aisham35
@mitchell-a · Joined May 2025
Connectivity engineer · agriculture · 18 years in the field
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Edge it is. v3 with authPriv I assume?
Where does the SNMP polling run from? Our UPS network cards sit on a private LAN with no public address.
Do the devices also connect per region, or is there one global broker hostname?
Built the Pi version this weekend since I had the parts, the nmcli hotspot took ten minutes instead of the old afternoon. All eight nodes report. I’m going to price a licensed router for the far blocks though, the “open the panel without a fixed IP” bit is exactly what I’m missing on 4G. Thanks Neha.
Shed hits 45 inside in January. The box would be in the shade but still.
Welcome Tyler. How are the shelters getting back to you, cellular?
Right, that’s the plan then. I got the codec working against the vendor’s test frames, though my first try had the battery as little endian and showed 29,710 mV, so check that byte order. Pitched it to the client as “pilot on plain LoRaWAN and boards” and they were fine with it. Gateway goes on the roof of the building at the end of the street. Cheers Brian.
The block thing is true but not really why. Flash is erased in 4 KB sectors and written in pages, so you can’t patch bytes in place. Delta updates are still possible, the device rebuilds the new image from old image plus patch into a spare partition. It needs extra code on the device and a patch tool on the vendor’s side. Most small vendors don’t bother.
The safety bit you want to ask about is whether they have two OTA partitions. Then the new image goes into the inactive one and the old one is still there if it fails to boot.
OK, fair enough for 1. So what are people building with the documented parts?
Trailers spend time where there is no signal, so plan for that from day one. Keep the readings on the device with their own timestamps and send them when the link is back, or your demo chart will have gaps in exactly the wrong places.
Whatever else you do, keep copper and the ground plane away from under the antenna end of the module, and let the antenna hang over the board edge if you can.