Concatenating json values into a single output

Configuration
,
1

Would appreciate some guidance with the following.

I am publishing the following json string over MQTT to my HA server.

‘{“json” : {“source” : “/dev/sda1”, “target” : “/”, “fstype” : “ext4”, “size” : “28G”, “avail” : “20.2G”, “used” : “6.4G”}}’

This is received correctly and I am able to extract the individual values

Client mosqsub|9750-dnsdhcp received PUBLISH (d0, q0, r0, m0, ‘sensor/dnsdhcp/drives’, … (121 bytes))
{“json” : {“source” : “/dev/sda1”, “target” : “/”, “fstype” : “ext4”, “size” : “28G”, “avail” : “20.2G”, “used” : “6.4G”}}

However I would like to concatenate the values and display as two lines, something like the following.
Volume /dev/sda1 to / as ext4
Stats 28G, 20.2G, 6.4G

I have tried the following…

-   platform: mqtt
    state_topic: "sensor/dnsdhcp/root"
    name: "Volume"
    qos: 0
    value_template: >-
      "{{ (value_json['json'].source) }} to {{ (value_json[json].target) }}" as  {{ (value_json[json].fstype) }}

But this just produces an output of Uknown, if I just use the following for the value template

`"{{ (value_json['json'].source) }} to"`

It will display “/dev/sda1 to”

I have searched the forums and google for pointers but can’t seem to find anything that helps.

Is it possible to create a value template with concatenated json values on one single line?
Would it be possible to concatenate the two sets of values onto two lines? Or do I need to send the two sets of values as two topics?

Any suggestions greatly welcomed.

2

You overlooked to add quotes to the word json in the second and third templates.

    value_template: >-
      {{ (value_json['json'].source) }} to {{ (value_json['json'].target) }}" as  {{ (value_json['json'].fstype) }}
3

Taras, thanks for the reply.
I couldnt see the wood for the trees :smiley:

1 Like
4

You’re welcome!

Please consider marking my post (above) with the Solution tag. It will automatically place a check-mark next to the topic’s title which signals to other users that this topic has been resolved. It helps others find answers to similar questions.

5

Taras, marked as the solution and have now completed what I wanted to do, which was basically build a monitor page for my network connected devices and servers.
Thanks for your help, very much appreciated.

hanetmon
hanetmon1341×889 90.3 KB

1 Like