Comments: LTE Cat M1/NB-IoT Shield Hookup Guide


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  • Are you planning on releasing a version that allows the use of analog inputs? Is there a trace that can be cut to enable them?

  • Is it possible to connect to sockets with path extensions (i.e. I am able to connect to my API at the root URL on the default port, but when I add the path extension it fails (assuming it's doing something like instead of

  • I've had success sending hologram messages, but none of my SMS messages make it through. Do I need to buy a phone number to make this work? Not sure where the problem could be here.

    • I'm having the same problem. Were you able to get it to work?

      • Hi there, it sounds like you are looking for technical assistance. Please use the link in the banner above, to get started with posting a topic in our forums for help from the SparkFun community.

        I know that Hologram recently changed their web API, which may have changed some things (i.e. the example code no longer works*). Here is a link to Hologram's documentation on SMS messages if you would like to dig into it. This issue might be beyond the scope of our technical support team, but they will do their best to assist you.

        (*I haven't tested out this issue so the example code may still work. I am just giving an example that a change on Hologram's end could break the example code.)

  • I've just ordered one of these "shields" (with a Hologram SIM card) on the "Black Friday/Cyber Monday" sale, just a few days after it was announced!

    I've got a "gadget" I built up based on a Beagle Bone Black (runs Linux) that posted data once an hour to the internet via a "wired" connection. Unfortunately that connection went away, so the LTE Cat looks like an attractive alternative. Although I could replace the BBB with a Raspberry Pi, that would require other hardware changes I'd rather not make. Yeah, I could probably even do it with an Arduino, but would really rather not.

    By the way, here's a "sanitized" sample of the Linux shell code I use to post the data (from a box that still has a wired connection available):

    wget -O /mnt/ram0/testresp --post-data "v1=1&v2=2018-11-26 12:01:03&v3=1&v4=1&v5=  19.0" http://<mysite>.com/datapost.php --timeout=90

    FWIW, the "datapost.php" will respond with a code indicating success or failure.

    Anyway, I'm in a bit of a time crunch for the next few weeks, and if someone has a Linux "example" to share, or tidbits of advice, I'd sure appreciate it! Thanks!

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