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WXT536 SDI-12 Communication Getting Stuck

Terrapin Jun 15, 2021 06:27 PM

We are using ~ 24 Vaisala WXT536 weather stations and we continue to have issues where a WXT stops communicating via SDI-12 with a CR1000 datalogger. The communication stops anywhere between a couple of days to weeks.  Each time this happens, disconnecting the data cable from the WXT base and examining the WXT536 through its service cable shows the unit to be operating properly and reporting data from all measurement parameters.  After the WXT is reconnected to the CR1000, it starts reporting data once again until it eventually stops communicating again.

Curious if you've heard of this problem from other users and have a possible code based solution that could help unlatch or reset the SDI-12 communication between the WXT and CR1000?  Along this line, is there a method of resetting or turning on/off a particular SDI-12 or Control port?

Any thoughts appreciated.

pokeeffe Jun 15, 2021 07:08 PM

Use Connect > terminal emulator > sdi12 pass-thru to examine comms next time it dies. Sounds like a cable short

nsw Jun 16, 2021 02:17 PM

If the WXT536 is getting stuck, perhaps you could use the SW12 port o the datalogger and use that to re-cycle power to it. You could do that daily or every 12 hours, say at 00:00 and 12:00 ?

Terrapin Jun 16, 2021 03:04 PM

Thought of the SW12 option as well.  Unfortunately, it's already being used for another sensor (HMP155).  This is when I wish we had several SW12 channels to work with like a CR6 has.

nsw Jun 17, 2021 09:14 AM

You can use this very useful old 12V power switch instead, when you run out of SW12 ports on a datalogger :-

SW12V: 12 V Power Switch Assembly (campbellsci.com)

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