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wpdev_63
on June 30, 2021
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It reminds of this project[0] using lora protocol and custom icb. The advantage of using lora is that it can go up to 25 miles and uses 1/10th of an amp when in use so it can last for years.
[0]:
https://makezine.com/projects/armachat-lora-communicator?vgo...
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[0]:https://makezine.com/projects/armachat-lora-communicator?vgo...