+- Virtuino Forum (https://virtuino.com/forum)
+-- Forum: Virtuino (https://virtuino.com/forum/forumdisplay.php?fid=1)
+--- Forum: Virtuino IoT (https://virtuino.com/forum/forumdisplay.php?fid=2)
+--- Thread: How to get values from a Json message (/showthread.php?tid=117)
How to get values from a Json message - JCJunior - 05-28-2022
Dear,
Is there any example of how to configure the MQTT variables for data viewing?
The topic I'm reading returns the following JSON:
{
"results" : [ {
"name" : "Temperatura",
"value" : 24,
"timestamp" : 1653760447,
"description" : "",
"unit" : "°C"
} ]
}
How do I configure the variable to read the temperature value?
RE: Settings for value readings - iliaslamprou - 05-29-2022
Hi,
I am sorry, I don't have a tutorial yet.
It is very easy to do it.
I have uploaded your json text to the hiveMQ broker to the topic: virtuino_test
1. Create a new project
2. Add the default Virtuino MQTT connection to the broker HiveMQ
3. Enter the sub topic: virtuino_test
4. Go to the broker variables. Select the variable V0. Select as sub topic the "virtuino_test" topic
5. On the field "Value Json path" enter the follow path
results[0]/name
Insert a "Value display" to read the V0
Then connect and check the results
The results[0] returns the first json item of the results array
The name returns the value of the json field name
RE: Settings for value readings - Andrey_iv - 11-08-2022
Hi,
I have a similar problem. How to get value from array?
{
"dio" : {
"do" : [ 0, 1, 0, 0, 0, 1, 0 ],
"ro" : [ 0, 0, 0, 0, 0, 1, 0 ],
"di" : [ 0, 0, 1, 0, 1, 0, 0, 0 ]
}
}
I did this: dio/ro[0] (Error:No value for ro[0])
RE: Settings for value readings - iliaslamprou - 11-08-2022
Hi,
I have check with the latest version 0.1.0
It works fine!
Check for errors in Json message
I have created a video about it
https://youtu.be/ukBEXHhDvF4
RE: Settings for value readings - Andrey_iv - 11-09-2022
Hi iliaslamprou,
Thank you for the video. I forgot to say that I tried to do this in Virtuino MQTT in 1.0.36
Now I'll try to install Virtuino IoT.