Matt Barney

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

We have 1 site that resumed uploading data at 12/8/2021 14:45 ET, with no known intervention.

5 sites are uploading after we restarted them, and 18 sites that have not reported since the cutover to the new server.

We tried the Hologram SIM pause idea on one station, but it had no effect, which isn’t too surprising.

@aufdenkampe, please keep us informed about the timing of the temporary shutdown of the old server. Thanks for your efforts.

Matt

Thanks @heather, and @aufdenkampe, that does makes sense, with the symptoms we’re seeing. Good to know that the data are not being lost in the interim.

Shutting down the old server temporarily sounds like a good idea; all of our devices are on a 15-minute sampling period, so 20+ minutes should cause at least one failed message from the device,…[Read more]

oof… what a day to release onto AWS! 🙂 https://techcrunch.com/2021/12/07/amazon-web-services-went-down-and-took-a-bunch-of-the-internet-with-it/

Nonetheless, happy to hear of this milestone for MMW!

-Matt

FWIW, I asked SIMCom about their Verizon certification, and this is their reply:

We are in the process of getting the certification.  All testing has been completed and we are just needing to schedule and official drive test with Verizon.  After this we expect to have certification shortly after.  I am estimating we will have it completed late De…

[Read more]

Ok, that’s very interesting. It sounds like the LTEBee with a Hologram SIM has been using what it sees as the ‘best’ carrier for a given connection. The Digi modems would never do that for us in areas where Verizon was the only viable option, so we had to get Verizon-branded SIMs for those cases.

Hmm, so maybe no one has tried Verizon with the new modem yet. SIMCom claims that chip supports Verizon, but (suspiciously?) they don’t have a Verizon Certification document available for download, as they do for other carriers. And they list all their supposedly supported carriers under a heading labeled “Certifications(plan)”, which makes me…[Read more]