Fipy + Pytrack v1.18.1.r4 + SNQNS Firmware CATM1-39592 - Verizon Socket Connection OSERROR:-1

[wghirakawa]

Been trying this for several days, even reset SQNS Modem back to factory settings using at command to make sure that there are no issues. I am able to get ipaddress using the socket.getaddrinfo() function but, as far as connecting to the socket using the return addrinfo, i get an OSERROR:-1. Below is the code I am attempting to execute.

import socket
import ssl
import time
from network import LTE

print('creating LTE object - carrier verizon')
# lte = LTE()
lte = LTE(carrier="verizon")
# lte = LTE(carrier="at&t")         # instantiate the LTE object
print('resetting modem, may take up to 5 secs...')
lte.reset()
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():
    print('waiting for isattached...')
    time.sleep_ms(1000)

print('connecting...')
# lte.connect()       # start a data session and obtain an IP address
lte.connect(cid=3)    # cid=3 for verizon - start a data session and obtain an IP address
while not lte.isconnected():
    print('waiting for isconnected...')
    time.sleep_ms(500)

print('create socket')
s = socket.socket()

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]

print("socket address: {}".format(sockaddr))

s.connect(sockaddr)
print("send GET request")
s.send(b"GET / HTTP/1.0\r\n\r\n")
print("receive response")
print(s.recv(16))
s.close()
print("socket closed")
lte.disconnect()
print("disconnected")
lte.dettach()
print("dettached")
lte.deinit()
print("deinit")

The response I get when executing s.connect() is as follows.

Traceback (most recent call last):
  File "<stdin>", line 38, in <module>
OSError: -1

Need help please! @Xykon & @rskoniec

[danielm]

Try it with 1.18.1.r6.

[wghirakawa]

Will try with r6. Thanks @danielm

[wghirakawa]

@danielm where can I find r6. I tried doing the development version via the pycom firmware updater and it only download b5.

[danielm]

@wghirakawa
It is a pre-release which is available for download here:
https://github.com/pycom/pycom-micropython-sigfox/releases/tag/v1.18.1.r6

[wghirakawa]

@danielm r6 pre-release Did not work either. Please see code and output below.

import socket
import ssl
import time
from network import LTE

print('creating LTE object - carrier verizon')
# lte = LTE()
lte = LTE(carrier="verizon")
# lte = LTE(carrier="at&t")         # instantiate the LTE object
print('resetting modem, may take up to 5 secs...')
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():
    print('waiting for isattached...')
    time.sleep_ms(1000)

print('connecting...')
# lte.connect()       # start a data session and obtain an IP address
lte.connect(cid=3)    # cid=3 for verizon - start a data session and obtain an IP address
while not lte.isconnected():
    print('waiting for isconnected...')
    time.sleep_ms(500)

print('create socket')
s = socket.socket()

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]

print("socket address: {}".format(sockaddr))

s.connect(sockaddr)
print("send GET request")
s.send(b"GET / HTTP/1.0\r\n\r\n")
print("receive response")
print(s.recv(16))
s.close()
print("socket closed")
lte.disconnect()
print("disconnected")
lte.dettach()
print("dettached")
lte.deinit()
print("deinit")

>>> import os
>>> os.uname
<function>
>>> os.uname()
(sysname='FiPy', nodename='FiPy', release='1.18.1.r6', version='v1.8.6-849-a8966d1 on 2018-11-23', machine='FiPy with ESP32', lorawan='1.0.2', sigfox='1.0.1')
>>> Running test.py

>>>
>>>
creating LTE object - carrier verizon
resetting modem, may take up to 5 secs...
attaching...
waiting for isattached...
waiting for isattached...
waiting for isattached...
waiting for isattached...
waiting for isattached...
waiting for isattached...
waiting for isattached...
waiting for isattached...
waiting for isattached...
waiting for isattached...
connecting...
create socket
Connect to: www.ces-web.com
socket address: ('172.217.164.100', 80)
Traceback (most recent call last):
  File "<stdin>", line 39, in <module>
OSError: -1
>
Pycom MicroPython 1.18.1.r6 [v1.8.6-849-a8966d1] on 2018-11-23; FiPy with ESP32
Type "help()" for more information.
>>>
>>> import sqnsupgrade
>>> sqnsupgrade.
reconnect_uart  crc             LTE             __name__
VERSION         UART            uart            detect_error
info            sqnsupgrade     struct          time
SD              sys             os              sysname
run             print_welcome   release         stp
>>> sqnsupgrade.VERSION
'1.2.0'
>>> sqnsupgrade.info()
<<< Welcome to the SQN3330 firmware updater [1.2.0] >>>
>>> FiPy with firmware version 1.18.1.r6
Your modem is in application mode. Here is the current version:
UE5.0.0.0d
LR5.1.1.0-39529```

[danielm]

@wghirakawa
The code seems to be ok. I don't have access to Cat M1 network (only NB-IoT available here) so I cannot test with the same Sequans firmware.

Are you able to perform communication on the same APN and with the same SIM using different hardware?

@iwahdan could you please take a look?