I was a little confused by the title. This is not a D1 Mini clone, but an expansion chassis for the D1 Mini. The term "dev board" is of course colloquial and pe

I was a little confused by the title. This is not a D1 Mini clone, but an expansion chassis for the D1 Mini. The term "dev board" is of course colloquial and perhaps lacking a technical definition, but following Espressif's and others' terminology: * SoC: The raw chip * Module: SoC with supporting chips such as storage mounted to a PCB often with castellated or through hole pin-outs and a PCB antenna or an antenna connector with RF shielding and often a small LED * Dev Board: Module mounted to another PCB that facilitates programming the SoC, pin-outs in a breadboard friendly pitch, and potentially some basic devices, like an LED, button, maybe a temp, accelerometer or similar sensor * Burning Fixture: PCB with pins to temporarily hold a module for power and programming, often includes other features of a dev board like breadboard pitched pin-out Given that the D1 Mini is not much larger than the ESP-12F module it uses, I can see how this is a dev board that wraps the sparse D1 Mini dev board with some commonly used switches and sensors. At the same time, it seems to reproduce the function of a breadboard but is strongly coupled to the D1 Mini in ways that limit future use.