I’m evaluating a Boron LTE here in the States for a project that for a short period of time streams data at a few kBps up and down. In the process of prototyping with the internal SIM, I’ve noticed that if I send more than about ~1kBps (~8kbps) in both directions over UDP (in packets up to ~500 bytes) to my own host on the public internet I appear to be throttled, with my traffic being black-holed until I reboot the Boron. The Boron usually thinks it is successfully sending UDP packets as no errors are returned while things are black-holing.
It looks like according to the data sheet for the SARA-R410M the max data sheet is 375kbs up/300kbs down so I’m guessing this is either firmware throttled or carrier throttled. So:
- Does the Carrier/MVNO with the internal SIM throttle below the theoretical speed limit fo LTE-M? This would indicate I can switch to 3rd party carrier and perhaps get around this.
- Does DeviceOS throttle transmission somewhere? This would indicate I can compile my own firmware with modified throttling logic.