Is Gpy AT&T PTCRB certified?

[pmjackson]

Hello Pycom,

I see that Gpy is Verizon certified.
With the new firmwares, Gpy is working much much better.

I saw in an earlier post that you may be working towards PTCRB for AT&T.
Any update on that?

Thanks

[curtis.hendrix]

I know this is old and I don't have an actual answer to the question. However, I have had good luck connecting to AT&T's network with the GPy using a SIM from AT&T and from Hologram. Will the GPy work AT&T? Probably? Is it AT&T certified? Who knows.

[pechan]

@curtis-hendrix Could you share the code you used to connect to att with a hologram sim card?

[curtis.hendrix]

@pechan I used the CAT-M1 example code verbatim and it worked the first time through.

https://docs.pycom.io/tutorials/lte/cat-m1.html

import socket
import ssl
import time
from network import LTE

lte = LTE()         # instantiate the LTE object
lte.attach()        # attach the cellular modem to a base station
while not lte.isattached():
    time.sleep(0.25)
lte.connect()       # start a data session and obtain an IP address
while not lte.isconnected():
    time.sleep(0.25)

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()

lte.disconnect()
lte.dettach()

Make sure you have updated the modem to latest: https://docs.pycom.io/tutorials/lte/firmware.html

I had to use a micro SD card to update the modem. I couldn't figure out how to upload the files into the internal flash, but that was probably something I was doing wrong.