duduita commented on issue #8147:
URL: https://github.com/apache/nuttx/issues/8147#issuecomment-1468717869
Just to let you know, that I could get connected using an LTE-M module
(Quectel BG770A-GL) with NuttX, by using the PPP protocol.
Basically, I had to use the PPPD app on NuttX, and change a few things on
the `connect_script` on the `pppd_main.c`
```
static FAR const char connect_script[] =
"ECHO ON "
"TIMEOUT 30 "
"\"\" AT+CGDCONT=1,\\\"IP\\\",\\\"virtueyes.com.br\\\" "
"OK AT+COPS=1,2,\\\"72410\\\",7 "
"OK ATD*99# "
"CONNECT \\r\\c";
static FAR const char disconnect_script[] =
"\"\" ATZ "
"ERROR \\r\\c";
```
I only had to define my PDP context, use AT+COPS to get registered and
connected, and use ATD*99# to start the dial-up on the modem.
To define the PDP context (replace the variables according to your internet
provider):
`AT+CGDCONT=1,“IP”,“virtueyes.com.br”`
And use the `CONFIG_NETUTILS_PPPD_PAP`, setting the pap authentication in
the `pppd_main.c`:
```
#ifdef CONFIG_NETUTILS_PPPD_PAP
.pap_username = "virtu",
.pap_password = "virtu",
#endif
```
To get registered manually:
`AT+COPS=1,2,“72410”,7
`
A hint to see your internet provider ID is using the AT+COPS=?, since it
will show all the networks your module sees.
If you are not seeing anything, you can set the band used in your country,
for instance, in Brazil we use Band 3 (0x4) for CATM1 and Band 28 (0x8000000)
for NB-IOT, so you need to find the correspondent hex numbers in the datasheet
to use in the following command:
`AT+QCFG=“band”,0x0,0x4,0x8000000
`
Finally, the dial-up command:
`ATD*99#
`
Another important thing: some modems as BG770A-GL requires the `\\r` at the
end of the `connect_script` (Carriage Return).
I was wondering if it would be possible to use LTE-M modems with PPP on
NuttX, but I haven't found any tutorials involving that, it's why I decided to
explain in detail what I've done to do that.
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