T-Mobile NB-IoT in the Netherlands? [SOLVED]

[Joop Susan]

Hello @paul-thornton,

It is failing to attach. Functions lte.imei() and lte.iccid() return sensible values. AT+CSQ returns 27,99.

>>> import sqnsupgrade
>>> sqnsupgrade.info()
<<< Welcome to the SQN3330 firmware updater [1.2.1] >>> 
>>> GPy with firmware version 1.20.0.rc4
Your modem is in application mode. Here is the current version:
UE6.0.0.0
LR6.0.0.0-40343

My test code:

import os
from network import LTE
import time

lte = None

def get_LTE():
    global lte
    if lte == None:
        lte = LTE()
    if lte.isconnected():
        return True
    lte.attach(band=8, apn="cdp.iot.t-mobile.nl")
    attempts = 0
    while not lte.isattached():
        time.sleep(5)
        attempts = attempts + 1
        print('Attaching...', attempts)
    print('LTE attach succeeded!')
    lte.connect()
    attempts = 0
    while not lte.isconnected():
        time.sleep(5)
        attempts = attempts + 1
        print('Connecting...', attempts)
    print('LTE connection succeeded!')
    return True

def end_LTE():
    global lte
    if lte == None:
        return
    print("Disonnecting LTE ... ")
    lte.disconnect()
    print("Detaching LTE ... ")
    lte.dettach()
    print("Shuttting down LTE...")
    lte.deinit()
    lte = None

def test_LTE():
    os.uname()
    get_LTE()
    time.sleep(60)
    end_lte()

if __name__ == "__main__":
    test_LTE()

After more than an hour it is still not attached.

The T-Mobile Netherlands IoT page only describes how to connect other platforms. (Link).

What can I try next?

[Paul Thornton]

Hey.

What issue are you having? Is it failing to attach, or attaching but failing to make any external connections?