Costing just $5, the ESP32 can be used to monitor the wide world around us.

As IoT devices begin to take hold within our homes, we often forget about the world outside. Using the same low power devices we us inside, coupled with some low power environment sensors, can be used to collect interesting information about the environment around us.

2x 18650
5v Buck/Boost Regulator
Waterproof Case
Misc Wiring