Azure IoT Hub Device Twin Change Notification Issues

Question

I'm trying to receive notifications in the cloud back-end when Device twin properties change. To do this I have set up a route as seen in the picture link below

https://imgur.com/a/uh0mV

I have also created an Azure Function that triggers on the default consumer group for the built in end-point events. But when I update the device twin document for one of my device the azure functions does not trigger. And if I monitor the events for the device using iothubexplorer or Device explorer I see no "updateTwin" events at all. However it works if I send regular device-to-cloud from the device I receive those.

Im using the following code to update the device twin:

'use strict';

var Client = require('azure-iot-device').Client;
var Protocol = require('azure-iot-device-mqtt').Mqtt;

var connectionString = '';
var client = Client.fromConnectionString(connectionString, Protocol);


client.open(function(err) {
if (err) {
    console.error('could not open IotHub client');
}  else {
    console.log('client opened');

    client.getTwin(function(err, twin) {
    if (err) {
        console.error('could not get twin');
    } else {
        var body = {
            temperature: '40'
        }

        console.log(twin.properties.reported);

        twin.properties.reported.update(body, function(err) {
            if (err) {
                console.error('could not update twin');
            } else {
                console.log('twin state reported');
                process.exit();
            }
        });
    }
    });
}
});

Ive also tried using iothub-explorer using the following command: iothub-explorer update-twin InitialDevice {\"properties\":{\"desired\": {\"interval\":9000}}} --login ""

for test purpose, you can use a Device Explorer (or Azure portal) for update a device twin desired properties to see a notification message in your Azure Function — Roman Kiss

Michael Xu - MSFT Michael Xu - MSFT · Accepted Answer · 2018-03-20T03:18:48

I tested with the code in your post, it works, so your Routes setup and code are correct.

Have you referred to this topic? I guess the problem is similar with that.Please try to check the account location and test with Roman Kiss's suggestion.

Azure IoT Hub Device Twin Change Notification Issues

1 Answers