available production of the project WFB-H 23.01 , developing software glass for creating direct communication channels over long distances using conventional wireless cards. The typical application of the project is to maintain a communication channel with a drone and the transmission of a video stream from the cameras fixed on it. The developments are distributed under the GPLV3 license. Ready-made system assemblies of the Linux cropping with the pre-designed WFB-H are formed for raspberry pi 3b ( 986 MB ).
communication channel is ensured by transferring a wireless card to a broadcast mode and using low-level WiFi packets without confirmation of transmission (ACK), which Comparison with the usual IEEE 802.11 glass allows you to circumvent the distance restrictions and reduce delays when transmitting data. In addition to a high -speed single -controlled channel for transmitting video, the installation of a double -destroyed link is supported for data exchange, on top of which the TCP/IP tunnel can be raised. To control the drone during the flight of WFB-NG, the protocol mavlink , which is used to transmit telemetry and external control using software qgroundControl . For visual monitoring of the drone parameters, OSD-interface , displayed on top of the broadcast video.
On the side of the drone and the ground station can be used wireless modules based on the rtl8812AU chip that can be used Transfer to the air monitoring mode, such as alpha awus036ach . The work requires the use of specially modified linux-drivers . Theoretically, maps based on chips may be maintained
Atheros AR9271, AR9280 and AR9287, but their work has not been checked. When using the Alfa Awu036ach wireless module and antennas with a 20DBI coefficient, it is possible to achieve a data range to a distance of up to 20 km.