nRF9160 how to connect

RE: nRF9160 how to connect

Hakon — Fri, 31 Jan 2020 14:43:26 GMT

[quote user="Ian Mellor"]Changing it in prj.conf doesn't work but changing it in autoconf.h does work.[/quote]

So building doesn't overwrite it?

RE: nRF9160 how to connect

Yano — Thu, 30 Jan 2020 16:40:32 GMT

Sorry one more question:

Once we manually use AT commands to configure modem it starts the connection process:

LTE Link Connected!

IPv4 Address found 137.135.83.217

ERROR: mqtt_connect -60

Note: 137.135.83.217 is not white listed in our SIMs which might explain the error.

How does it resolve this IP address?

137.135.83.217 is mqtt.eclipse.org but this is commented out in the prj.conf file?

Changing it in prj.conf doesn't work but changing it in autoconf.h does work.

RE: nRF9160 how to connect

Yano — Thu, 30 Jan 2020 14:06:33 GMT

Thanks Hakon,

We can't find CONFIG_LTE_NETWORK_MODE_NBIOT=y in the prj.conf so we added it. Is that OK?

Where do we put the other settings e.g. AT+CGDCONT=0,"IP","eplpwa.vodafone.iot" etc. ?

I assume the simple MQTT example just run and connect without AT command intervention once all is set right?

RE: nRF9160 how to connect

Hakon — Thu, 30 Jan 2020 12:22:01 GMT

[quote user="Ian Mellor"]1. Does the LTE Link monitor work with the MQTT sample (is it built into the nRF9160 firmware not the app)? [/quote]

It should work fine for MQTT simple, as the at host is enabled by default.

[quote user="Ian Mellor"]2. Is there a way to ping an IP address to test the route or is there another way?[/quote]

There is no functionality for pinging an IP address in the SDK that I'm aware of. You could implement it yourself though.

[quote user="Ian Mellor"]3. How can we set it to be permanently on NB-IOT so we don't need to use AT%XSYSTEMMODE=0,1,0,0?[/quote]

You can set the option CONFIG_LTE_NETWORK_MODE_NBIOT=y in prj.conf in the project directory.

[quote user="Ian Mellor"]4. Where can we modify the MQTT IP address? [/quote]

You can set the option CONFIG_MQTT_BROKER_HOSTNAME="190.10.3.4" in prj.conf in the project directory.

RE: nRF9160 how to connect

Yano — Wed, 29 Jan 2020 22:48:12 GMT

Hi Hakon,

Thanks we are now connected!

This the AT sequence that seem to work:

AT+CFUN=1

AT+CGDCONT=0,"IP","eplpwa.vodafone.iot"

AT+CGAUTH=0,"PAP","vodafone","vodafone"

AT+CFUN=4

AT%XSYSTEMMODE=0,1,0,0

AT+COPS=1,2,"27201"

AT+CFUN?

Now we are connecting we are going to try the MQTT sample.

A few questions:

1. Does the LTE Link monitor work with the MQTT sample (is it built into the nRF9160 firmware not the app)?

2. Is there a way to ping an IP address to test the route or is there another way?

3. How can we set it to be permanently on NB-IOT so we don't need to use AT%XSYSTEMMODE=0,1,0,0?

4. Where can we modify the MQTT IP address?

Searching the project I find this in three places:

GEN_ABSOLUTE_SYM(CONFIG_MQTT_BROKER_HOSTNAME, 1);

Changing it to this generates an error:

GEN_ABSOLUTE_SYM(CONFIG_MQTT_BROKER_HOSTNAME, "190.10.3.4");

RE: nRF9160 how to connect

Hakon — Wed, 29 Jan 2020 14:22:40 GMT

Hello,

please update the modem firmware, you are using a very old release.