I'm looking for a reliable NPK sensor to use with an Arduino/ESP32.
Who here has gotten an NPK sensor to actually work? And which vendor did you use?
The one I have, here is from AliExpress about 18 months ago and I haven't been able to get it working after following the many different code tutorials online and in these forums, so suspect it could be the sensor itself.
The AliExpress link is here:
https://www.aliexpress.us/item/3256805985269064.html
It being AliExpress, doesn't have a vendor name or much of a spec/hardware sheet, so I could spring for something more pricey.
Thanks,
Scott
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