Uploading waypoint missions to an APM or Pixhawk drone
Adjusting flight parameters in real time
Joystick control of an aircraft through a computer
Wireless serial communication in DIY electronics projects
The set connects to a flight controller through the JST-GH connector and to a computer, laptop or tablet by USB (with OTG for tablets). Working voltage is 3.7-6V DC and the default baud rate is 57600.
The product title lists APM and Pixhawk flight controllers. Use a MAVLink-based ground station and check the 915MHz rules for your country before flying.
Model: X7 3DR radio telemetry
Frequency: 915MHz
Max transmitting power: 1000mW
Transmission distance: 5000m
Default baud rate: 57600
Connector: JST-GH
Working voltage: 3.7-6V DC
Working temperature: -10 to 60 C
Humidity: 10% RH to 90% RH
1 x X7 3DR radio telemetry (915MHz, 1W)
APM and Pixhawk pilots and DIY builders who want a longer-range 915MHz telemetry link with USB or UART on both radios.
915MHz.
The listing quotes 1000mW and 5000m.
No. Both transceivers support UART and USB connections.
The working voltage is 3.7-6V DC.
57600.
Yes. The listing says it can be used for DIY projects that need a wireless serial interface.
| Brand | Generic |
|---|---|
| Baud Rate | 57600 (default) |
| Connector | JST-GH |
| Frequency | 915MHz |
| Operating Range | Up to 5000 m |
| Operating Voltage | 3.7-6V DC |
| Power | 1000mW |
| Selling unit | PCS |
