do you have any thoughts about why they might be getting a NOSERVICE message?
I don't know in detail, but what I am missing in the example code is an AT command "AT+COPS" to manually register at the network. I did my tests with NB-IoT capable SIM cards by Vodafone (Germany) and 1NCE. So maybe it is the missing step to register at the network.
I just updated my MQTT via NB-IoT example a few days ago, you can see the sequence of AT commands there. Check it out at
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@Gordon
I don't know in detail, but what I am missing in the example code is an AT command "AT+COPS" to manually register at the network. I did my tests with NB-IoT capable SIM cards by Vodafone (Germany) and 1NCE. So maybe it is the missing step to register at the network.
I just updated my MQTT via NB-IoT example a few days ago, you can see the sequence of AT commands there. Check it out at
https://github.com/wklenk/rak8212-espruino-nb-iot/blob/master/data-logger-bg96-mqtt.js