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Now let’s look at the necessary code to transmit telemetry data from our aircraft. We have an Arduino on board the plane, connected to the telemetry port of our FrSky receiver. I used a D4R-II. The harness that plugs into the side of the receiver (at least the one supplied with mine) has red wire…

So now we want to add our own types of data. We’ll still keep the standard FrSky telemetry data for all the standard sensors, but perhaps we want to send additional messages – these might be strings of characters, floating point values, integers, even possibly an image from a camera (though an image would take…