The BlueberryE Uno335 is a new Arduino Uno compatible board that has been created to provide an easy way to communicate with wireless 3.3v sensors.. The new BlueberryE board is fitted with a 3.3V ...

All it uses is a TSL261 Light-to-Voltage sensor connected to an Arduino with an Ethernet shield attached. ... The pulse is emitted probably once every one kilowatt-hour of energy is consumed, ...