PYCOM FiPy does not attach to the Cellular Network - LTE Italy

Question

I have tried to connect to the internet using LTE but the network won't attach. I want to determine the proper carrier on my Fipy, I did not get any response, the list was empty.

The comand AT+CEREG?' response OK.

The firmware version that I have is LR5.1.1.0-47510

Does someone have any idea on how I could manage to attach to the network? Any previous experiences Thank you in advance.

`>>> from network import LTE
>>> lte=LTE()
>>> lte.send_at_cmd("AT+SQNCTM=?")
''
>>>

I have been running all variations of the default test program with any success

from network import LTE
import time
import socket

lte = LTE()
lte.attach()
print("attaching..",end='')
while not lte.isattached():
    time.sleep(0.25)
    print('.',end='')
    print(lte.send_at_cmd('AT!="fsm"'))         # get the System FSM
print("attached!")

lte.connect()
print("connecting [##",end='')
while not lte.isconnected():
    time.sleep(0.25)
    print('#',end='')
    #print(lte.send_at_cmd('AT!="showphy"'))
    print(lte.send_at_cmd('AT!="fsm"'))
print("] connected!")

The [fipy] tag is for the FiPy partial differential equation solver, not communications widget — jeguyer, Dec 01 '22 at 17:01
@jeguyer What do you mean by this? FiPy board suppose to provide 5 types of communication, in fact, we were able to use it with LoRa and Wi-Fi, but we need LTE to be able to send the data where there is no Wi-Fi coverage. — Liudmila Dobriakova, Dec 05 '22 at 14:04
I mean that the [fipy] tag on Stack Overflow is about about a piece of software called [FiPy](https://www.ctcms.nist.gov/fipy), not about the communications boards from [Pycom](https://pycom.io/?s=fipy). I know because I created the tag and our software used the name for years before Pycom did. — jeguyer, Dec 05 '22 at 18:02

score 0 · Accepted Answer · answered Mar 15 '23 at 07:35

If my findings are correct, you need to factory-reset the modem first!

You can do this by sending the corresponding AT-command like this: lte.send_at_cmd('AT+SQNSFACTORYRESET=?')

After this you need to reboot the device to complete the reset process!

The device should now attach to the network without issues.

PS: I know, Pycom offers a method .factory_reset() in its LTE-class, but it seems like it just crashes whenever used.

Also, see my answer in the Pycom forum

PYCOM FiPy does not attach to the Cellular Network - LTE Italy

1 Answers1