LTE -NB connection issues



  • Do anyone had success with keeping a stable NB-IoT attachment through a sleep cycle.
    I have previously succsessfully connected to the Telenor NB-IoT network, but are not able to do so suddenly. Further on I'm trying to understand how to get a stable connection after a deep sleep, using the py.go_to_sleep(False) command with the pytrack.

    As far as I understand this command should keep the attachment to the network through a deep sleep cycle. The attachment is kept sometimes but not often enough to be able to use. Updated to newest firmware.

    NB-IoT Firmware: (lte.send_at_cmd('ATI1') )
    UE6.0.0.0
    LR6.0.0.0-38729

    Minimum example code:

    from network import LTE
    import time
    import machine
    
    lte = LTE()
    lte.init()
    #lte.reset()
    
    lte.attach(band=20, apn="mda.ee")
    i = 0
    while not (lte.isattached() or i > 15):
        time.sleep(1)
        i=i+1
        print("", i, " seconds passed")
    if i > 15:
        lte.reset()
        machine.reset()
    lte.connect()       # start a data session and obtain an IP address
    
    while not lte.isconnected():
        time.sleep(1)
    print("Connected")
    

 

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