Features
- 902-928MHz (845MHz) communication frequency
- 60km transmission distance
- Powerful heat dissipation, reliable and stable
- 276kbps air interface rate (P840: 345kbps)
- Support 24±10V wide voltage input
The OneDLink P900 is a long-distance data transmission module for unmanned systems, providing stable and secure high-performance wireless serial communication. It supports point-to-point, point-to-multipoint, and mesh topologies. Equipped with a CNC-finished aircraft-grade aluminum housing and a built-in high-speed fan, it quickly dissipates heat and ensures long-term stable link operation. The module operates in the 902-928 MHz ISM band and utilizes Frequency Hopping Spread Spectrum (FHSS) technology to provide reliable wireless asynchronous data transmission between most serial interface-based devices. It supports a wide voltage input range of 24±10V and features screw mounting holes for easy installation.
Specifications
| OneDLink P900 | OneDLink P840 | |
| Communication frequency | 902-928MHz | 840-845MHz |
| Transport Protocol | Transparent transmission | Transparent transmission |
| Transmission Technology | Frequency hopping transmission | Frequency hopping transmission |
| Communication distance | 60km(line of sight, good electromagnetic environment) | 60km(line of sight, good electromagnetic environment) |
| Output power | 100mW~1W (20-30dBm) factory default 1W | 100mW~1W (20-30dBm) factory default 1W |
| Air interface rate | Up to 276kbps | Up to 345kbps |
| Heat dissipation capacity | Active cooling 27.2 liters per minute | Active cooling 27.2 liters per minute |
| Networking capabilities | One-to-many, relay communication, star networking | One-to-many, relay communication, star networking |
| Sensitivity |
-111dBm @ 57.6kbps -110 dBm @ 115.2 kbps -108 dBm @ 172.8 kbps -107 dBm @ 230.4 kbps -106dBm @278kbps |
-109dBM@115.2kdps |
| Serial port baud rate | 57600 (default), up to 230.4kbps | 57600 (default), up to 345kbps |
| Interface | Serial port: GH1.25 6-pin (GHR-06V-S) Antenna: SMA female pin USB: TypC-C Power connector: XT30 |
Serial port: GH1.25 6-pin (GHR-06V-S) Antenna: SMA female pin USB: TypC-C Power connector: XT30 |
| Operating temperature | -20℃ ~ +85℃ | -20℃ ~ +85℃ |
| Operating humidity | 5% to 95% non-condensing | 5% to 95% non-condensing |
| Supply voltage | 24±10V | 24±10V |
| Weight | OneDLink P900: 70g (one), antenna 32g (one) | OneDLink P840: 70g (one), antenna 32g (one) |
Interface Definition
Installation hole spacing
Wiring Instructions
The following is a reference diagram for P900 wiring. The data transmission UART port is connected to the flight controller's TELEM1 port (it can be connected to other serial ports). The baud rate of the data transmission and flight controller serial ports must be set to the same.
Note: The antenna must be installed before the module can be powered on.
UAV communication with ground station
Mission Planner
After connecting the hardware, select the corresponding device port, set the baud rate to 57600, and click Connect.
QGroundcontrol
After connecting the hardware, open the QGC ground station and the ground station will automatically connect.
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