nanocastro on the GOSH Forum has confirmed that IO Rodeo’s pH FeatherWing is fully open source, as are their two pHMetros. Assuming we can get the same accuracy out of these and a standard probe as we can with one of the closed source options above (at least I couldn’t see evidence that the 4 linked in my earlier post are open) I’d be more inclined to buy one of them first.
Since it’s open, there appears to be good documentation in English and there are hardware calibration buttons that I assume may remove potential plug-in complexity, I’ll order a pH FeatherWing, unless anyone pipes up soon to say they’ve already had success with another route.
Do you think we would actually need the Adafruit Feather for it, or could we have it all running on the Pioreactor’s Raspberry Pi? I’ll ask Jo & William on the GOSH forum too, since they appear to be its creators…