Kalmar2 trafficLight
ESP8266 on Kalmar 2 listening traffic lights status
2X LOLIN(WEMOS) D1 R2 & mini
The Wemos Mini is a small ESP-8266 based wifi board.
11 digital io pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0)
1 analog input(3.2V...