Sensor data collection from STM32 and SHT85 using Bluetooth Low Energy

With a pair of Circuit Playground Express boards, you can send and receive messages that will cause the boards to run prepared operations.

There isn't any pirate radio station involved here, just the secret is a Feather microcontroller reading the dial position with a magnet sensor, and an attached Music Maker FeatherWing with amplifier to play back your pre-recorded message over the radio's speaker.