A simple rotary encoder for all your projects.
It's like a potentiometer, but without end. It sends pulse to your microcontroller to let you know in which direction it turned. This version also has a button.
“An open-source firmware and development kit that helps you to prototype your IOT product within a few Lua script lines” Based on ESP8266 ESP12E wifi board, on-board USB-TTL support directly flashing from USB port, also on-board power circuits and all IOs setup.
This is a light weight, high energy density polymer lithium battery. It outputs a nominal 3.7v at 2500mAh, including built-in protection against over voltage, over current, and minimum voltage. It comes terminated with a standard 2-pin JST connector-2.54 mm spacing between pins. Please do not attempt to charge these with anything but a specialized Lithium...