Under the cover of a ESP8266...
The silver plate is to fulfill the FCC requirements https://en.wikipedia.org/wiki/FCC_Declaration_of_Conformity and to protect the components. The first versions of the ESP8266 were not FCC approved ;-)
Like these ? (Node MCU):I've bought two ESP's with an micro USB port (easier to handle). I flashed this Basic interpreter for a quick start: https://www.esp8266basic.com/ You can edit the source code via browser (C64-feeling) and the just run the code (or start it at boot automatically). Very easy. Perfect for home automation or other experiments due to the very low power supply.
Why not use B4R?I've bought two ESP's with an micro USB port (easier to handle). I flashed this Basic interpreter for a quick start: https://www.esp8266basic.com/ You can edit the source code via browser (C64-feeling) and the just run the code (or start it at boot automatically). Very easy. Perfect for home automation or other experiments due to the very low power supply.
Node MCU
Why not use B4R?