Azure IoT Hub - MQTT

[FatMax]

I'm trying to push data up to Azure IoT Hub and having some difficulties with the examples I've found on the forum and openrb.com so far.


Does anyone have an example for connecting to Azure IoT Hub with MQTT?

[FatMax]

So no-one has successfully managed a connection towards Azure IoT Hub with LM/SL via MQTT?

I've tried this:

http://openrb.com/mqtt-client/#codesyntax_1

But it doesn't give me any feedback what's wrong, nothing in error log. I'm also doubting it's running at all, as log in between code that should be executed doesn't give results. In Microsofts cloud there are no indications of a connection.

[admin]

Can you send client id, MQTT username and password via PM? Info on username/password format: https://docs.microsoft.com/en-us/azure/i...tt-support

[FatMax]

PM sent

[admin]

Thanks!

First, you need to update MQTT library packages:

New CPU:
https://dl.openrb.com/pkg/libmosquitto_1...1_imx6.ipk
https://dl.openrb.com/pkg/luamosquitto_0.3-2_imx6.ipk

Old CPU:
https://dl.openrb.com/pkg/libmosquitto_1.4.15-1_mxs.ipk
https://dl.openrb.com/pkg/luamosquitto_0.3-2_mxs.ipk

Here's a minimal example that you can use, don't forget to change device_id, broker, username and password parameters. You also need to upload azure.crt via FTP (using ftp username, upload to root directory). Certificate file contents: https://gist.github.com/jsopenrb/5873b20...d6b950151f

Code:

device_id = 'DEV_TEST'
broker = 'DEV.azure-devices.net'
port = 8883
username = 'DEV.azure-devices.net/DEV_TEST'
password = 'SharedAccessSignature ...'

mqtt = require('mosquitto')
client = mqtt.new(device_id)

client.ON_CONNECT = function(...)
 log('ON_CONNECT', ...)
 client:publish('devices/' .. device_id .. '/messages/events/', '{id=456}')
end

client.ON_PUBLISH = function(...)
 log('ON_PUBLISH', ...)
end

client.ON_LOG = function(...)
 log('ON_LOG', ...)
end

client.ON_DISCONNECT = function(...)
 log('ON_DISCONNECT', ...)
end

client:version_set(mqtt.PROTOCOL_V311)
client:tls_set('/home/ftp/azure.crt')
client:login_set(username, password)
client:connect(broker, port)

while true do
 res, err, code = client:loop()
 if not res then
   log('loop error', res, err, code)
   os.sleep(1)
 end
end

[FatMax]

Wow, brilliant!

Thanks.

Sent one more PM.

[FatMax]

I have tested this and it works just as expected.

Thank you again for your kind help.

[Duvan2127]

Thanks for the info

Can you give me information about how to load the azure.crt file?

Thank you

[admin]

Enable FTP server in System Config, then use ftp account and upload azure.crt to top level directory. Script has correct path set already.

[Duvan2127]

Enable FTP server in System Config, then use ftp account and upload azure.crt to top level directory. Script has correct path set already.

regards

Sorry for the inconvenience. I can not load the azure.crt file in the directory

[admin]

You can save crt file via a script, run once.

Code:

crt = [[-----BEGIN CERTIFICATE-----
MIIDdzCCAl+gAwIBAgIEAgAAuTANBgkqhkiG9w0BAQUFADBaMQswCQYDVQQGEwJJ
RTESMBAGA1UEChMJQmFsdGltb3JlMRMwEQYDVQQLEwpDeWJlclRydXN0MSIwIAYD
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ksLi4xaNmjICq44Y3ekQEe5+NauQrz4wlHrQMz2nZQ/1/I6eYs9HRCwBXbsdtTLS
R9I4LtD+gdwyah617jzV/OeBHRnDJELqYzmp
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBh
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CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4=
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIEMzCCAxugAwIBAgIDCYPzMA0GCSqGSIb3DQEBCwUAME0xCzAJBgNVBAYTAkRF
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Johw1+qRzT65ysCQblrGXnRl11z+o+I=
-----END CERTIFICATE-----]]

io.writefile('/home/ftp/azure.crt', crt)

[Duvan2127]

regards

You can help me with the information required to send data to iot hub de azure. I'm using a logicmachine5 reactor to monitor variables related to electrical energy, I need to send and monitor them in the cloud.

Thank you

---

Puede guardar el archivo crt a través de un script, ejecútelo una vez.

Code:

crt = [[-----BEGIN CERTIFICATE-----
MIIDdzCCAl+gAwIBAgIEAgAAuTANBgkqhkiG9w0BAQUFADBaMQswCQYDVQQGEwJJ
RTESMBAGA1UEChMJQmFsdGltb3JlMRMwEQYDVQQLEwpDeWJlclRydXN0MSIwIAYD
VQQDExlCYWx0aW1vcmUgQ3liZXJUcnVzdCBSb290MB4XDTAwMDUxMjE4NDYwMFoX
DTI1MDUxMjIzNTkwMFowWjELMAkGA1UEBhMCSUUxEjAQBgNVBAoTCUJhbHRpbW9y
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VHJ1c3QgUm9vdDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAKMEuyKr
mD1X6CZymrV51Cni4eiVgLGw41uOKymaZN+hXe2wCQVt2yguzmKiYv60iNoS6zjr
IZ3AQSsBUnuId9Mcj8e6uYi1agnnc+gRQKfRzMpijS3ljwumUNKoUMMo6vWrJYeK
mpYcqWe4PwzV9/lSEy/CG9VwcPCPwBLKBsua4dnKM3p31vjsufFoREJIE9LAwqSu
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jl0qhqdNkNwnGjkCAwEAAaNFMEMwHQYDVR0OBBYEFOWdWTCCR1jMrPoIVDaGezq1
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DQEBBQUAA4IBAQCFDF2O5G9RaEIFoN27TyclhAO992T9Ldcw46QQF+vaKSm2eT92
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jkzSswF07r51XgdIGn9w/xZchMB5hbgF/X++ZRGjD8ACtPhSNzkE1akxehi/oCr0
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ksLi4xaNmjICq44Y3ekQEe5+NauQrz4wlHrQMz2nZQ/1/I6eYs9HRCwBXbsdtTLS
R9I4LtD+gdwyah617jzV/OeBHRnDJELqYzmp
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBh
MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3
d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBD
QTAeFw0wNjExMTAwMDAwMDBaFw0zMTExMTAwMDAwMDBaMGExCzAJBgNVBAYTAlVT
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9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4jvhEXLeqKTTo1eqUKKPC3eQyaKl7hLOllsB
CSDMAZOnTjC3U/dDxGkAV53ijSLdhwZAAIEJzs4bg7/fzTtxRuLWZscFs3YnFo97
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43C/dxC//AH2hdmoRBBYMql1GNXRor5H4idq9Joz+EkIYIvUX7Q6hL+hqkpMfT7P
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YSEY1QSteDwsOoBrp+uvFRTp2InBuThs4pFsiv9kuXclVzDAGySj4dzp30d8tbQk
CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4=
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIEMzCCAxugAwIBAgIDCYPzMA0GCSqGSIb3DQEBCwUAME0xCzAJBgNVBAYTAkRF
MRUwEwYDVQQKDAxELVRydXN0IEdtYkgxJzAlBgNVBAMMHkQtVFJVU1QgUm9vdCBD
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MENBJTIwMiUyMDIwMDksTz1ELVRydXN0JTIwR21iSCxDPURFP2NlcnRpZmljYXRl
cmV2b2NhdGlvbmxpc3QwQ6BBoD+GPWh0dHA6Ly93d3cuZC10cnVzdC5uZXQvY3Js
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BQADggEBAH+X2zDI36ScfSF6gHDOFBJpiBSVYEQBrLLpME+bUMJm2H6NMLVwMeni
acfzcNsgFYbQDfC+rAF1hM5+n02/t2A7nPPKHeJeaNijnZflQGDSNiH+0LS4F9p0
o3/U37CYAqxva2ssJSRyoWXuJVrl5jLn8t+rSfrzkGkj2wTZ51xY/GXUl77M/C4K
zCUqNQT4YJEVdT1B/yMfGchs64JTBKbkTCJNjYy6zltz7GRUUG3RnFX7acM2w4y8
PIWmawomDeCTmGCufsYkl4phX5GOZpIJhzbNi5stPvZR1FDUWSi9g/LMKHtThm3Y
Johw1+qRzT65ysCQblrGXnRl11z+o+I=
-----END CERTIFICATE-----]]

io.writefile('/home/ftp/azure.crt', crt)

Gracias por la info

[admin]

Here'se a scheduled script that forms a JSON-encoded string with object values and then pushes them to Azure, then disconnects:

Code:

require('json')

data = json.encode({
  obj1 = grp.getvalue('32/1/1'),
  obj2 = grp.getvalue('32/1/2'),
})

device_id = 'DEV_TEST'
broker = 'DEV.azure-devices.net'
port = 8883
username = 'DEV.azure-devices.net/DEV_TEST'
password = 'SharedAccessSignature ...'

mqtt = require('mosquitto')
client = mqtt.new(device_id)
running = true

client.ON_CONNECT = function(stat, code, err)
  if stat then
    client:publish('devices/' .. device_id .. '/messages/events/', data)
  else
    log('mqtt connect error', err, code)
  end

  client:disconnect()
  running = false
end

client:version_set(mqtt.PROTOCOL_V311)
client:tls_set('/home/ftp/azure.crt')
client:login_set(username, password)
res, err = client:connect(broker, port)

if not res then
  log('mqtt initial connect error', err)
  running = false
end

if res then
  while running do
    res, err, code = client:loop()

    if not res then
      if running then
        log('mqtt loop error', err, code)
      end

      break
    end
  end
else
  log('mqtt connection failed', err)
end

[Duvan2127]

Here'se a scheduled script that forms a JSON-encoded string with object values and then pushes them to Azure, then disconnects:

Code:

require('json')

data = json.encode({
 obj1 = grp.getvalue('32/1/1'),
 obj2 = grp.getvalue('32/1/2'),
})

device_id = 'DEV_TEST'
broker = 'DEV.azure-devices.net'
port = 8883
username = 'DEV.azure-devices.net/DEV_TEST'
password = 'SharedAccessSignature ...'

mqtt = require('mosquitto')
client = mqtt.new(device_id)
running = true

client.ON_CONNECT = function(stat, code, err)
 if stat then
   client:publish('devices/' .. device_id .. '/messages/events/', data)
 else
   log('mqtt connect error', err, code)
 end

 client:disconnect()
 running = false
end

client:version_set(mqtt.PROTOCOL_V311)
client:tls_set('/home/ftp/azure.crt')
client:login_set(username, password)
res, err = client:connect(broker, port)

if not res then
 log('mqtt initial connect error', err)
 running = false
end

if res then
 while running do
   res, err, code = client:loop()

   if not res then
     if running then
       log('mqtt loop error', err, code)
     end

     break
   end
 end
else
 log('mqtt connection failed', err)
end

thanks for the info

With this code I could not connect to azureiotcentral.

apps.azureiotcentral.com

[admin]

You need specify correct device_id, broker, username and password parameters. Follow this guide: https://docs.microsoft.com/en-us/azure/i...tt-support

[andrepneves@gmail.com]

Hi,

I'm having trouble to connect to IoTCentral too. Is it possible to use this to IoTCentral or just with IoTHub?

[edgars]

Duvan2127 has contacted Microsoft support in this matter. Here is a reply from MS. Maybe Duvan2127  can provide further comments or tests done for this?

Step 1 : Get Connection string from the tool. It will give to Hub name
Example

C:\Users\anhashia\AppData\Roaming\npm\node_modules\dps-keygen\bin\windows>dps_cstr 0ne000475B9 mydevice ********************

...

Registration Information received from service: iotc-3d8d214e-281d-454a-9c7d-259fd8bb49ed.azure-devices.net!
Connection String:
HostName=iotc-3d8d214e-281d-454a-9c7d-259fd8bb49ed.azure-devices.net;DeviceId=mydevice;SharedAccessKey=**************

Once you have connection string, you can put in IoT SDK and you are good to go,
https://docs.microsoft.com/en-us/azure/i...-telemetry


Step 2:  Fill below paraments from Step 1  Example.


   broker: iotc-3d8d214e-281d-454a-9c7d-259fd8bb49ed.azure-devices.net
   port : 8883
   device_id: mydevice
   username:  iotc-3d8d214e-281d-454a-9c7d-259fd8bb49ed.azure-devices.net/mydevice/api-version=2016-11-14
   password:  This you will need to generate https://docs.microsoft.com/en-us/azure/i...ity-tokens. It has code snippet.




Step #5, you need to write code to generate SAS token.

[FatMax]

The certificate we use here. Does it need to renewed at some point, or is it permanent the way it is?

[admin]

One of the certificates in the chain is valid until 2025, others even more. You view certificate info here by pasting certificate data: https://www.sslshopper.com/certificate-decoder.html

[FatMax]

Ok - thank you for the info.

Have you developed any update mechanism on your end that you would like to share, or should we just write one ourselves?