Matt Barney

A couple bits of additional info. To visually identify whether your Hydros 21 is a Gen 1 or a Gen 2, see attached photos of the sensor head on each version. Note that some Gen 1’s had red cables, but not all.

Second, as Shannon noted in the post she linked to above, the address-setting on the Gen 2 is slightly more finicky; you just have to…[Read more]

That was it – thanks!

-Matt

We’ve just had a failure to communicate with our newest Hydros 21 sensors (likely Gen 2). While I’ve had success setting the address with the b_address_change sketch, my standard Mayfly code can’t talk to the sensor and returns  values of -9999. It looks to me like the SDI-12 library has not changed since May 2021…[Read more]

These were just deployed 3 days ago and have been doing this from the beginning.

We are also seeing the missing display of “Last observation” values for all new stations we deploy, though it continues to work for stations that were deployed prior to the MonitorMyWatershed release on December 7th.

I’m also unable to delete sites (Server Error 500), and unable to delete sensors (no errors, but nothing gets deleted). I am going to report this via an issue at the Github site for the MMW data portal:
https://github.com/ODM2/ODM2DataSharingPortal/issues

Very helpful to know. Thanks for sharing, James.

Matt

Thanks for the schematic – that is helpful. I removed the solder blob using solder wick and re-added it to the res-div position, but it wasn’t pretty; it looks like I overheated the board a bit, but it still works. Later, I found a different technique in this video, which I’ll share here for anyone else who needs it.

FYI, Turner tech support tells me that Signal Ground and Supply Ground must be “Kept separate so that noise isn’t injected into the response.”

Thanks Shannon. I’m not positive that I need to use differential measurement… I’m approaching the edge of my knowledge as a non-EE. Turner doesn’t specify whether it’s OK to connect signal and power grounds to the same point — maybe I’ll ask their tech support. But when the sensor is on, I’m measuring around 13 mV between its signal ground and…[Read more]

After probing the screw term adapter, I don’t think that it will work for my purposes as I described above. If I’m correct, the way the adapter’s voltage divider works is this: When the S1 jumper is set to Res-Div and two matched resistors are installed on the S1 side of the adapter, the voltage output on the Grove’s D1 pin will be half of the…[Read more]

Hi @neilh20,

Thanks, this makes sense. I appreciate all the details; it’s helpful context.

Matt

@aufdenkampe – I’ve confirmed that indeed, all stations are now reporting data as expected.

Thanks @aufdenkampe, that sounds like a great plan. I like the idea of the forwarding log too.

We’ll watch for a change in stations’ status once the proxy is in place.

Interesting – we have 1 site with the new LTEbee, and it also weathered the cutover successfully.

@aufdenkampe, As of now, we’re not seeing any of our Digi stations that are able to upload to the new server as a result of the temporary shutdown of your old server, assuming that that indeed took place yesterday.

Matt