SAP Event Mesh send MQTT

[DLange]

Hi community,

does someone have an idea / blog post / instruction how to send MQTT events / messages from external system to SAP Event Mesh? I have complete Event Mesh setup but no glue where to get the necessary infos like port... I am trying to connect via MQTTX tool. Maybe someone did already similar.

Thanks

Best regards

DL

[Tobias_Griebe · Accepted solution]

Hi dlange_87,

you get all the credentials and endpoints when you create a service key for your Event Mesh instance. See also here: Understanding Service Key of SAP Event Mesh

I haven't used MQTTX myself, but you need to make sure that it supports MQTT over WebSockets, or it won't be able to connect to SAP Event Mesh.

Best regards,
Tobias

[DLange · Accepted solution]

Hi tobias.griebe,

thanks for the hint. The credentials in the service key are clear for me. REST interface is also working. Do you / does SAP have a recommendation / best practice regarding tooling to test MQTT over Websocket together with SAP Event Mesh?

Thanks

Best regards

DL

[Tobias_Griebe · Accepted solution]

Hi dlange_87,

I personally haven't used any third party tool for my tests. For a quick demo or test I usually use the node.js Lib, that you can also run from your local machine with the contained producer and consumer example: https://www.npmjs.com/package/@sap/xb-msg-mqtt-v311

Obviously this is not as fancy as a native app with an UI. 😉

Best regards,
Tobias

[DLange · Accepted solution]

Hi tobias.griebe,

thanks for the hint regarding the node.js Lib. I am wondering if we could not send MQTT events / messages from an external MQTT broker to the SAP Event Mesh. At least currently I have no idea how to configure the MQTT broker to send data (topics like OAuth 2.0, Port, ...)

Thanks

Best regards

DL

[Tobias_Griebe · Accepted solution]

Hi dlange_87,

do you have a specific MQTT broker in mind for this?
As you already mentioned brokers are usually only providing server capabilities. This is the same for SAP Event Mesh. In such a scenario you would need some kind client/integration layer (like SAP Integration Suite - CPI) that establishes the connectivity to both brokers.

SAP Event Mesh offers the webhook functionality to push incoming messages from a queue to a REST endpoint. Depending on the detailed use-case this might be an option for such an integration, but this would only be one-way.

Best regards,
Tobias

[DLange · Accepted solution]

Hi tobias.griebe,

we were able to manage our challenges in the meanwhile. Via webhook we push the event from event Mesh via Cloud Connector to onPremise webservice. Thanks for hints / advise.

Best regards

DL