Waiting For A Letter? This IoT Mailbox Will Tell You Exactly When It ... - Hackaday

Hackaday

Waiting For A Letter? This IoT Mailbox Will Tell You Exactly When It ... Hackaday The project uses an Arduino Uno, an ESP 8266 wifi module, and an idIoTware shield board — making specific use of its RGB LED and light dependent resistor(LDR). Configuring the RGB LED on the idIoTware board to a steady white light sets the baseline ...