Welcome to the Pycom forum Forum
    • \[\[global:header.categories\]\]
    • \[\[global:header.recent\]\]
    • \[\[global:header.tags\]\]
    • \[\[global:header.popular\]\]
    • Login

    Explore Pybytes | Official Documentation | Report a Firmware Bug/Issue | GitHub

    FiPy trouble with CatM1 AND NBIoT

    Scheduled Pinned Locked Moved FiPy
    18 Posts 4 Posters 261 Views 5 Watching
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • C Offline
      claus @barryjump
      last edited by

      @barryjump These are the states I get after a lte.reset():

      init lte
      reset lte
      attaching..
       ('SCANNING', 'WAIT_CELL_ID').
       ('CAMPING', 'WAIT_SIB').
       ('CAMPING', 'WAIT_SIBX').
       ('CAMPING', 'WAIT_SIB').
       ('SYNCING', 'WAIT_SYNC')....
       ('CAMPING', 'WAIT_SIB').
       ('CAMPING', 'WAIT_SIBX')...
       ('CONNECTING', 'CAMPED')......
       ('CONNECTED', 'CAMPED')........................attached!
      

      Your states look exactly like what I had before changing the modem firmware. The docs say

      If the system returns multiple times from SYNCING to CAMPED, check the network availability, simcard placement and / or the firmware version. 
      

      You have checked the other two hints I guess? Has 1oT provided you with the band and apn parameters?

      B 2 Replies Last reply Reply Quote 0
      • B Offline
        barryjump @claus
        last edited by

        @claus I did check both, but I'm going to double and triple check now. Will report back.
        Thanks for helping!

        1 Reply Last reply Reply Quote 0
        • B Offline
          barryjump @claus
          last edited by barryjump

          @claus Hey I tripped checked sim card placement and firmware. Regarding signal and network availability, I found this reference elsewhere on this forum.

          https://usatcorp.com/faqs/understanding-lte-signal-strength-values/

          If this reference doc is correct, my results (at the time FSM shows Connecting) show that I while don't have great signal, I should have enough to reach a tower.

          RSRQ (dB) : -10.82 (-3 Excellent to -19 Poor)
          RSRP (dBm) : -104.80 (-44 Excellent to -140 Poor)
          CINR : 10.31 (12.5 Excellent to 7 Poor)

          SYSTEM FSM
          ==========
              +--------------------------+--------------------+
              |            FSM           |        STATE       |
              +--------------------------+--------------------+
              | RRC TOP FSM              |CONNECTING          |
              | RRC SEARCH FSM           |CAMPED              |
              | RRC ACTIVE FSM           |WAIT_SMC            |
              | PMM PLMN FSM             |NORM_CAMPED         |
              | EMM MAIN FSM             |REGISTERED_INIT     |
              | EMM AUTH FSM             |NULL                |
              | EMM CONN FSM             |AS_ESTABLISHED      |
              | EMM TAU FSM              |NULL                |
              | EMM TEST FSM             |NULL                |
              | ESM BEARER FSM           |BEARER_NULL_PENDING_ACTIVE|
              | 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
          .Sent to modem: 'AT!="showphy"'
          DL SYNCHRO STATISTICS
          =====================
              Synchro state                         : CELL_ACQUIRED
              PPU SIB1 ACQ watchdog                 : 0
              Frequency Hypothesis RF  (Hz)         : 0
              RSRP (dBm)                            : -104.80
              RSRQ  (dB)                            : -10.82
              Channel estimation state (Cell-spec.) : HIGH CINR
              Channel estimation state (UE-spec.)   : LOW CINR
              Channel estimation state (MBSFN)      : LOW CINR
              Channel estimation CINR               : 10.31
              Channel length                        : SHORT
            AGC
              AGC RX gain (dB)                      : 59.51
              RX PSD BO (dBFs)                      : -21.19
              RX PSD (dBm)                          : -107.63
              Noise level RS (dBm)                  : -114.59
              Digital gain (dB)                     : 11.53
              CINR RS (dB)                          : 9.79
            NARROWBANDS
              Last DL NB                            : 0
              Last UL NB                            : N/A
            AFC
              Frequency offset RF  (Hz)             : -492
              Frequency offset BB  (Hz)             : 0
            PBCH
              MIB received quantity                 : 49
              MIB timeout quantity                  : 0
          OK
          Sent to modem: 'AT!="fsm"'
          SYSTEM FSM
          ==========
              +--------------------------+--------------------+
              |            FSM           |        STATE       |
              +--------------------------+--------------------+
              | RRC TOP FSM              |CONNECTING          |
              | RRC SEARCH FSM           |CAMPED              |
              | RRC ACTIVE FSM           |WAIT_SMC            |
              | PMM PLMN FSM             |NORM_CAMPED         |
              | EMM MAIN FSM             |REGISTERED_INIT     |
              | EMM AUTH FSM             |KASME_DEFINED       |
              | EMM CONN FSM             |AS_ESTABLISHED      |
              | EMM TAU FSM              |NULL                |
              | EMM TEST FSM             |NULL                |
              | ESM BEARER FSM           |BEARER_NULL_PENDING_ACTIVE|
              | 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
          .Sent to modem: 'AT!="showphy"'
          DL SYNCHRO STATISTICS
          =====================
              Synchro state                         : SIB1_ACQ
              PPU SIB1 ACQ watchdog                 : 0
              Frequency Hypothesis RF  (Hz)         : 0
              RSRP (dBm)                            : -104.71
              RSRQ  (dB)                            : -11.23
              Channel estimation state (Cell-spec.) : HIGH CINR
              Channel estimation state (UE-spec.)   : LOW CINR
              Channel estimation state (MBSFN)      : LOW CINR
              Channel estimation CINR               : 11.44
              Channel length                        : SHORT
            AGC
              AGC RX gain (dB)                      : 59.51
              RX PSD BO (dBFs)                      : -20.95
              RX PSD (dBm)                          : -107.41
              Noise level RS (dBm)                  : -114.74
              Digital gain (dB)                     : 11.31
              CINR RS (dB)                          : 10.03
            NARROWBANDS
              Last DL NB                            : Central
              Last UL NB                            : N/A
            AFC
              Frequency offset RF  (Hz)             : -493
              Frequency offset BB  (Hz)             : 0
            PBCH
              MIB received quantity                 : 56
              MIB timeout quantity                  : 0
          OK
          Sent to modem: 'AT!="fsm"'
          SYSTEM FSM
          ==========
              +--------------------------+--------------------+
              |            FSM           |        STATE       |
              +--------------------------+--------------------+
              | RRC TOP FSM              |SYNCING             |
              | RRC SEARCH FSM           |WAIT_SYNC           |
              | RRC ACTIVE FSM           |NULL                |
              | PMM PLMN FSM             |NORM_CAMPED         |
              | EMM MAIN FSM             |NULL                |
              | EMM AUTH FSM             |NULL                |
              | 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
          .Sent to modem: 'AT!="showphy"'
          DL SYNCHRO STATISTICS
          =====================
              Synchro state                         : FRAME_UPDATE
              PPU SIB1 ACQ watchdog                 : 0
              Frequency Hypothesis RF  (Hz)         : 0
              RSRP (dBm)                            : -21474836.00
              RSRQ  (dB)                            : -11.23
              Channel estimation state (Cell-spec.) : HIGH CINR
              Channel estimation state (UE-spec.)   : LOW CINR
              Channel estimation state (MBSFN)      : LOW CINR
              Channel estimation CINR               : 7.97
              Channel length                        : SHORT
            AGC
              AGC RX gain (dB)                      : 59.51
              RX PSD BO (dBFs)                      : -21.32
              RX PSD (dBm)                          : -110.56
              Noise level RS (dBm)                  : -128.24
              Digital gain (dB)                     : 5.49
              CINR RS (dB)                          : 10.03
            NARROWBANDS
              Last DL NB                            : Central
              Last UL NB                            : N/A
            AFC
              Frequency offset RF  (Hz)             : -483
              Frequency offset BB  (Hz)             : 0
            PBCH
              MIB received quantity                 : 70
              MIB timeout quantity                  : 0
          OK
          
          1 Reply Last reply Reply Quote 0
          • G Offline
            Gijs
            last edited by

            Hi,
            So it seems you are connecting (which is good!) but then immediately being rejected by the network because of some settings mismatch probably. There could be several causes for this error (mismatch in APN, simcard, sudden loss of signal etc.)

            B 1 Reply Last reply Reply Quote 0
            • B Offline
              barryjump @Gijs
              last edited by barryjump

              @Gijs this is my code, I've tried several different APNs, but perhaps I've set this up wrong? One thing I may not be handling properly is the band and carrier, but that is a bit strange considering we've been testing MVNOs (like Hologram, Twilio, Soracom, etc.) that hop different carriers with different bands. I've left the band unspecified as a result - perhaps thats incorrect.

              ######################################
              #           LTE Setup
              ######################################
              
              lte = LTE()
              apn = "terminal"  ## per https://1ot.mobi
              band = "None"
              iccid = lte.iccid()
              imei = lte.imei()
              
              
              def send_at_cmd_pretty(cmd):
                  response = lte.send_at_cmd(cmd).split('\r\n')
                  print('Sent to modem: \'{}\''.format(cmd))
                  for line in response:
                      if line.strip() != '':
                          print(line)
              
              # MODEM DEBUG
              send_at_cmd_pretty('ATI1')                                      # retrieve modem firmware
              send_at_cmd_pretty('AT!="showver"')                             # retrieve modem firmware
              send_at_cmd_pretty('AT!="RRC:setDbgPerm full"')
              send_at_cmd_pretty('AT!="RRC:showcaps"')
              time.sleep(5)
              send_at_cmd_pretty('AT+SQNCTM?')
              
              def lteconnect():
                  print("Attempting LTE connect with:")
                  print("APN: %s" % apn)
                  print('IMEI ', lte.imei()[:5] + '*' * 9)
                  print('ICCID ', lte.iccid()[:5] + '*' * 14)
                  time.sleep(3)
              
                  # Initialize the modem
                  lte.init()
              
                  # Attach the modem
                  lte.attach(apn="terminal") 
                  print("attaching..",end='')
              
                  while not lte.isattached():
                      # JFD time.delay(0.25)
                      pycom.rgbled(0x500000)
                      utime.sleep_ms(25)
                      print('.',end='')
                      send_at_cmd_pretty('AT!="showphy"')
                      send_at_cmd_pretty('AT!="fsm"')
                      #utime.sleep_ms(500)
                      #print(lte.send_at_cmd('print'))
                      utime.sleep_ms(500)
              
                  pycom.rgbled(0x005000)
                  print("attached!")
              
                  lte.connect()
                  print("connecting [##",end='')
                  while not lte.isconnected():
                      # JFD time.sleep(0.25)
                      utime.sleep_ms(250)
                      print('#',end='')
                      #print(lte.send_at_cmd('AT!="showphy"'))
                      print(lte.send_at_cmd('AT!="fsm"'))
                      print(lte.send_at_cmd("ATI"))
                  print("] connected!")
              
                  # JFD Add delay
                  utime.sleep_ms(250)
              
                  # Ping Google server to test  
                  print(usocket.getaddrinfo('google.com', 80))  
                  print("Waiting for 60 seconds before disconnecting ...")
                  time.sleep(60)
                  print("OK, disconnecting now.")
                  lte.deinit()
                  #now we can safely machine.deepsleep()
              
              1 Reply Last reply Reply Quote 0
              • B Offline
                barryjump
                last edited by

                Quick update, I brought my FiPy on the road and parked right beneath a cell tower to see if perhaps my problem originated from poor signal.

                As I mentioned before, my original signal reported as follows:
                RSRQ (dB) : -10.82 (-3 Excellent to -19 Poor)
                RSRP (dBm) : -104.80 (-44 Excellent to -140 Poor)
                CINR : 10.31 (12.5 Excellent to 7 Poor)

                Underneath the tower I was seeing excellent signal stats:
                RSRQ (dB) : -6.2 (-3 Excellent to -19 Poor)
                RSRP (dBm) : -59.02 (-44 Excellent to -140 Poor)
                CINR : 28.22 (12.5 Excellent to 7 Poor)

                Unfortunately that did not resolve the issue, so all I can imagine I'm left with is some configuration problems with the Band, APN, or Network settings in lte.init() and lte.attach(). Perhaps @Gijs you have some suggestions?

                Thanks!

                C 1 Reply Last reply Reply Quote 0
                • C Offline
                  claus @barryjump
                  last edited by

                  @barryjump Your signal strength should not be a problem, I have RSRP around -115 and RSRQ at -15 and I can attach. Could you please check the following: Print the output of the AT command "AT+CEREG?" after lte.init(). If the first integer value is different from "2" ( say for example "+CEREG: 0,2" - the first value is "0") then include a "AT+CEREG=2" after lte.init(). Your "AT+CEREG?" should now give "+CEREG: 2,x". Now try to attach.

                  B 2 Replies Last reply Reply Quote 0
                  • B Offline
                    barryjump @claus
                    last edited by

                    @claus said in FiPy trouble with CatM1 AND NBIoT:

                    AT+CEREG?

                    Thanks @claus running that check showed the following:

                    Sent to modem: 'AT+CEREG?'
                    +CEREG: 2,0
                    OK
                    ********************
                    

                    Which means it was already configured with that value. I did notice it got to connecting a bit faster than usual this time, but same problem: from connecting to searching almost immediately. :(

                    Pybytes configuration read from /flash/pybytes_config.json
                    Not starting Pybytes as auto-start is disabled
                    Sent to modem: 'ATI1'
                    UE5.0.0.0d
                    LR5.1.1.0-41065
                    OK
                    Sent to modem: 'AT!="showver"'
                    SYSTEM VERSION
                    ==============
                      FIRMWARE VERSION
                        Bootloader0  : 5.1.1.0 [39529]
                        Bootloader1* : 5.1.1.0 [41065]
                        Bootloader2  : 6.0.0.0 [41019]
                        NV Info      : 1.1,0,0
                        Software     : 5.1.1.0 [41065] by robot-soft at 2018-12-17 13:03:40
                        UE           : 5.0.0.0d
                      COMPONENTS
                        ZSP0         : 1.0.99-13616
                        ZSP1         : 1.0.99-12376
                    OK
                    Sent to modem: 'AT!="RRC:setDbgPerm full"'
                    OK
                    Sent to modem: 'AT!="RRC:showcaps"'
                    == CAPS config =============================
                      .Lock UE on SRV band    : false
                      .MFBI support           : true
                      .TM8 TDD support        : false
                    ============================================
                    == CAPS ====================================
                      . access stratum: R13
                      . catM          : 1
                      . nb-IoT        : 0
                    -- EUTRA bands --
                      . supported     : 66/28/26/25/20/19/18/17/14/13/12/8/5/4/3/2/1
                      . board         : 1/2/3/4/5/8/12/13/14/17/18/19/20/25/26/28/66
                      . admin         : 
                      . pending admin : 
                    -- EUTRA carriers --
                      . admin         : 
                      . pending admin : 
                    ============================================
                    OK
                    Sent to modem: 'AT+SQNCTM?'
                    +SQNCTM: standard
                    OK
                    Booting up... 
                    10
                    9
                    8
                    7
                    6
                    5
                    4
                    3
                    2
                    1
                    No user input detected, starting
                    Attempting LTE connect with:
                    APN: terminal
                    IMEI  35434*********
                    ICCID  89310**************
                    Sent to modem: 'AT+CEREG?'
                    +CEREG: 2,0
                    OK
                    ********************
                    attaching...Sent to modem: 'AT!="showphy"'
                    DL SYNCHRO STATISTICS
                    =====================
                        Synchro state                         : CELL_ACQUIRED
                        PPU SIB1 ACQ watchdog                 : 0
                        Frequency Hypothesis RF  (Hz)         : 0
                        RSRP (dBm)                            : -108.60
                        RSRQ  (dB)                            : -10.81
                        Channel estimation state (Cell-spec.) : HIGH CINR
                        Channel estimation state (UE-spec.)   : LOW CINR
                        Channel estimation state (MBSFN)      : LOW CINR
                        Channel estimation CINR               : 5.82
                        Channel length                        : SHORT
                      AGC
                        AGC RX gain (dB)                      : 59.61
                        RX PSD BO (dBFs)                      : -21.00
                        RX PSD (dBm)                          : -110.93
                        Noise level RS (dBm)                  : -114.30
                        Digital gain (dB)                     : 14.73
                        CINR RS (dB)                          : 5.70
                      NARROWBANDS
                        Last DL NB                            : 3
                        Last UL NB                            : N/A
                      AFC
                        Frequency offset RF  (Hz)             : -475
                        Frequency offset BB  (Hz)             : 0
                      PBCH
                        MIB received quantity                 : 66
                        MIB timeout quantity                  : 0
                    OK
                    Sent to modem: 'AT!="fsm"'
                    SYSTEM FSM
                    ==========
                        +--------------------------+--------------------+
                        |            FSM           |        STATE       |
                        +--------------------------+--------------------+
                        | RRC TOP FSM              |CONNECTING          |
                        | RRC SEARCH FSM           |CAMPED              |
                        | RRC ACTIVE FSM           |WAIT_SMC            |
                        | PMM PLMN FSM             |NORM_CAMPED         |
                        | EMM MAIN FSM             |REGISTERED_INIT     |
                        | EMM AUTH FSM             |WAITING_SIM_CONFIRM |
                        | EMM CONN FSM             |AS_ESTABLISHED      |
                        | EMM TAU FSM              |NULL                |
                        | EMM TEST FSM             |NULL                |
                        | ESM BEARER FSM           |BEARER_NULL_PENDING_ACTIVE|
                        | 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
                    .Sent to modem: 'AT!="showphy"'
                    DL SYNCHRO STATISTICS
                    =====================
                        Synchro state                         : CELL_ACQUIRED
                        PPU SIB1 ACQ watchdog                 : 0
                        Frequency Hypothesis RF  (Hz)         : 0
                        RSRP (dBm)                            : -108.99
                        RSRQ  (dB)                            : -11.66
                        Channel estimation state (Cell-spec.) : LOW CINR
                        Channel estimation state (UE-spec.)   : LOW CINR
                        Channel estimation state (MBSFN)      : LOW CINR
                        Channel estimation CINR               : 5.14
                        Channel length                        : SHORT
                      AGC
                        AGC RX gain (dB)                      : 59.61
                        RX PSD BO (dBFs)                      : -20.81
                        RX PSD (dBm)                          : -109.95
                        Noise level RS (dBm)                  : -114.09
                        Digital gain (dB)                     : 13.75
                        CINR RS (dB)                          : 5.10
                      NARROWBANDS
                        Last DL NB                            : 3
                        Last UL NB                            : N/A
                      AFC
                        Frequency offset RF  (Hz)             : -492
                        Frequency offset BB  (Hz)             : 0
                      PBCH
                        MIB received quantity                 : 66
                        MIB timeout quantity                  : 0
                    OK
                    Sent to modem: 'AT!="fsm"'
                    SYSTEM FSM
                    ==========
                        +--------------------------+--------------------+
                        |            FSM           |        STATE       |
                        +--------------------------+--------------------+
                        | RRC TOP FSM              |CONNECTING          |
                        | RRC SEARCH FSM           |CAMPED              |
                        | RRC ACTIVE FSM           |WAIT_SMC            |
                        | PMM PLMN FSM             |NORM_CAMPED         |
                        | EMM MAIN FSM             |REGISTERED_INIT     |
                        | EMM AUTH FSM             |KASME_DEFINED       |
                        | EMM CONN FSM             |AS_ESTABLISHED      |
                        | EMM TAU FSM              |NULL                |
                        | EMM TEST FSM             |NULL                |
                        | ESM BEARER FSM           |BEARER_NULL_PENDING_ACTIVE|
                        | 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
                    .Sent to modem: 'AT!="showphy"'
                    DL SYNCHRO STATISTICS
                    =====================
                        Synchro state                         : CELL_SEARCH
                        PPU SIB1 ACQ watchdog                 : 0
                        Frequency Hypothesis RF  (Hz)         : 0
                        RSRP (dBm)                            : -21474836.00
                        RSRQ  (dB)                            : -11.97
                        Channel estimation state (Cell-spec.) : LOW CINR
                        Channel estimation state (UE-spec.)   : LOW CINR
                        Channel estimation state (MBSFN)      : LOW CINR
                        Channel estimation CINR               : 4.30
                        Channel length                        : SHORT
                      AGC
                        AGC RX gain (dB)                      : 59.59
                        RX PSD BO (dBFs)                      : -20.54
                        RX PSD (dBm)                          : -105.79
                        Noise level RS (dBm)                  : -128.24
                        Digital gain (dB)                     : 5.41
                        CINR RS (dB)                          : -0.01
                      NARROWBANDS
                        Last DL NB                            : Central
                        Last UL NB                            : 0
                      AFC
                        Frequency offset RF  (Hz)             : -480
                        Frequency offset BB  (Hz)             : 0
                      PBCH
                        MIB received quantity                 : 73
                        MIB timeout quantity                  : 0
                    OK
                    Sent to modem: 'AT!="fsm"'
                    SYSTEM FSM
                    ==========
                        +--------------------------+--------------------+
                        |            FSM           |        STATE       |
                        +--------------------------+--------------------+
                        | RRC TOP FSM              |SYNCING             |
                        | RRC SEARCH FSM           |WAIT_SYNC           |
                        | RRC ACTIVE FSM           |NULL                |
                        | PMM PLMN FSM             |NORM_CAMPED         |
                        | EMM MAIN FSM             |NULL                |
                        | EMM AUTH FSM             |NULL                |
                        | 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
                    .Sent to modem: 'AT!="showphy"'
                    DL SYNCHRO STATISTICS
                    =====================
                        Synchro state                         : RSRP
                        PPU SIB1 ACQ watchdog                 : 0
                        Frequency Hypothesis RF  (Hz)         : -1000
                        RSRP (dBm)                            : -21474836.00
                        RSRQ  (dB)                            : -11.97
                        Channel estimation state (Cell-spec.) : HIGH CINR
                        Channel estimation state (UE-spec.)   : LOW CINR
                        Channel estimation state (MBSFN)      : LOW CINR
                        Channel estimation CINR               : 7.20
                        Channel length                        : SHORT
                      AGC
                        AGC RX gain (dB)                      : 59.59
                        RX PSD BO (dBFs)                      : -19.92
                        RX PSD (dBm)                          : -103.98
                        Noise level RS (dBm)                  : -128.24
                        Digital gain (dB)                     : 7.80
                        CINR RS (dB)                          : -0.01
                      NARROWBANDS
                        Last DL NB                            : Central
                        Last UL NB                            : 0
                      AFC
                        Frequency offset RF  (Hz)             : 513
                        Frequency offset BB  (Hz)             : 0
                      PBCH
                        MIB received quantity                 : 92
                        MIB timeout quantity                  : 0
                    OK
                    Sent to modem: 'AT!="fsm"'
                    SYSTEM FSM
                    ==========
                        +--------------------------+--------------------+
                        |            FSM           |        STATE       |
                        +--------------------------+--------------------+
                        | RRC TOP FSM              |SCANNING            |
                        | RRC SEARCH FSM           |WAIT_CELL_ID        |
                        | RRC ACTIVE FSM           |NULL                |
                        | PMM PLMN FSM             |NORM_CAMPED         |
                        | EMM MAIN FSM             |NULL                |
                        | EMM AUTH FSM             |NULL                |
                        | 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
                    .Sent to modem: 'AT!="showphy"'
                    DL SYNCHRO STATISTICS
                    =====================
                        Synchro state                         : CELL_SEARCH
                        PPU SIB1 ACQ watchdog                 : 0
                        Frequency Hypothesis RF  (Hz)         : -1000
                        RSRP (dBm)                            : -21474836.00
                        RSRQ  (dB)                            : -11.97
                        Channel estimation state (Cell-spec.) : LOW CINR
                        Channel estimation state (UE-spec.)   : LOW CINR
                        Channel estimation state (MBSFN)      : LOW CINR
                        Channel estimation CINR               : 1.74
                        Channel length                        : SHORT
                      AGC
                        AGC RX gain (dB)                      : 55.73
                        RX PSD BO (dBFs)                      : -33.26
                        RX PSD (dBm)                          : -123.33
                        Noise level RS (dBm)                  : -128.24
                        Digital gain (dB)                     : 9.27
                        CINR RS (dB)                          : -0.01
                      NARROWBANDS
                        Last DL NB                            : Central
                        Last UL NB                            : 0
                      AFC
                        Frequency offset RF  (Hz)             : -421
                        Frequency offset BB  (Hz)             : 0
                      PBCH
                        MIB received quantity                 : 116
                        MIB timeout quantity                  : 0
                    OK
                    Sent to modem: 'AT!="fsm"'
                    SYSTEM FSM
                    ==========
                        +--------------------------+--------------------+
                        |            FSM           |        STATE       |
                        +--------------------------+--------------------+
                        | RRC TOP FSM              |SCANNING            |
                        | RRC SEARCH FSM           |WAIT_CELL_ID        |
                        | RRC ACTIVE FSM           |NULL                |
                        | PMM PLMN FSM             |NORM_CAMPED         |
                        | EMM MAIN FSM             |NULL                |
                        | EMM AUTH FSM             |NULL                |
                        | 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
                    
                    1 Reply Last reply Reply Quote 0
                    • B Offline
                      barryjump @claus
                      last edited by

                      @claus Would you be willing to share your main.py here? I'm increasingly thinking that I have the band, apn, or carrier setup wrong.

                      C 1 Reply Last reply Reply Quote 0
                      • C Offline
                        claus @barryjump
                        last edited by

                        @barryjump For testing the attach process I use https://github.com/clausdenk/fipy-ltesignal. You should be able to use it directly by commenting the dnsserver calls at the top of the file and adjusting ATTACH_PARAMETERS. It should be ok to only specify the apn, the band should be detected automatically by the modem. If you know the band it probably speeds up the process though. I get outputs similar to

                         ('SCANNING', 'WAIT_CELL_ID').
                         ('CAMPING', 'WAIT_SIBX')..
                         ('CAMPING', 'WAIT_SIB').
                         ('SYNCING', 'WAIT_SYNC').
                         ('CAMPING', 'WAIT_SIB').
                         ('SYNCING', 'WAIT_SYNC').
                         ('CAMPING', 'WAIT_SIB').
                         ('SYNCING', 'WAIT_SYNC').
                         ('CAMPING', 'WAIT_SIBX').........
                         ('CONNECTING', 'CAMPED')...
                         ('CONNECTED', 'CAMPED')......attached!
                        rsrp,rsrq,<rsrp>,<rsrq>: -113.33 -15.89 -113.33 -15.89
                        rsrp,rsrq,<rsrp>,<rsrq>: -113.19 -15.96 -113.26 -15.925
                        ...
                        

                        I just had a problem with the CEREG setting !=2 and setting it to 2 fixed it for me. A pity it does not in your case.

                        B 2 Replies Last reply Reply Quote 2
                        • B Offline
                          barryjump @claus
                          last edited by

                          @claus Thanks for your help! I'll give your code a shot

                          1 Reply Last reply Reply Quote 0
                          • B Offline
                            barryjump @claus
                            last edited by

                            @claus I had high hopes! Unfortunately I'm seeing the same. Thanks for all your help!

                            Starting ..
                            rsrp [ -122.8 , -92.80001 ] center: -107.8
                            rsrq [ -22.2 , -7.2 ] center: -14.7
                            init lte
                            reset lte
                            cereg ['2', '0']
                            attaching..
                            .
                             ('STOPPED', 'NULL').
                             ('SCANNING', 'WAIT_CELL_ID')...
                             ('SYNCING', 'WAIT_SYNC')...........
                             ('CAMPING', 'WAIT_SIBX').
                             ('CONNECTING', 'CAMPED').....
                             ('SYNCING', 'WAIT_SYNC')....
                             ('SCANNING', 'WAIT_CELL_ID')..
                             ('CAMPING', 'WAIT_SIB').
                             ('SCANNING', 'WAIT_RSSI')..........................................
                             ('SCANNING', 'WAIT_CELL_ID').........
                             ('CAMPING', 'WAIT_SIB').
                             ('SYNCING', 'WAIT_SYNC').........
                             ('CONNECTING', 'CAMPED').....
                             ('SYNCING', 'WAIT_SYNC').
                             ('SCANNING', 'WAIT_CELL_ID').
                             ('SYNCING', 'WAIT_SYNC')....
                             ('SCANNING', 'WAIT_CELL_ID').
                             ('SYNCING', 'WAIT_SYNC').
                             ('SCANNING', 'WAIT_RSSI')..........................................
                             ('SCANNING', 'WAIT_CELL_ID').........
                             ('SYNCING', 'WAIT_SYNC').....
                             ('CONNECTING', 'CAMPED')......
                             ('CAMPING', 'WAIT_SIB').
                             ('SYNCING', 'WAIT_SYNC')..
                             ('SCANNING', 'WAIT_CELL_ID')...
                             ('SYNCING', 'WAIT_SYNC')..
                             ('CAMPING', 'WAIT_SIB').
                             ('SYNCING', 'WAIT_SYNC').
                             ('SCANNING', 'WAIT_RSSI')..........................................
                             ('SCANNING', 'WAIT_CELL_ID').........
                             ('SYNCING', 'WAIT_SYNC').
                             ('SCANNING', 'WAIT_CELL_ID')..
                             ('SYNCING', 'WAIT_SYNC').....
                             ('SCANNING', 'WAIT_RSSI').........................................
                             ('SCANNING', 'WAIT_CELL_ID')..........
                             ('SYNCING', 'WAIT_SYNC')..
                             ('CAMPING', 'WAIT_SIB').
                             ('CONNECTING', 'CAMPED').
                             ('SCANNING', 'WAIT_CELL_ID').....
                             ('SYNCING', 'WAIT_SYNC')....
                             ('CONNECTING', 'CAMPED').
                             ('SCANNING', 'WAIT_CELL_ID')...
                             ('SYNCING', 'WAIT_SYNC')...
                             ('CAMPING', 'WAIT_SIB').
                             ('SYNCING', 'WAIT_SYNC')..
                             ('SCANNING', 'WAIT_RSSI')..........................................
                             ('SCANNING', 'WAIT_CELL_ID').......
                             ('SYNCING', 'WAIT_SYNC').
                             ('CAMPING', 'WAIT_SIB')...
                             ('CAMPING', 'WAIT_SIBX').
                             ('CAMPED', 'CAMPED_ANY').........
                             ('SCANNING', 'WAIT_CELL_ID')..
                             ('CAMPING', 'WAIT_SIB').
                             ('SYNCING', 'WAIT_SYNC')...
                             ('SCANNING', 'WAIT_RSSI')..........................................
                             ('SCANNING', 'WAIT_CELL_ID').......
                             ('SYNCING', 'WAIT_SYNC').....
                             ('CAMPED', 'CAMPED_ANY')............
                             ('SCANNING', 'WAIT_CELL_ID').
                             ('SYNCING', 'WAIT_SYNC').
                             ('SCANNING', 'WAIT_RSSI')..........................................
                             ('SCANNING', 'WAIT_CELL_ID').......
                             ('SYNCING', 'WAIT_SYNC')...
                             ('CAMPING', 'WAIT_SIB')..
                             ('CAMPING', 'WAIT_SIBX').
                             ('CAMPED', 'CAMPED_ANY')............
                             ('SCANNING', 'WAIT_CELL_ID').
                             ('SYNCING', 'WAIT_SYNC')..
                             ('CAMPING', 'WAIT_SIB').
                             ('SCANNING', 'WAIT_RSSI')..........................................
                             ('SCANNING', 'WAIT_CELL_ID')........
                             ('CAMPING', 'WAIT_SIB').
                             ('SYNCING', 'WAIT_SYNC')......
                             ('CAMPED', 'CAMPED_ANY')...........
                             ('RESEL', 'WAIT_SIB').
                             ('RESEL', 'WAIT_CELL_ID')..
                             ('RESEL', 'WAIT_SYNC').
                             ('CAMPED', 'CAMPED_ANY').................................
                            

                            Perhaps there is a deeper issue with the modem firmware that only Pycom can help diagnose. @Gijs or @administrators Can you recommend some next steps to diagnose my problems?

                            1 Reply Last reply Reply Quote 0
                            • G Offline
                              Gijs
                              last edited by

                              Hi,
                              Thanks @claus for the great advice!~
                              My knowledge of the whole LTE thing only goes as far as the guide in the documentation unfortunately. I know we are working on publishing new LTE modem firmwares (hang tight!) but I'm not sure that will solve the issue here (we did have some succes with a beta NB-IoT firmware for other customers, you could contact me at support@pycom.io and I could send it to you!)

                              Gijs

                              B 1 Reply Last reply Reply Quote 0
                              • B Offline
                                barryjump @Gijs
                                last edited by

                                @Gijs Thanks. Emailed you just now.

                                Meantime, I don't want to give up hope as this user seems to have made this work somehow:

                                https://stackoverflow.com/questions/62791167/how-connect-to-lte-cell-network-with-pycom-fipy

                                1 Reply Last reply Reply Quote 0
                                • R Offline
                                  razvan
                                  last edited by

                                  Hi, were you able to resolve this issue? Thanks.

                                  1 Reply Last reply Reply Quote 0

                                  Hello! It looks like you're interested in this conversation, but you don't have an account yet.

                                  Getting fed up of having to scroll through the same posts each visit? When you register for an account, you'll always come back to exactly where you were before, and choose to be notified of new replies (either via email, or push notification). You'll also be able to save bookmarks and upvote posts to show your appreciation to other community members.

                                  With your input, this post could be even better 💗

                                  Register Login
                                  • 1 / 1
                                  • First post
                                    Last post

                                  Pycom on Twitter

                                  Pycom