Short version is that most of these are based on the ESP32 microcontroller. They allow you to upload code of any sort and have it make use of the hardware available. They also allow you to have Wi-Fi and Bluetooth allowing you to do all sorts of unique IoT stuff without needing to find a random company to make it for you and have access to your network.
As a current example, I’m planning combining the smallest one and the digit display to connect to the ODB port on my car and show my gas mileage, digital speed, etc since I have an older car.
Short version is that most of these are based on the ESP32 microcontroller. They allow you to upload code of any sort and have it make use of the hardware available. They also allow you to have Wi-Fi and Bluetooth allowing you to do all sorts of unique IoT stuff without needing to find a random company to make it for you and have access to your network.
As a current example, I’m planning combining the smallest one and the digit display to connect to the ODB port on my car and show my gas mileage, digital speed, etc since I have an older car.
Plus they’re just neat!