Dan

I updated the ADC library and changed the ADC definition on line 77 to the 1115 and that did the trick. 1.5V.   I am assuming that any past data taken in the field with the wrong ADC definition cannot be back calculated. But moving forward we have a working PAR sensor.

Thank you so much for taking the time to help solve this. Much appreciated.

Current board that I am working on in the lab is a 0.5b. But we have run into the same issue with logging/calculating PAR using version 1.0 as well. We are running a mix of 0.5 and 1.0 in the field due to many of the older 0.5’s USB ports failing.

Dan

Shannon,

As you suggested, I tested a duplicate of our set up in the lab and used a power supply source set at 1.5V in the aa0 and aa1 ports used to measure PAR on the mayfly. I get 93 mV and 470 umol for PAR. Clearly wrong. It appears the bits are recorded wrong or they are converted to mV incorrectly.  Any thoughts on a next step to…[Read more]

Shannon

I’ll give your suggestions a shot and see if we learn anything.

Thanks for the quick reply.