The ESP32 is the successor to the wildly popular ESP8266. There seems to be no end to what the chips can do. However, despite all the wireless communication capabilities, the module doesn’t have ...

the ESP32 needs to find the sensor, connect to it, select the right service, and listen for the notifications containing the data. The data is then converted to RPM and displayed on a small OLED ...

An undocumented set of low-level commands has been discovered in the ESP32 microchip, a widely used component in IoT devices.

The Pico is also connected to an OLED display ... a Firebeetle 2 ESP32-E. This was mainly because the Pico had no battery charging circuit, requiring more space for a second module.