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mat5664 asked

esp32 mptt ve.direct


Hi,

I am looking to connect a blue solar mppt with an esp32 via the serial connection. I have an octocoupler for this.

The Mppt is on my boat and I can't test.

I know that the masses are important without isolating via a usb-rs232. It didn't work without connecting the ground.

Is it good like this? Or should the two masses be connected?


schematic-opto-2023-03-19.png


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