FiPy unable to connect to T-Mobile NL (LTE-M)
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Hello,
I'm trying to connect to the LTE-M network of T-Mobile NL. But the FiPy is unable to connect to the network.
The simcard used in the FiPy is a special IoT Creators LTE-M simcard.
When I use the command AT+CPIN? it returns Ready.
To verify if the network is found the command AT+COPS=? is used, this returns 20416 what means that the network is found.
To verify the freqency band the command AT+SQNINS=0 is used, this returns the T-Mobile celltower on frequencyband 8.
To verify the operational capabilities the command AT+CFUN? is used, this returns 1.
The code used:
from network import LTE import time import socket lte = LTE() lte.attach(band=8, apn="iot.t-mobile.nl") print("attaching..",end='') while not lte.isattached(): time.sleep(0.25) print('.',end='') print(lte.send_at_cmd('AT!="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!")It returns:
DL SYNCHRO STATISTICS ===================== Synchro state : OFF PPU SIB1 ACQ watchdog : 0 Frequency Hypothesis RF (Hz) : 0 RSRP (dBm) : 0.00 RSRQ (dB) : 0.00 Channel estimation state (Cell-spec.) : LOW CINR Channel estimation state (UE-spec.) : LOW CINR Channel estimation state (MBSFN) : LOW CINR Channel estimation CINR : 0.00 Channel length : SHORT AGC AGC RX gain (dB) : 0.00 RX PSD BO (dBFs) : 0.00 RX PSD (dBm) : 0.00 Noise level RS (dBm) : 0.00 Digital gain (dB) : 0.00 CINR RS (dB) : 0.00 NARROWBANDS Last DL NB : 0 Last UL NB : 0 AFC Frequency offset RF (Hz) : 0 Frequency offset BB (Hz) : 0 PBCH MIB received quantity : 0 MIB timeout quantity : 0 OK attaching... SYSTEM FSM ========== +--------------------------+--------------------+ | FSM | STATE | +--------------------------+--------------------+ | RRC TOP FSM |SCANNING | | RRC SEARCH FSM |WAIT_CELL_ID | | RRC ACTIVE FSM |NULL | | PMM PLMN FSM |ANY_WAITCELL | | EMM MAIN FSM |NULL | | EMM AUTH FSM |KASME_DEFINED | | EMM CONN FSM |NULL | | EMM TAU FSM |NULL | | EMM TEST FSM |NULL | | ESM BEARER FSM |BEARER_NULL | | SMS MT FSM |IDLE | | SMS MO FSM |IDLE | | HP MAIN FSM |IDLE | | HP USIM FSM |READY | | HP SMS MO FSM |IDLE | | HP SMS MT FSM |IDLE | | HP CAT FSM |IDLE | +--------------------------+--------------------+ OK . SYSTEM FSM ========== +--------------------------+--------------------+ | FSM | STATE | +--------------------------+--------------------+ | RRC TOP FSM |SYNCING | | RRC SEARCH FSM |WAIT_SYNC | | RRC ACTIVE FSM |NULL | | PMM PLMN FSM |ANY_WAITCELL | | EMM MAIN FSM |NULL | | EMM AUTH FSM |KASME_DEFINED | | EMM CONN FSM |NULL | | EMM TAU FSM |NULL | | EMM TEST FSM |NULL | | ESM BEARER FSM |BEARER_NULL | | SMS MT FSM |IDLE | | SMS MO FSM |IDLE | | HP MAIN FSM |IDLE | | HP USIM FSM |READY | | HP SMS MO FSM |IDLE | | HP SMS MT FSM |IDLE | | HP CAT FSM |IDLE | +--------------------------+--------------------+ OK . SYSTEM FSM ========== +--------------------------+--------------------+ | FSM | STATE | +--------------------------+--------------------+ | RRC TOP FSM |CAMPED | | RRC SEARCH FSM |CAMPED_ANY | | RRC ACTIVE FSM |IDLE | | PMM PLMN FSM |ANY_CAMPED | | EMM MAIN FSM |NULL | | EMM AUTH FSM |KASME_DEFINED | | EMM CONN FSM |NULL | | EMM TAU FSM |NULL | | EMM TEST FSM |NULL | | ESM BEARER FSM |BEARER_NULL | | SMS MT FSM |IDLE | | SMS MO FSM |IDLE | | HP MAIN FSM |IDLE | | HP USIM FSM |READY | | HP SMS MO FSM |IDLE | | HP SMS MT FSM |IDLE | | HP CAT FSM |IDLE | +--------------------------+--------------------+ OKDoes anyone have any experience of connecting to the T-Mobile NL LTE-M network? I tried resetting multiple times and codes from the forum but i did not have any succes (so far).
Thanks,
Lars
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@Gijs I have exactly the same problem as described above (T-Mobile SIM etc.). Aparently you have assisted Lars outside this thread, but I'm curious if you found the solution.
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Could you contact me at support@pycom.io linking this forum thread, we might be able to help you further there!
Gijs
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Hello,
Thanks for the quick reaction!
After the update the RCC TOP FSM switches from Scanning to Syncing to Camped and back. It seems that it is stuck somewhere.
SYSTEM FSM ========== +--------------------------+--------------------+ | FSM | STATE | +--------------------------+--------------------+ | RRC TOP FSM |SCANNING | | RRC SEARCH FSM |WAIT_CELL_ID | | RRC ACTIVE FSM |NULL | | PMM PLMN FSM |ANY_WAITCELL | | EMM MAIN FSM |NULL | | EMM AUTH FSM |KASME_DEFINED | | EMM CONN FSM |NULL | | EMM TAU FSM |NULL | | EMM TEST FSM |NULL | | ESM BEARER FSM |BEARER_NULL | | SMS MT FSM |IDLE | | SMS MO FSM |IDLE | | LPP FSM |IDLE | | HP MAIN FSM |IDLE | | HP USIM FSM |READY | | HP SMS MO FSM |IDLE | | HP SMS MT FSM |IDLE | | HP CAT FSM |IDLE | +--------------------------+--------------------+ OK . SYSTEM FSM ========== +--------------------------+--------------------+ | FSM | STATE | +--------------------------+--------------------+ | RRC TOP FSM |SYNCING | | RRC SEARCH FSM |WAIT_SYNC | | RRC ACTIVE FSM |NULL | | PMM PLMN FSM |ANY_WAITCELL | | EMM MAIN FSM |NULL | | EMM AUTH FSM |KASME_DEFINED | | EMM CONN FSM |NULL | | EMM TAU FSM |NULL | | EMM TEST FSM |NULL | | ESM BEARER FSM |BEARER_NULL | | SMS MT FSM |IDLE | | SMS MO FSM |IDLE | | LPP FSM |IDLE | | HP MAIN FSM |IDLE | | HP USIM FSM |READY | | HP SMS MO FSM |IDLE | | HP SMS MT FSM |IDLE | | HP CAT FSM |IDLE | +--------------------------+--------------------+ OK . SYSTEM FSM ========== +--------------------------+--------------------+ | FSM | STATE | +--------------------------+--------------------+ | RRC TOP FSM |CAMPED | | RRC SEARCH FSM |CAMPED_ANY | | RRC ACTIVE FSM |IDLE | | PMM PLMN FSM |ANY_CAMPED | | EMM MAIN FSM |NULL | | EMM AUTH FSM |KASME_DEFINED | | EMM CONN FSM |NULL | | EMM TAU FSM |NULL | | EMM TEST FSM |NULL | | ESM BEARER FSM |BEARER_NULL | | SMS MT FSM |IDLE | | SMS MO FSM |IDLE | | LPP FSM |IDLE | | HP MAIN FSM |IDLE | | HP USIM FSM |READY | | HP SMS MO FSM |IDLE | | HP SMS MT FSM |IDLE | | HP CAT FSM |IDLE | +--------------------------+--------------------+ OKThis has been going on for more than an hour. Most of the time the device is Scanning.
Does anyone have any other suggestions?
Thanks,
Lars
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Hi,
Could you perhaps update the LTE modem firmware to the latest available version and try again? The update procedure is described here: https://docs.pycom.io/updatefirmware/ltemodem/. Shifting locations to get a better signal might help as well.
Let me know!