![]() HC-12 is sold with a small solderable spring coil antenna. If you will want to use different serial speeds, HC-12 has to be reconfigured to support it. By default it is configured for 9600bps and FU3 mode that works just fine. It is fast enough for two way communication and slow enough to provide a range of about 500m.įor 9600bps there is even no need to configure HC-12. In case of HC-12, the lower the speed, the bigger the range. One thing that has to be considered here is baud speed that will be used for communication. No additional hardware, so schematics is extremely simple: It is just HC-12 module connected to flight controller's spare UART port. Ground Station - it acts as Wireless-to-Serial-to-Bluetooth bridge.Mobile - it is attached to drone and consists of single HC-12 and antenna connected to flight controller, SPRacingF3 running INAV.My telemetry link is build from two parts: Once again, it is cheap, single module costs between $4 and $5 Since I would prefer not to have my Android phone cable connected to any external devices, HC-06 Bluetooth module will be used to connect to mobile phone or tablet.HC-12 433MHz wireless serial modules will be used. ![]() To satisfy those objectives I've decided as follows: has to allow to use my phone with EZ-GUI, since I do not like to carry my notebook to an airfield.Some time ago I've chosen the second way and decided to build my own wireless serial link to archive 2 way communication between drone and ground station software. One can buy or one can build something by his own. Unfortunately, most RC radio systems lacks this functionality and additional telemetry links have to be used. They include transparent serial bridge and almost any kind of device can use it to communicate with flight controller. Some radio links, like OpenLRS provides such a possibility out of the box. Not only to get current drone position, altitude or battery level, but also, when wireless link provides such a possibility, to update drone parameters in-flight. Telemetry link between UAV (drone, airplane, boat) and laptop/mobile/ground station device can be very useful.
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