Displaying String Values

[ajaywazir]

Hi
I am using Scadavis Synoptic IO panel in Grafana.
I want display some string values but unable to do so using %s.
How to write string values e.g serial number that is read from database

Ajay

[riclolsen]

Hi Ajay,
Currently (v.1.0.4), the plugin can only obtain numeric data from Grafana time series.
I intend to support String values in some future version.
Best regards
Ricardo

[ajaywazir]

Thanks

[ajaywazir]

Hi
GET property of a text element is set to TAG '%q'
How to retrieve the tag value in Scripts
I want to run some calculation on the tag value before presenting it on UI.
Regards
Ajay

[riclolsen]

Hi Ajay, you can use the !EVAL trick in place of a tag.
!EVAL expression
Evaluates a Javascript expression (use $V("TAG") to obtain tag values in the expression).
Example, to obtain the square of TAG1 value, use in the Get|TAG or in the Group Faceplate|Value
!EVAL $V("TAG1")*$V("TAG1")

[ajaywazir]

Hi,
I am not sure I get you clearly.
I think I need to be a bit clear on what I need to achieve.
Since you are not able to render string TAG values, I need to send numeric values and manipulate in SCRIPTS using pure JavaSCript like this:
var _tag_value = numeric_tag_value; //how to get from %n
var string_to_show = "SENSOR" + _tag_value ;
document.getElementbyID("text_box_1234").text(_string_to_show );

Is this possible at all. I need to retrieve numeric tag value from %n etc.
I tried this on mouse_down event
console.log ("Hello Testing"); // works ok
console.log (!EVAL $V("TAG1") ; throws error
console.log ($V("TAG1") ; Also throws error
console.log ($V("%n") ; Also throws error
Thanks
Ajay

[riclolsen]

Maybe an example can be clearer:
https://codepen.io/ricardolo/pen/NWxWoKz
The 2 bottom values are produced with !EVAL in the faceplate tab.
The second is a string concatenated with value as you need.
The SVG file is here
https://raw.githubusercontent.com/riclolsen/displayfiles/master/evaltest.svg

[ajaywazir]

Thanks.
I got it running...
I have one more question
How to create a fault dictionary where number of items is more than 8
for tag with less than 8 different values, I can use TEXT to translate values to text
I have a 32 bit error code, with each bit denoting a particular error

How to do this in javascript? Any suggestions

Thanks in advance

Ajay

[riclolsen]

Yes, TEXT won't do it for more than 8 values.
There are many ways to do it, but a simple one can be using the same !EVAL expression as in the previous case.
You can test each bit and return the corresponding text.
Like in
!EVAL if ($V("@1")&0x01) { "TEXT FOR BIT 0" } else if ($V("@1")&0x02) { "TEXT FOR BIT 1" }

[ajaywazir]

Hi
Thanks
I will give it a try
Ajay

[ajaywazir]

Hi
I tested it
I am using a model based tags. my %q is derived from face plate
!EVAL if ($V("%q")&0x01) { "TEXT FOR BIT 1" } else if ($V("%q")&0x02) { "TEXT FOR BIT 2" }
only first if condition is evaluated
I believe, %q is not re-evaluated after ist evaluation.

I also tried
!EVAL
var tt = $V("%q");
if (tt&0x01) {
"TEXT FOR BIT 0"
}
if (tt&0x02) {
"TEXT FOR BIT 1"
}
if (tt&0x04) {
"TEXT FOR BIT 2"
}
This also did not work
Is there another way?

Ajay

[ajaywazir]

Hi
This works for me
!EVAL
var tt = $V("%q");
if (tt&0x01) {
"TEXT FOR BIT 0"
}
else if (tt&0x02) {
"TEXT FOR BIT 1"
}
else if (tt&0x04) {
"TEXT FOR BIT 2"
}
else
{"KK"}

However, this works with only 1 tag (First one only)
var tt = $V("%q");
var tt2 = $V("%r");
tt2 is always evaluated to 0.

Consequenty, this one also does not work as the 2nd instance of %q is always evaluated to 0
!EVAL if ($V("%q")&0x01) { "TEXT FOR BIT 1" } else if ($V("%q")&0x02) { "TEXT FOR BIT 2" } else
{"KK"}

Thanks and Best Regards
Ajay

[riclolsen]

Hi AJay,
Confirmed, the !EVAL expression when applied inside a group with indirect variables as in %n, %q... substitutes only the first one, others will cause undefined behavior. It works if you do not use multiple variables in the same expression. I must solve this problem in some future version.
For now, I recommend using !EVAL with multiple tags only in the faceplate of the top-level group. With this, you can achieve the same desired results.
Thanks for spotting this!
Best regards,
Ricardo

[ajaywazir]

Hi Ricardo,
Thanks.
let me try to give the faceplate EVAL a spin

Regards
Ajay

[justinozavala]

Hello, is the string display still an issue in version 2.0.2? thanks

[riclolsen]

Hi Justino.
Yes this is still a limitation.
The plugin can only retrieve numeric values from Grafana queries.