[publidave] wanted a simple wireless display for a bluetooth cycling cadence sensor, and soon found himself deep down the rabbit hole of Micropython and Bluetooth Low Energy on the ESP32.

The ESP8266’s big brother, the ESP32 ... displays. These boards can simplify a lot of applications where you need both WiFi and a user interface. Of the boards examined, six of them have OLED ...

As Hackaday revealed, this one comes with an E Ink display, a secondary OLED panel, and a keypad made ... The device comes powered by an ESP32-S3 processor and supports Wi-Fi 4 and Bluetooth ...

But this model is powered by a modern, low-power ESP32-S3 processor ... also added a tiny OLED screen and come up with a hybrid typing system: the little OLED screen will display characters ...