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conservationtechlab / pappus

Code and tools related to LoRa communication, particularly as pertains to data links to and between devices in the Biodiversity Reserve.
MIT License
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Develop and deploy solar-powered LoRa node #10

Open Trent3211 opened 2 years ago

Trent3211 commented 2 years ago

For use in the BDR. Ideally, able to run through the night. May be set up on the solar power network already at the BDR, but also develop for a self-contained power-solution that has a solar panel, battery, charge controller, and LoRa device that can send and receive messages

Trent3211 commented 2 years ago

With Arduino IMU device (see otolith) consuming less than 58.5 mWh per hour, expected power consumption for longest night in Escondido is 0.994 Wh (17 hours of no solar power projected). This can be supplied by 350 mAh, 3.7 LiPo battery (1295 mWh of energy). EDIT: it should not be supplied by the 350 mAh because it seems he Arduino should not be supplied by batteries under a certain Ah -> may require more research to confirm/deny

Trent3211 commented 2 years ago

https://www.adafruit.com/product/4755 : this is a good system, but as it is shipped it wouldn't work because of minimum max charge current is 500 mA, which is ~3x the expected charge current for a 350 mAh LiPo. Can set max charge current to 175 mA by disconnecting 1A jumper and soldering 5.7 kΩ. Check out user guide or chip datasheet for more info