Here is the new code with hardware servo, hardware tone, telemetry, and updated RF22 library
By default, pin 5 generates a tone for RSSI warning and bad packet. I'm using a piezo buzzer in series with a 1k resistor.
Currently the tones are:
4000Hz tone for bad packets
2000Hz tone for RSSI warning
Frequency and duration of the tone can be changed.
You can easily send more data back by modifying the telemetry data structure which is currently:
struct TELE_DATA_STRUCTURE{
byte RSSI;
byte RxBad;
float Alt;
};
Just add your own variable in there.
RF22-TXRX-tele.zip (652 KB)