Can't establish PPP connection

edsonrm117 · January 14, 2021, 5:09pm

Hi,

I’m trying to configure a 4G HAT in Mexico. I already configured these type of HATs using AT&T, with QUECTEL EC25-A FA modules

However, now I’m trying to configure a module using a Telit LE910C1-NF single SKU. I still using AT&T as provider. However in this case, chat connect script fails. How can I establish a PPP connection?

PON output:
sudo pon
pppd options in effect:
debug # (from /etc/ppp/peers/provider)
updetach # (from /etc/ppp/peers/provider)
dump # (from /etc/ppp/peers/provider)
noauth # (from /etc/ppp/peers/provider)
remotename 3gppp # (from /etc/ppp/peers/provider)
/dev/ttyUSB3 # (from /etc/ppp/peers/provider)
115200 # (from /etc/ppp/peers/provider)
lock # (from /etc/ppp/peers/provider)
connect chat -s -v -f /etc/chatscripts/chat-connect -T ott.iot.attmex.mx # (from /etc/ppp/peers/provider)
disconnect chat -s -v -f /etc/chatscripts/chat-disconnect # (from /etc/ppp/peers/provider)
nocrtscts # (from /etc/ppp/peers/provider)
modem # (from /etc/ppp/peers/provider)
asyncmap 0 # (from /etc/ppp/options)
lcp-echo-failure 4 # (from /etc/ppp/options)
lcp-echo-interval 30 # (from /etc/ppp/options)
hide-password # (from /etc/ppp/peers/provider)
novj # (from /etc/ppp/peers/provider)
novjccomp # (from /etc/ppp/peers/provider)
ipcp-accept-local # (from /etc/ppp/peers/provider)
ipcp-accept-remote # (from /etc/ppp/peers/provider)
ipparam 3gppp # (from /etc/ppp/peers/provider)
noipdefault # (from /etc/ppp/peers/provider)
ipcp-max-failure 30 # (from /etc/ppp/peers/provider)
defaultroute # (from /etc/ppp/peers/provider)
usepeerdns # (from /etc/ppp/peers/provider)
noccp # (from /etc/ppp/peers/provider)
noipx # (from /etc/ppp/options)
abort on (BUSY)
abort on (NO CARRIER)
abort on (NO DIALTONE)
abort on (ERROR)
abort on (NO ANSWER)
timeout set to 30 seconds
send (AT^M)
expect (OK)
^M
OK
– got it

send (ATE0^M)
expect (OK)
^M
^M
OK
 -- got it

 

send (ATI;+CSUB;+CSQ;+COPS?;+CGREG?;&D2^M)
expect (OK)
^M
^M
332^M
^M
ERROR
 -- failed
Failed (ERROR)
Script chat -s -v -f /etc/chatscripts/chat-connect -T ott.iot.attmex.mx finished (pid 2343), status = 0x7
Connect script failed

ensar · January 15, 2021, 12:30pm

Hi @edsonrm117,

About your issue, it is better to share more information with us. Have you tried to follow the troubleshooting steps?

Could you please provide the output of the following command:

uname -sr
lsusb
lsusb -t
ls /dev/ttyUSB*
dmesg | grep ttyUSB
sudo cat /sys/kernel/debug/usb/devices

edsonrm117 · January 18, 2021, 3:41pm

Yes, I tried to use those steps.

Is there any problem with using a Telit PCIe Module in Mexico?

Here is the output from those commands:
pi@raspberrypi:~ $ uname -sr
Linux 5.4.51-v7l+
pi@raspberrypi:~ $ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 1bc7:1201 Telit Wireless Solutions
Bus 001 Device 005: ID 03f0:0024 HP, Inc KU-0316 Keyboard
Bus 001 Device 004: ID 0715:0206
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
pi@raspberrypi:~ $ lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 1: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 2: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 3: Dev 3, If 0, Class=Vendor Specific Class, Driver=option, 480M
|__ Port 3: Dev 3, If 1, Class=Vendor Specific Class, Driver=, 480M
|__ Port 3: Dev 3, If 2, Class=Vendor Specific Class, Driver=qmi_wwan, 480M
|__ Port 3: Dev 3, If 3, Class=Vendor Specific Class, Driver=option, 480M
|__ Port 3: Dev 3, If 4, Class=Vendor Specific Class, Driver=option, 480M
|__ Port 3: Dev 3, If 5, Class=Vendor Specific Class, Driver=option, 480M
|__ Port 3: Dev 3, If 6, Class=Vendor Specific Class, Driver=option, 480M
pi@raspberrypi:~ $ ls /dev/ttyUSB*
/dev/ttyUSB0 /dev/ttyUSB1 /dev/ttyUSB2 /dev/ttyUSB3 /dev/ttyUSB4

pi@raspberrypi:~ $ dmesg | grep ttyUSB
[ 7.799006] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB0
[ 7.803023] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB1
[ 7.808342] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB2
[ 7.811724] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB3
[ 7.849526] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB4
pi@raspberrypi:~ $ sudo cat /sys/kernel/debug/usb/devices

T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 1
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0002 Rev= 5.04
S: Manufacturer=Linux 5.4.51-v7l+ xhci-hcd
S: Product=xHCI Host Controller
S: SerialNumber=0000:01:00.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms

T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 4
D: Ver= 2.10 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=2109 ProdID=3431 Rev= 4.21
S: Product=USB2.0 Hub
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=256ms

T: Bus=01 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 4 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0715 ProdID=0206 Rev= 0.01
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=202mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=usbhid
E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=2ms

T: Bus=01 Lev=02 Prnt=02 Port=01 Cnt=02 Dev#= 5 Spd=1.5 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=03f0 ProdID=0024 Rev= 1.30
S: Manufacturer=CHICONY
S: Product=HP Basic USB Keyboard
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=01 Driver=usbhid
E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=10ms

T: Bus=01 Lev=02 Prnt=02 Port=02 Cnt=03 Dev#= 3 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1bc7 ProdID=1201 Rev= 3.18
S: Manufacturer=Android
S: Product=LE910C1-NF
S: SerialNumber=0123456789ABCDEF
C:* #Ifs= 7 Cfg#= 1 Atr=a0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=42 Prot=01 Driver=(none)
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
E: Ad=84(I) Atr=03(Int.) MxPS= 8 Ivl=32ms
E: Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=86(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
E: Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=88(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
E: Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 5 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=8a(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
E: Ad=89(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=06(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 6 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=8c(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
E: Ad=8b(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=07(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms

T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=5000 MxCh= 4
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 3.00 Cls=09(hub ) Sub=00 Prot=03 MxPS= 9 #Cfgs= 1
P: Vendor=1d6b ProdID=0003 Rev= 5.04
S: Manufacturer=Linux 5.4.51-v7l+ xhci-hcd
S: Product=xHCI Host Controller
S: SerialNumber=0000:01:00.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms

ensar · January 18, 2021, 8:49pm

Finally, could you please provide me the output of the following AT commands?

AT
ATI
AT+CPIN?
AT+CPAS
AT+CFUN?
AT+COPS?
AT#USBCFG?
AT#BND?
AT+CGDCONT?
AT+CREG?
AT+CSQ
AT+CGATT?
AT+GMM
AT#SWPKGV

edsonrm117 · January 19, 2021, 5:32pm

This is the output from the AT commands:

AT
OK

ATI
332

AT+CPIN?
+CPIN: READY

AT+CPAS
+CPAS: 0

AT+CFUN?
+CFUN: 1

AT+COPS?
+COPS: 0,0,“AT&T”,2

AT#USBCFG?
#USBCFG: 0

AT#BND?
#BND: ,10,80800000000381A

AT+CGDCONT?
+CGDCONT: 1,“IPV4V6”,“nxtgenphone”,"",0,0,0,0
+CGDCONT: 2,“IPV4V6”,“ims”,"",0,0,0,0
+CGDCONT: 3,“IPV4V6”,“sos”,"",0,0,0,1

AT+CREG?
+CREG: 0,1

AT+CSQ
+CSQ: 21,2

AT+CGATT?
+CGATT: 1

AT+GMM
LE910C1-NF

AT#SWPKGV
25.20.266-P0F.260671
M0F.260006
P0F.260671

edsonrm117 · January 21, 2021, 3:24pm

How can we establish the ppp connection?

ensar · January 21, 2021, 4:22pm

Please delete “+CSUB;” from the /etc/chatscripts/chat-connect then try again.