Logging Ham Radio repeater usage with a Baofeng and Adafruit IO #HamSunday

The Whiskey Tango Hotel blog writes:

The Austin N5OAK Ham Radio Club Repeater seems to be pretty active.  That shouldn’t surprise us much because the club has a lot of activities and a lot of enthusiastic members.  Still, we wondered just how active and opened the spare parts drawer to see if it held a solution.

Turns out the spare parts drawer did; take a look at the wiring diagram at the top of the page.   We simply used an Espressif ESP32-C3 Dev Board with an input pin wired to to the output speaker of a Baofeng HT tuned to the repeater frequency.  We monitor the C3 input pin and if it sees a signal the repeater in transmitting.  We push that data to Adafruit IO at the top of each hour to graph the history.

The post lays out the details and has Arduino code. See it here.

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