This FM transmitter module works with ESP32 sensors board. You can change radio station by either pressing the toggle switches or doing an auto scan for radio stations. Stereo audio is output to earpiece, and volume can be controlled by pressing the toggle switches.
This module is one of the soldering workshops where all through-hole components need to be soldered. Once the board is completed, connect it to ESP32 Sensors Board, and upload this FM transmitter program to make it a complete radio.