How to get FiPy working on KPN LTE-M network?

[avbalen]

Could someone please post a working example of how to get a FiPy operational on the KPN LTE-M network in the Netherlands? There are some scattered messages in these forums and in the KPN forums, some people seem to have it working but a complete, always working, example is nowhere to be found. Too bad as FiPy is around for quite some time now (as is the KPN LTE-M network). Information over what should be an entirely trivial operation appears to be non-existent.
For that matter, please use the latest firmware and modem firmware (41065 at time of writing).

Thanks in advance!

[han]

@avbalen
It works when you update your sqn3330 to version CATM1 41056.

[han]

Hi avbalen,

I am also struggling with connecting my FiPy to the kpn network but I make some progress.
The firmware i use is 1.20.rc13 with the pycom firmware updater version 1.16.1.
The version of the Pymakr plugin is 1.5.6.

import socket
import pycom
import ssl
import time
from network import LTE

# Colors
off = 0x000000
red = 0xff0000
green = 0x00ff00
blue = 0x0000ff
yellow = 0xffff00

# Turn off hearbeat LED
pycom.heartbeat(False)

lte = LTE()

#set the apn
lte.send_at_cmd('AT+CGDCONT=1,"IP","ltem.webtrial.m2m"')

lte.send_at_cmd('AT+CFUN=0') # disable modem
lte.send_at_cmd('AT!="clearscanconfig"') # clear scanned frequencies
lte.send_at_cmd('AT!="addscanfreq band=20 dl-earfcn=6400"') # set scanned frequency
lte.send_at_cmd('AT+CFUN=1') # enable modem

lte.attach()
# wait for the attach flag to set and use the connect call
# the modem will auto connect from the previous call regardless but still need to call this otherwise the unit does not know it's connected
while not lte.isattached():
    pycom.rgbled(red)
    time.sleep(0.25)
    pycom.rgbled(off)
    print("not attached")

lte.connect()
while not lte.isconnected():
    pycom.rgbled(yellow)
    time.sleep(0.25)
    pycom.rgbled(off)
    print("not connected")

pycom.rgbled(blue)
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()
pycom.rgbled(green)

With the above printed code the FiPy attached to the KPN Nenetwork. I can see that in the Jasper Wireless portal.
The green dot shows that the sim is in use.

But by the part that the FiPy should connect to the network I got stuck
The rgb led flash one time red and the serial terminal keeps printing "not connected".

Maybe you know a trick to get further with the code so it will work well.