Battery powered motion sensor using Blynk to send notifications to your phone.

Having setup Home Assistant a while back I needed a movement sensor that could run on battery. The NodeMCU Multisensor remixed from Bruh Automation led me to create a simple motion sensor that can be run on an 18650 battery for months if not years. Using a Nodemcu v1.0 and making use of its deep sleep capability minimizes power usage only triggering notifications after motion.

Parts:
Nodemcu Development board
PIR Sensor
18650 Battery
Some wires
Blynk account
1k resistor
10k resistor
2N222 NPN Transistor

Arduino code on github here complete with wiring diagram.

XXL Kossel

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