Open Source solar panel charge controller with an ESP32 and Adafruit IO #IoT #ESP32 #AdafruitIO @AdafruitIO
Tim O’Brien built an “internet-connected, privately hosted smart solar MPPT power system”. This system, designed to charge his eWheel for free, costs less than $40 in parts and can power your eBike/eScooter, lights, laptop or your router/modem.
The open source firmware which sits at the center of the project, OSPController, supports forwarding variables “out to adafruit.io for really nice charts and dashboards”. We agree, these charts look great, especially with the updated data visualization blocks (such as the Gauge block) on Adafruit IO.
On the hardware side, an ESP32 (running the OSPController firmware) is connected to a DC-DC converter over serial UART. This DC-DC converter takes 18-82VDC input from a solar panel and has a programmable output of 3-60VDC to charge eBike batteries or laptops.
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