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Reply To: SDI-12 & LT500

Home › Forums › Mayfly Data Logger › SDI-12 & LT500 › Reply To: SDI-12 & LT500

2021-04-07 at 12:20 PM #15355
neilh20
Participant

    Thanks for the input, ~ Yup that is what did it for interfacing with the LT500.  I brought in each change from Dec 1st till I found it

    Doesn’t make a lot of sense to me why that impacts the protocol, but in dealing with a bug, the first stage is Detection, 2nd stage is Isolation, 3rd stage is Fixing it.

    The Isolation in this case took a couple of days.

    The software process is modify and test, and then integration test. In this case what is lacking (for me)  is having a defined reference for the SDI-12 sensor.  It also seems that working with the LT500, there are retry’s that finally work. So its a general problem with this kind of dispersed protocol testing. USB protocol testing is a lot worse, and they solve it by having plug-fests. But then there is a lot of money in selling USB devices.

    I have been keeping my eyes open for a low cost reference sensor, ideally that would be open source as well, but I haven’t found one yet.

    I’m thinking that for me, since SDI-12 is so fragile, and its not clear how to verify changes except by running them against reference sensors I should manage any changes happening more closely – fork the libs concerned. Just thinking out a loud.