[suketunaik]

That was very helpful and informative reply. I did see that the yellow LED doesn’t quite go out but faints (equivalent of ‘off’) after charging
the battery using microUSB cable. It took almost 12 hours which is what I originally figured. For anyone who comes across this thread in future, a word of advice: choose your battery wisely. You may not need a very big battery.

[suketunaik]

And on the related note,
am I correct in assuming that solar panel will charge the battery even if I leave Mayfly in off mode?
In other words, I don’t need to turn on the Mayfly and then wait for the battery to be charged over the entire day. Is that correct?

[suketunaik]

Shannon, Thanks for your reply.
I am interested in measuring pH, Temp., DO, and Conductivity. What do you recommend?
Also, I just noticed on your blog that the latest version of Mayfly accepts 12 V power.
This is perfect since a lot of medium/higher grade sensor sondes work off of 12 V. The question
I have is whether Mayfly will enable sleep mode to save battery like it did with 6 V max input?
In other words, can I power the board with 12 V solar panel and regulate the battery as before?
Also, should the 12 V input be from a LiPo Battery? I hope my questions make sense.
Thanks.

[suketunaik]

Hello Shannon,
I am responding to your post from a year ago. I have been working on an interface that can take 12 V from a solar panel, run the 4-20mA sensors, convert the 12 V to 3.7 V to run Mayfly and sensor interface circuits. I have located one vendor (Global Water) that sells 4-20mA sensors at a low price but I would like to go through more options.
What do you recommend?
Also, What do you recommend for the “research-grade high-quality sensors”? Do you prefer a specific vendor?
Thank you very much.

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