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An Arduino board listens for data from the modem and converts incoming commands to flashes on an IR LED. Voila ... The Bluetooth module runs from 3.3V, and reading serial data and flashing ...
[AlxDroidDev’s] device runs off of an ATMega328p with Arduino. It operates from a 9V battery. The circuit contains an infrared receiver and also a Bluetooth module. This allows [AlxDroidDev] to ...