Can't connect to external server via mqtt

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Hi guys,

I’m trying to connect pimatic to intelliweb.mastervolt.com via mqtt but i can’t get a connection. This works for me:

mosquitto_sub -h intelliweb.mastervolt.com -p 8883 --cafile /etc/ssl/certs/ca-certificates.crt --username me@domain.com --pw MYPASSWORD -v -t ‘/IntelliWeb/v1/account/me@domain.com/devices/PRODUCTNR_SERIALNR/monitoringData’

However, this:

        {
          "brokerId": "mastervolt",
          "host": "intelliweb.mastervolt.com",
          "port": 8883,
          "certPath": "/etc/ssl/certs/ca-certificates.crt",
          "username": "me@domain.com",
          "password": "MYPASSWORD"
        }

Results in this in the logfile:

12:15:00.580 [pimatic-mqtt] info: MQTT Broker mastervolt is offline
12:15:16.124 [pimatic-mqtt] info: Reconnecting to MQTT Broker mastervolt
12:15:17.247 [pimatic-mqtt] info: Reconnecting to MQTT Broker mastervolt
12:15:18.376 [pimatic-mqtt] info: Reconnecting to MQTT Broker mastervolt

I saw this thread but it’s not clear to me what the solution was:

Re: connect Pimatic to Victron-server via MQTT

Can anybody give me a hint to what i’m doing wrong?

@fregger I am sure @wutu can help out here.

• Did you already try to run the debug mode as advised on the other thread.
• Presumably it is a credentials problem. Maybe you need to import the peer CA?!
• You may also want to try to establish a tcp connection intelliweb.mastervolt.com on port 8883. I have used the telnet client for this purpose but there many alternatives tools like “nc” you can use for that. Btw, in my setup I am able to connect to the given endpoint.

For reference: The IntelliWeb external MQTT API can be found if you google “IntelliWeb external MQTT API”.

@mwittig Thanks for your swift reply. The debug mode doesn’t give me any extra clues. When I use mosquitto_sub it gives me exactly what I expect:

/IntelliWeb/v1/account/me@domain.com/devices/PRODUCTNR_SERIALNR/monitoringData {"Timestamp":1517575079383,"DeviceID":"PRODUCTNR_SERIALNR","DC":[{"DCInID":1,"V":132.8,"I":2.4,"P":318.84}],"AC":[{"Phase":1,"V":234.7,"I":1.29,"P":299}],"Fac":49.97,"E":623.4,"T":25.95}

So I’m halfway there, thanks to the document ‘IntelliWeb external MQTT API’ you pointed me to a couple of months ago. I just can’t figure out why I can’t connect with pimatic…

@fregger I think you are using the wrong property. Use "ca" instead of "certPath" and give it a try

@mwittig thanks. But unfortunally that doesn’t help either.

@mwittig However, if i put the path to the *.crt file in all the fields ‘certPath’, ‘keyPath’ and ‘ca’, i do get a connection:

16:50:50.552 [pimatic-mqtt] info: Successfully connected to MQTT Broker mastervolt

Thanks a lot, you got me going again Since the sun is going down and the inverter shuts down without power, i’ll fiddle on tomorrow to make the devices.

So far, so good. This gives me the connection with the mastervolt broker:

{
  "plugin": "mqtt",
  "active": true,
  "brokers": [
    {
      "brokerId": "default"
    },
    {
      "brokerId": "mastervolt",
      "host": "intelliweb.mastervolt.com",
      "port": 8883,
      "clientId": "me@domain.com",
      "reconnect": 60000,
      "username": "me@domain.com",
      "password": "MYPASSWORD",
      "rejectUnauthorized": false,
      "certPath": "/etc/ssl/certs/ca-certificates.crt",
      "keyPath": "/etc/ssl/certs/ca-certificates.crt",
      "ca": "/etc/ssl/certs/ca-certificates.crt"
    }
  ]
},

And with this i get the message that the inverter is switched on:

{
  "name": "Solarpower",
  "id": "solarpower",
  "class": "MqttSensor",
  "attributes": [
    {
      "name": "Status",
      "topic": "/IntelliWeb/v1/account/me@domain.com/devices/PRODUCTNR_SERIALNR/status",
      "type": "string",
      "messageMap": {}
    }
  ],
  "brokerId": "mastervolt",
  "xAttributeOptions": []
},

But I’m struggling with the JSON message with hierarchy. I’m rather new with mqtt. What I’m really interested in, is the AC power output. How do i translate this from the following mqtt message into the pimatic device?

{"Timestamp":1517489902908,"DeviceID":"PRODUCTNR_SERIALNR","DC":[{"DCInID":1,"V":111.6,"I":0.24,"P":27.34}],"AC":[{"Phase":1,"V":233.3,"I":0.18,"P":25}],"Fac":50.01,"E":622.96,"T":18.96}

Never mind, i got it!

    {
      "name": "AC.0.P",
      "topic": "/IntelliWeb/v1/account/me@domain.com/devices/PRODUCTNR_SERIALNR/monitoringData",
      "type": "number",
      "unit": "Watt",
      "acronym": "AC out",
      "messageMap": {}
    },