Azure Service Bus: No messages on queue, only requests

Question

I'm trying to route messages from an IoT hub to a function app using a service bus queue as an Iot hub endpoint. The messages I send to the IoT hub are registered in the IoT hub, but won't be routed to the service bus queue. When I monitor the service bus queue, I only see successful requests.

IoT hub example

Service bus example

I implemented two routing rules with the following criteria:

$._eventtype="meeting"

and

$body._eventtype="meeting"

I tested the second one with the example provided by Azure and it matched. Neither of them seem to forward the messages to the service bus.

Find below a sample message, which I'm trying to route.

{"_room": "-----", 
 "_eventtype": "meeting", 
 "_temperature": 25, 
 "_building": "-----", 
 "_timestamp": "2018-01-24T11:08:13.056792Z", 
 "_humidity": 36, 
 "_id": 0}

Roman Kiss Roman Kiss · Accepted Answer · 2018-01-24T19:08:34

Your Routes expression for message body is correct. It looks like, your event message is missing a Content type and Content encoding headers, see more details here.

In the case, when your device is MQTT direct connected, use the following topic, example for Device1:

devices/Device1/messages/events/$.ce=utf-8&$.ct=application%2Fjson

for Http connected device:

content-encoding:utf-8
content-type:application/json

Azure Service Bus: No messages on queue, only requests

3 Answers