Happymodel Fyujon is an ELRS RC receiver with an OpenVTX video transmitter in one. If necessary, the board can be split into a separately functioning video transmitter and RC receiver. The board has mounting holes of 16x16mm, 20x20mm and 25.5x25.5mm. Thanks to the low weight of 2.1g, the board is especially suitable for Toothpicks or small Cinewhoops.
ExpressLRS is an advanced open source RC system with long range, low latency, high refresh rate and lots of useful features.
OpenVTX is a firmware designed for video transmitters that provides support for both Smart Audio 2.1 and the IRC Tramp protocol. The video transmitter can only be controlled via the control unit via the SmartAudio or IRC Tramp protocols.