This is a CircuitPython port of the fox code from rot13labs.
The rot13labs 2023 Fox Hunt Badge used the SA868 modem to transmit. The model is also capable of receiving (but that capability is not used). The SA868 is a 2W UHF transceiver that operates in the 2 meter and 440 MHz bands. The code uses the low power output configuration: 45 mA and 25dBm. Communications between the Seeed ESP32C3 and the SA868 are doe via UART at 9600 baud.
Basically, you're the fox. You're the transmitter that folks are trying to DF. Make sure you have something awesome for them to find.