How to write variable from flow in cube-monitor?

[KJeps.2]

I think this page would have the content:

https://wiki.st.com/stm32mcu/wiki/STM32CubeMonitor:How_to_write_a_variable_from_flow

It seems that hashKey value can not be read out somewhere?

{"variablelist":[{"address":"{{flow.current_limit_adr}}","name":"current_limit","type":5,"checked":true,"$$hashKey":"object:604","value":"{{payload}}","validity":true}],"accesspoint":0}

(I know how to use the write panel - but need to set 1 variable with value from flow)

[stephane.legargeant · Accepted solution]

Hello

To write data by flow, the following payload must be sent to probe out node ,with the topic “write�? :

{

   "variablelist": [

       {

           "address": "0x20000060",

           "type": 4,

           "value": "xxxx"

       }

   ],

   "accesspoint": 0

}

 The question has been asked in this topic : https://community.st.com/s/question/0D53W000000ayg1SAA/hello-how-is-it-possible-to-change-a-variable-by-pressing-a-buttoni-just-can-change-a-variable-by-using-the-write-panel-butregards

The post explains with details how to write variable from the flow without using the write-panel. It should answer you point.

We are preparing a wiki page, but it is not finalized yet. So there is just a placeholder right now on the wiki.

best regards

Stephane

[KJeps.2]

Thanks.... I only forgot the "write" topic :(

"$$hashKey":"object:604"

"validity":true

These 2 is for no use?

/Kasper

[stephane.legargeant]

You don't need to take care of "$$hashKey" and "validity" to write from flow.

Stephane

[KJeps.2]

Got it - and stuff is working.

This is really a good and powerfull tool you have produced here - Thank you!!

Just as a feedback, i had some problems with adding 2 variables blocks to select different variables, then it uses the same exe config, and mixes up the variables between them.... i ended up using only one variables block and manual parse them out.

On the other hand i could have made several variabel blocks, and connect direct to chart.

/Kasper

[Rghai.1]

Hello,

I follow the instruction and i receive this error:

 "Bad parameter (7)"

msg : string[264]

"Unsuccessful write (Bad parameter (7)) on 48FF6E064986484820270787, for data = "{\n \"variablelist\": [\n {\n \"address\": \"0x20000000\",\n \"type\": 3,\n \"value\": \"3678\"\n }\n ],\n \"accesspoint\": 0\n}": write"

Do you know what's wrong with it? I check the address and i type and they are correct.

[stephane.legargeant]

Hello

I thing the \n in the log are strange.

Can you compare with the wiki example here : STM32CubeMonitor:How to write a variable from flow - stm32mcu ?

Take care to set the output of "template" node to "parsed JSON".

If not ok, can you insert a debug node after "set topic" node to see what is sent to the node "myProbe_Out" ?

Please let us know the result.

Best regards

Stephane

[Rghai.1]

Hello,

I do the same work as the link, this is my basic flow .

thank you

[stephane.legargeant]

Do you mean that it is still not working ?

If it is not working, could you share your flow with me ? (at least export the nodes on the top part)

Best regards

Stephane

[Rghai.1]

Hello

@stephane.legargeant​, it still not working .