Hi all,

We are trying to establish communication between S7-1200 and Microsoft Azure Cloud through the Use of MQTT Protocol.

The purpose of this is, we want to “Publish” and “Subscribe” messages to and from Cloud server.

Here Type of MQTT Broker we are using is“Mosquitto MQTT Broker”.

• For Publish(Publish Data from S71200 to Cloud):
  we have used Siemens Library block-“LMqtt_Publisher-FB2” .we are able to publish data on cloud.

Library information taken from following link

https://support.industry.siemens.com/cs/document/109748872/mqtt-publisher-for-simatic-cpu?dti=0&lc=en-WW

• For Subscriber (Subscribe Data from Cloud to S7-1200) :
  We are facing issues for subscription.

We want to know is there any Siemens System library for Subscription to MQTT?

You could try a bit the attached example, tested with mosquitto.

Best regards,

Yu-wen

Yu-wen Tang

You could try a bit the attached example, tested with mosquitto.

Best regards,

Yu-wen

Vocês já conseguiram usar o bloco para fazer várias publicações e assinaturas? 

[This is an English forum. Translation: Have you managed to use the block to make several publications and subscriptions?]

Fernando Fernandes

Yu-wen Tang

You could try a bit the attached example, tested with mosquitto.

Best regards,

Yu-wen

Hello Yu-wen,

I'm using this version and it's working very well. And thanks for give us such MQTT client.

There are any chance some one already changed the connection to use Domain name instead IPv4?

I did a littlle serch and find that CPU interface support communication with QDN (Qualified domain name).

Thanks,

Fernando Fernandes