Can't connect Fipy via LTE NB-IoT to Pybytes

  • Hello there, I tried to connect via NB-IoT to as described in this article , later I tried out this tip after I had no success, but it's still complaining with the same error message that it cannot connect to the MQTT server.

    Connecting to COM13...
    WMAC: 807D3AC2E464
    Firmware: 1.18.2.r3
    Pybytes: 0.9.10
    Pybytes configuration read from /flash/pybytes_config.json
    Initialed watchdog for WiFi and LTE connection with timeout 660000 ms
    LTE init(carrier=standard, cid=1)
    LTE attach(band=8,, type=None)
    LTE connect()
    LTE is_connected()
    LTE connection established
    MQTTClient: Can't connect to MQTT server: ""
    MQTTClient: Can't connect to MQTT server: ""

    As a second connection preference
    was set to ["lte", "lora"]

    Any tips on how I could get this to work? Am I overlooking anything?

  • I was able to successfully connect via HTTPS to google and do a simple GET request, so it seemed. Though I don't do dabble around to often in network protocols. Would you have any suggestion for a safer way to determine whether our carrier supports UDP. The name of the carrier is 1NCE, btw.

  • administrators

    @weingami Are you sure the operator you are using allows TCP (MQTT) connections to external platforms?

    Most NB-IoT network carriers don't support TCP and only allow UDP/CoAP connections to their own internal platforms.

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