Hi, I'm trying to achieve a secure connection to a HiveMQ mqtt broker using LTE-M. As hardware I'm using a Portenta H7 with a CAT M1 NB-IoT GNSS Shield attached. I'm wondering if anybody has achieved a successful connection using this setup. The Arduino native GSM library for the shield apparentl…

Hi mfuhry, I have indeed not been able to achieve this using the GSM library, or any other third party libraries that aim at cellular devices. When I reached out to the Arduino support they stated that they currently do not support SSL in combination with their GSM llibrary out of the box, and SSLC…

Hi, Did you managed to do this ? I'm also trying to connect the portenta h7 to a mqtt broker through LTE-M and if possible with TLS. I also have problems to communicate with the broker though the standard port (without ssl). I can connect to the broker only with the Arduino Mqtt library but once …

@magnotherm @mfuhry @magmilo I am also wanting to do the same thing MQTT -> AWS IOT and the reason I order the GNSS card was to get a production grade MQTT connection, I am currently using the MKR card but want to move to the Portenta H7 and GNSS Any luck with libraries that would allow a secure c…

Hi @jrobertshawe , the setup described in my previous post should work for your purposes. Directly communicating between H7 and the TX62-W module through the UART interface will allow you to set up a secure connection with AWS IoT Core. I was not able to replicate this using any libraries. However…

Thanks @magmilo Do you end up selecting a different GSM card? thanks Julian

@magmilo Waiting for the card to arrive. I will let you know if successful. thanks Julian

Hi @magmilo , I am currently trying to connect the Portenta H7 with the shield via NB-IOT to Azure Iot. I am using the Azure SDK C for this. With the secure connection to mqtt the problems come as already described here. Partially, however, a connection is established and data is sent via mqtt. I u…

Hi @manfi , it'd be helpful to be able to see the specific error you're getting. I'd also recommend writing a post in the Telit Cinterion forum , they were very helpful when trying to figure out how to establish a connection to HiveMQ. That being said, I think you should double check that the corre…

Hi @magmilo , thanks for the fast response! I have checked the certificates, the correct certificate is one among 24, does it cause problems if there are too many certificates? ^SBNR: 4, size: "914", issuer: "/C=US/O=DigiCertInc/OU=www.digicert.com/CN=DigiCertGlobal Root G2", ... Azure uses the …

Hi @manfi , The certificate seems to be nothing to worry about in this case. Judging from your excerpt, I'm assuming that your connection settings are not configured properly. Where did you take the information from? Currently you're trying to connect to a mqtt broker via plain tcp. Try setting t…

MQTT/S via LTE-M (SSL, MQTT, GSM)

Official Hardware Portenta Family Portenta CAT.M1/NB IoT GNSS Shield

magmilo August 28, 2023, 7:51am 7

Hi @jrobertshawe,

we ended up using external hardware in the form of a cellular router as a temporary solution.

Have you tried the approach I mentioned above?

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MQTT/S via LTE-M (SSL, MQTT, GSM)

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