Small battery for your ESP8266 devices.
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Add 12 analog pins to the D1 Mini ESP8266 board
Shields for the D1 Mini ESP8266 board using the ISSI chips
A simple display for weather forecasts.
A version of Tote with the D1 Mini ESP8266 board as a brain.
A shield for the D1 Mini ESP8266 board with HT16K33 chip and 8x8 mini LED matrix.