Trying to connect to LTE-M1
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I am trying to connect to the local KPN network. I found two networks in my area on band 20. KPN and Vodafone. I have a KPN-sim, so i tried to set the code to KPN with AT+COPS:2 etc. But when i try lte.isattach() it constantly give False. I tried to force register to a network with 'AT+COPS=1,2,"20408"' but this gives an error. Also the forced network disappears from the found networks in the erea. As far as i know KPN network is supported, it is also listed in 'AT+COPN'. The output can be find in the comments. I have tried waiting for 5-10 min with a while loop after the attach, but still no attaching happening.
Who could help me out, to connect?
from network import LTE import pycom import time lte = LTE() def send_at_cmd_pretty(cmd): response = lte.send_at_cmd(cmd).split('\r\n') for line in response: print(line) print("LTE-M1 procedure") #print("NB-IoT procedure") #send_at_cmd_pretty('ATZ') # Reset to default config #send_at_cmd_pretty('AT&F') # Reset to factory config #time.sleep(5) print("Resetting to factory config...", end='') send_at_cmd_pretty('AT^RESET') # Hard reset time.sleep(5) print("FSM status 1 ", end='') send_at_cmd_pretty('AT!="fsm"') # OK time.sleep(5) print('Status 1:') send_at_cmd_pretty('AT!="showphy"') # OK time.sleep(5) print("RF off mode / Low power... ", end='') send_at_cmd_pretty('AT+CFUN=0') # OK time.sleep(5) print("Clear scan configuration...", end='') send_at_cmd_pretty('AT!="clearscanconfig"') # OK time.sleep(5) print("Add band 20 to scan...", end='') send_at_cmd_pretty('AT!="addscanband band=20"') # OK time.sleep(5) print("Disable log 1....", end='') send_at_cmd_pretty('AT!="disablelog 1"') # OK time.sleep(5) print("Config of the LTE APN...", end='') send_at_cmd_pretty('AT+CGDCONT=1,"IP","item.internet.m2m"') # OK #send_at_cmd_pretty('AT+CGDCONT=1,"IP","Item.webtrail.m2m"') #send_at_cmd_pretty('AT+CGDCONT=1,"IP","Internet.m2m"') #send_at_cmd_pretty('AT+CGDCONT=1,"IP","M2MC.WEBTRAIL"') time.sleep(5) #print("Instellen van NB-IoT APN...", end='') #send_at_cmd_pretty('AT+CGDCONT=1,"IP","c.dpiot.t-mobile.nl"') #time.sleep(5) print("Add scanfreq band en dl-earfcn...", end='') send_at_cmd_pretty('AT!="RRC::addscanfreq band=20 dl-earfcn=6300"') # scan band 20/6240 of band 8/3650 of band 28/9410 time.sleep(5) print("Turn module to full functionality...", end='') send_at_cmd_pretty('AT+CFUN=1') # OK print("wait 30 sec") time.sleep(5) print("wait 25 sec") time.sleep(5) print("wait 20 sec") time.sleep(5) print("wait 15 sec") time.sleep(5) print("wait 10 sec") time.sleep(5) print("wait 5 sec") time.sleep(5) print("FSM status 2 ", end='') send_at_cmd_pretty('AT!="fsm"') # OK time.sleep(5) print("Show list with networks...", end='') send_at_cmd_pretty('AT+COPS=?') # +COPS: (2,"NL KPN","NL KPN","20408",7)(1,"vodafone NL","voda NL","20404",7),,(0,1,2,3,4),(0,1,2) print("wait 30 sec") time.sleep(5) print("wait 25 sec") time.sleep(5) print("wait 20 sec") time.sleep(5) print("wait 15 sec") time.sleep(5) print("wait 10 sec") time.sleep(5) print("wait 5 sec") time.sleep(5) print("Current network...", end='') send_at_cmd_pretty('AT+COPS?') # +COPS: 1 time.sleep(5) print("Config to network 2: KPN", end='') # i want +COPS: 2 KPN send_at_cmd_pretty('AT+COPS=2') time.sleep(5) print("Current network...", end='') send_at_cmd_pretty('AT+COPS?') # +COPS: 2 time.sleep(5) print("LTE attach functie... ", end='') lte.attach(band=20) # poging tot verbinden, soms nodig, doet iets intern, beetje vaag print("OK") print("wait 30 sec") time.sleep(5) print("wait 25 sec") time.sleep(5) print("wait 20 sec") time.sleep(5) print("wait 15 sec") time.sleep(5) print("wait 10 sec") time.sleep(5) print("wait 5 sec") time.sleep(5) print("Error report...", end='') send_at_cmd_pretty('AT+CEER') # +CEER: lastEmmCause: NO CAUSE RECEIVED, lastEsmCause: NO CAUSE RECEIVED time.sleep(5) print('Status 2:') send_at_cmd_pretty('AT!="showphy"') # OK time.sleep(5) print("FSM status 3 ", end='') send_at_cmd_pretty('AT!="fsm"') # OK time.sleep(5) print("Force register to network...", end='') # ERROR, also the forced network disappears from list #send_at_cmd_pretty('AT+COPS=1,2,"20408"') # force select and register network, connect with KPN #send_at_cmd_pretty('AT+COPS=1,2,"20416"') # force select and register network, connect with T-Mobile print("wacht 30 sec") time.sleep(5) print("wacht 25 sec") time.sleep(5) print("wacht 20 sec") time.sleep(5) print("wacht 15 sec") time.sleep(5) print("wacht 10 sec") time.sleep(5) print("wacht 5 sec") time.sleep(5) print("FSM status 4 ", end='') send_at_cmd_pretty('AT!="fsm"') # OK time.sleep(5) print("Check signal strength...", end='') send_at_cmd_pretty('AT+CSQ') # +CSQ: 24,99 OK time.sleep(5) print("Connected?...", end='') # +CGATT: 0 send_at_cmd_pretty('AT+CGATT?') time.sleep(5) print("Show IP adres:...", end='') send_at_cmd_pretty('AT+CGPADDR') # +CGPADDR: 1 +CGPADDR: 2 time.sleep(5) print('Status 3:') send_at_cmd_pretty('AT!="showphy"') # OK time.sleep(5) print("FSM status 5 ", end='') send_at_cmd_pretty('AT!="fsm"') # OK time.sleep(5) #lte.deinit() print('Finished') #send_at_cmd_pretty('AT+COPN') # List operators names # LTE/NB: +COPN: "20408","NL KPN" # "20416","T-Mobile" -
@chielvdiepen There is a problem in the lte.attach() API. @xykon adresses this in a trial firmware build at [LINK NO LONGER AVAILABLE]
Please download and install that (install from file). It may fix you problem.
See also this thread around https://forum.pycom.io/topic/3549/important-update-regarding-lte-modem-updates/83 and -
This is my output of SHOWPHY:
DL SYNCHRO STATISTICS ===================== Synchro state : DRX_SLEEP PPU SIB1 ACQ watchdog : 0 Frequency Hypothesis RF (Hz) : 0 RSRP (dBm) : -76.29 RSRQ (dB) : -7.05 Channel estimation state (Cell-spec.) : HIGH CINR Channel estimation state (UE-spec.) : LOW CINR Channel estimation state (MBSFN) : LOW CINR Channel estimation CINR : 28.63 Channel length : SHORT AGC AGC RX gain (dB) : 38.58 RX PSD BO (dBFs) : -22.12 RX PSD (dBm) : -80.21 Noise level RS (dBm) : -100.75 Digital gain (dB) : 5.04 CINR RS (dB) : 24.46 NARROWBANDS Last DL NB : Central Last UL NB : 0 AFC Frequency offset RF (Hz) : -362 Frequency offset BB (Hz) : 0 PBCH MIB received quantity : 91 MIB timeout quantity : 0 OKAnd FSM:
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 |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 -
@robert-hh unfortunately the new software version is not working, but still thank you for the quick reply.
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@ChielvDiepen We just managed to connect to the KPN LTE-M1 network. Try replacing the following AT-commands:
OLD:send_at_cmd_pretty('AT!="addscanband band=20"')NEW:
send_at_cmd_pretty('AT!="RRC::addScanBand band=20"')OLD:
send_at_cmd_pretty('AT+CGDCONT=1,"IP","item.internet.m2m"')NEW (notice the typo: ITEM should be LTEM) :
send_at_cmd_pretty('AT+CGDCONT=1,"IP","ltem.internet.m2m"')OR (this is the APN we use):
send_at_cmd_pretty('AT+CGDCONT=1,"IP","ltem.webtrial.m2m"')REMOVE (we didn't need it):
send_at_cmd_pretty('AT!="RRC::addscanfreq band=20 dl-earfcn=6300"')OLD:
send_at_cmd_pretty('AT+COPS=2')NEW:
send_at_cmd_pretty('AT+COPS=1,2,"20408"')The xykon firmware is not necessary, this works for us with 1.18.1.r1
Last but crucial in our case was to upgrade the modem firmware to CAT-M1. Upgrading to NB-IoT overwrites the CAT-M1 firmware and then lte.attach() will not work with the commands above.
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@optionseven When i tried your suggestion code with my code, it gave me an error at ('AT+COPS=1,2,"20408"'). Dont understand why it is working for you. Could you maybe show me your code?
Show list with networks... +COPS: (2,"NL KPN","NL KPN","20408",7)(1,"vodafone NL","voda NL","20404",7),,(0,1,2,3,4),(0,1,2) OK wait 10 sec wait 5 sec Current network... +COPS: 1 OK Config to network 2: KPN ERROR -
@chielvdiepen are you certain the modem firmware running is CATM1-38638.dup?
Here is my code:
import socket import ssl import time from network import LTE def pretty(cmd): response = lte.send_at_cmd(cmd).split('\r\n') for line in response: print(line) lte = LTE() # instantiate the LTE object print("Resetting modem:") pretty('AT^RESET') pretty('AT!="fsm"') time.sleep(5) # DL SYNCHRO STATISTICS pretty('AT!="showphy"') time.sleep(5) print("Turning off antenna:") pretty('AT+CFUN=0') time.sleep(5) print("Clearing scanning configuration:") pretty('AT!="clearscanconfig"') time.sleep(5) print("Adding scan frequency for band 20") pretty('AT!="RRC::addScanBand band=20"') pretty('AT!="disablelog 1"') time.sleep(5) print("Configure PDP Context 1:") pretty('AT+CGDCONT=1,"IP","ltem.webtrial.m2m"') time.sleep(5) print("Turning on modem") pretty('AT+CFUN=1') time.sleep(15) print("Registering manually to KPN network:") pretty('AT+COPS=1,2,"20408"') time.sleep(5) print("Checking which network the modem is registered to") pretty('AT+COPS?') time.sleep(5) # If correctly configured for carrier network, attach() should succeed. if not lte.isattached(): print("Attaching to LTE network ", end='') lte.attach() while(True): if lte.isattached(): print(" OK") break print('.', end='') time.sleep(1) # Once attached, connect() should succeed. if not lte.isconnected(): print("Connecting on LTE network ", end='') lte.connect() while(True): if lte.isconnected(): print(" OK") break print('.', end='') time.sleep(1) s = socket.socket() s = ssl.wrap_socket(s) s.connect(socket.getaddrinfo('www.google.com', 443)[0][-1]) s.send(b"GET / HTTP/1.0\r\n\r\n") print(s.recv(4096)) s.close() -
@optionseven I tried your code, result below. And yes, i updated tot 1.18.1.R1 (latest) and installed the catm1.dup again. So i started with a fresh install.
Configure PDP Context 1: OK Turning on modem OK +COPS: (2,"NL KPN","NL KPN","20408",7)(1,"vodafone NL","voda NL","20404",7),,(0,1,2,3,4),(0,1,2) OK Registering manually to KPN network: ERROR +CEREG: 2 Checking which network the modem is registered to +COPS: 1 OK Attaching to LTE network ..............Version of modem:
SYSTEM VERSION
FIRMWARE VERSION
Bootloader0 : 5.1.1.0 [33080]
Bootloader1* : 5.1.1.0 [38638]
Bootloader2 : 5.1.1.0 [38638]
NV Info : 1.1,0,0
Software : 5.1.1.0 [38638] by robot-soft at 2018-08-20 09:51:46
UE : 5.0.0.0d
COMPONENTS
ZSP0 : 1.0.99-13604
ZSP1 : 1.0.99-12341 -
Hi,
After upgrading im no longer able to attach. Im not able to find a solution and also not able to find how to return to stock modem firmware.
###CODE
from network import LTE
lte = LTE(carrier="at&t")
lte.attach(band=4)
def pretty(cmd):
response = lte.send_at_cmd(cmd).split('\r\n')
for line in response:
print(line)#Troubleshooting
###get the System FSM
AT!="fsm"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 |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 |ABSENT | | HP SMS MO FSM |IDLE | | HP SMS MT FSM |IDLE | | HP CAT FSM |NULL | +--------------------------+--------------------+###Fet the PHY status
AT!="showphy"DL SYNCHRO STATISTICS
Synchro state : DRX_SLEEP PPU SIB1 ACQ watchdog : 0 Frequency Hypothesis RF (Hz) : 0 RSRP (dBm) : -98.70 RSRQ (dB) : -13.89 Channel estimation state (Cell-spec.) : LOW CINR Channel estimation state (UE-spec.) : LOW CINR Channel estimation state (MBSFN) : LOW CINR Channel estimation CINR : 1.77 Channel length : SHORTAGC
AGC RX gain (dB) : 55.16
RX PSD BO (dBFs) : -20.15
RX PSD (dBm) : -101.62
Noise level RS (dBm) : -101.98
Digital gain (dB) : 9.87
CINR RS (dB) : 3.28
NARROWBANDS
Last DL NB : Central
Last UL NB : 0
AFC
Frequency offset RF (Hz) : -1323
Frequency offset BB (Hz) : 0
PBCH
MIB received quantity : 14
MIB timeout quantity : 0International Mobile Subscriber Identity
AT+CIMI=?
Error###Signal quality
AT+CSQ
+CSQ: 15,99PDP Context
AT+CGDCONT?
+CGDCONT: 1,"IP","web.iusacellgsm.mx",,,,0,0,0,0,0,0###Network Registration
AT+CREG?
+CREG: 0,0###Software Version
ATI1
UE5.0.0.0d
LR5.1.1.0-38638###ATC Cell Monitoring
#Supported values
AT+SQNMONI=?
#Report from all cells
AT+SQNMONI=7
+SQNMONI: TELCEL Cc:334 Nc:020 RSRP:-1 RSRQ:-1 TAC:23330 Id:235 EARFCN:2050 PWR:-1 PAGING:128
+SQNMONI: TELCEL Cc:334 Nc:020 RSRP:-1 CINR:-1 RSRQ:-1 TAC:23330 Id:235 EARFCN:2050 PWR:-1 PAGING:128###ICCID (card identification number) on the SIM card.
AT+SQNCCID
SQNCCID: "",""###Conformance Test Mode
AT+SQNCTM?
+SQNCTM: standard -
I'am giving up.Tried everything to get my FiPy to work on the KPN network, but after several late evenings.....
After upgrading the modem tot 39529 he won't run anything anymore.
Sounds familiar ?
Elfred -
@elfred don't give up. I just got my FiPy working after a month of waiting. Come to find out it was a simple stupid mistake because of incorrect information in the docks. I was using lte.connect(cid=3), as per documentation when on Verizon's, network. This did not work for me. Until I changed to cid=1 and now it works without a hitch. Not sure why that is. I am currently using Verizon M2M Demo sim cards and have been working for the last several days. With some hiccups every now and then, due to power interruptions and server DNS errors.
Here is the code I use to connect to verizon now.
import socket import ssl import time from network import LTE import pycom pycom.heartbeat(False) debug = True def at(cmd): ("modem command: {}".format(cmd)) response = lte.send_at_cmd(cmd).split('\r\n') for line in response: print(line) if (debug) : print('creating LTE object - carrier verizon') # lte = LTE() lte = LTE(carrier="verizon") pycom.rgbled(0x7f0000) #red to show LTE established # lte = LTE(carrier="at&t") # instantiate the LTE object if (debug) : print('resetting modem, may take up to 5 secs...') if (debug) : print('attaching...') lte.attach() # attach the cellular modem to a base station # lte.attach(band=13) # attach the cellular modem to a base station while not lte.isattached(): if (debug) : print('waiting for isattached...') time.sleep_ms(1000) pycom.rgbled(0x7f7f00) #yellow to show LTE attached if (debug) : print('connecting...') # lte.connect() # start a data session and obtain an IP address lte.connect(cid=1) # cid=3 for verizon - start a data session and obtain an IP address while not lte.isconnected(): if (debug) : print('waiting for isconnected...') time.sleep_ms(500) pycom.rgbled(0x00007f) #blue to show LTE attached if (debug) : print('create socket') s = socket.socket() if (debug) : print("Connect to: www.ces-web.com") sockaddr = socket.getaddrinfo('www.google.com', 80)[0][-1] #print("Connect to: www.google.com") #s = ssl.wrap_socket(s) #sockaddr = socket.getaddrinfo('www.google.com', 443)[0][-1] if (debug) : print("socket address: {}".format(sockaddr)) s.connect(socket.getaddrinfo('www.google.com', 80)[0][-1]) pycom.rgbled(0x007f00) #green to show LTE attached if (debug) : print("send GET request") s.send(b"GET / HTTP/1.0\r\n\r\n") if (debug) : print("receive response") if (debug) : print(s.recv(16)) s.close() if (debug) : print("socket closed") pycom.heartbeat(True) -
@wghirakawa Thanks for the encouragement. After a night sleep I picked it up again. Did a hard reset of the modem, uploaded the latest firmware again (CATM1-39529.dup) and got the equipment running again. But no, no attachment whatsoever. I think I have to dive into the firmware software.
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@elfred I had a gpy lte modem die on me. After trying everything I could think of I purchased another gpy and all good again. So weird because wifi, power consumption & all the other functionality still OK. For what it's worth a dead modem fingerprint looks like
SYSTEM FSM ========== +--------------------------+--------------------+ | FSM | STATE | +--------------------------+--------------------+ | RRC TOP FSM |STOPPED | | RRC SEARCH FSM |NULL | | RRC ACTIVE FSM |NULL | | PMM PLMN FSM |NULL | | 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 | +--------------------------+--------------------+ OKand
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 : 0Have you checked your sim in another device to verify it's OK?
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@kjm Sad to see you lost a board. Thanks for the fingerprint. That's actually quite usefull.
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@kjm Thanks for the reply. Funny thing is that sometimes I get the fingerprint you've shown in you're post and the other time I get good result in terms of RSRP, RSRQ etc.
I'll check the SIM in an other device. Good thinking.
In the Jasper Wireless portal of KPN I can do a diagnostics test. That one failed. I've asked the question to KPN, but no answer yet.Thanks again and lets make IoT really work
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What I see in the FSM of @kjm is HP USIM FSM : Ready.
I See HP USIM FSM: Absent.No wonder it's not working.
Can't figure out what's wrong.
Going back to KPN -
Entlich mal. I've got connection. Got finally a new SIM from KPN and it worked immediately . Thanks all for the encouraging words:-)
Now I can start my project.
Keep you posted.
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