Magnetic Sticky Node
A simple node that can be mounted just about anywhere metal and lasts for a couple days on charge
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This build uses a Waveshare RP2040-LoRa board, with a INA219 for voltage and current monitoring, and a spare 850mAh battery (similar ones found here and here) (that provides about two days of runtime) paired with a TC4056A battery charging module.
This setup is currently using the case that a Heltec V3 board came in, but will be upgraded to a 3D printed case in time. The magnets were spares, but similar ones can be found here.
