Optoisolator U2

@stuart, can U confirm please, if the optoisolator U2 in controller board is a HMHA2801 ?
i think i burn mine, is for that I don´t have communication between the modules and the controller board !!

That one does work, more recent boards swapped to EL3H7(B)(TA)-G


LCSC stock code: C32565

You can swap to this one without any problems.

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I can´t find this in ebay (europe) china now is more 60 days :frowning:
U know where I can buy this in EU ?


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