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

[weingami]

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, apn=iot.1nce.net, type=None)
LTE connect()
LTE is_connected()
LTE connection established
MQTTClient: Can't connect to MQTT server: "mqtt.pybytes.pycom.io"
MQTTClient: Can't connect to MQTT server: "mqtt.pybytes.pycom.io"

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

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

[weingami]

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.

[Xykon]

@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.