grp.checkwrite / grp.checkupdate

[Dré]

I had the idea grp.checkwrite / grp.checkupdate don't work always.
Are there limitation about when I can use it and when not?
Maybe not all datatype?

It looks like it doesn't always update the new value or do I look wrong?

I understand grp.checkwrite is when it has to write to the KNX bus
and grp.checkupdate if it is just local for the LM.

[Daniel]

grp.checkwrite is sending to TP and IP but on change of value. grp.checkupdate is sending only to IP but also on change of value.

[Dré]

Oké thanks.

I think my problem was also not the right data type.

[sx3]

and grp.write always send the value on TP and IP, even if the value inside LM is up to date?

[admin]

and grp.write always send the value on TP and IP, even if the value inside LM is up to date?

Yes

[Dré]

No I remember what was going on, on my site;

This is my line in my log
   

this is what the current logs said about the value

Code:

P1 HomeWizzard [new and updated] 02.01.2023 12:57:03
* string: returned_total: gr: 51/0/11 = 9434.957

this is a part of the script I use

Code:

        --Reading electricity delivered by client (Tariff 2) in 0,001 kWh            14.4 byte    
        --Teruggeleverd Elektriciteit Tarief 1
  returned_tarrif2 = data:match'1-0:2.8.2%((%d+.%d+)'   
  returned_tarrif2 = tonumber(returned_tarrif2)
   --log("returned_tarrif2: " ..returned_tarrif2)
  grp.checkupdate('51/0/10', returned_tarrif2)        --
--------------------
     returned_total =   returned_tarrif1 + returned_tarrif2
     grp.checkupdate('51/0/11', returned_total)        --   
log("returned_total: gr: 51/0/11 = " ..returned_total)   

My question is, is there a reason why he doesn't update the value?
It looks like they are not the same, behind the dot.

[admin]

For floating point values default delta is 0.1. The difference between values is lower in your case.

[Dré]

Oké thanks, does it means I need to take another data type for solving this problem?

[admin]

The value will update when the difference is large enough. You can also specify delta manually as the third argument. Try 0.01 or 0.001

[Dré]

Sounds interesting, do you have an example of this?

[admin]

Code:

grp.checkupdate('51/0/10', returned_tarrif2, 0.01)

[Dré]

Great tanks, that was what I was looking for ?