Digital LED and a high accuracy temperature sensor. The logic board communicates with a 2 wire I2C interface.

Red – Green – Blue (RGB) LED
MCP9808 Temperature Sensor
i2c DIgital Communications bus

OpenEVSE firmware displays:

Green – "Ready"

Yellow – "EV Connected"

Blue – "Charging"

Red – "Error"

Contents:

RGB LED
4-pin cable
Mounting plate
Hardware