openDTU - JSON - http post - "no values found"

[cgn]

This is something which I already tried. In this case I get the following log:

Code:

* arg: 1
  * string: {"type":"warning","message":"No values found!","code":1002}
* arg: 2
  * number: 200
* arg: 3
  * table:
   ["content-length"]
    * string: 59
   ["accept-ranges"]
    * string: none
   ["content-type"]
    * string: application/json
   ["connection"]
    * string: close
* arg: 4
  * string: HTTP/1.1 200 OK

I log "body" as well and get the following result:

 

Code:

* string: {"limit_value":"10","limit_type":"1","serial":"000000000000"}

I don't understand why the serial is still in the thrid position. I changed the code and expect the serial to be on first position. Why does this not happen?

Code:

body = json.encode({   
   serial = '000000000000',
    limit_type = '1',   
    limit_value = '10',
})

For a common understandig - although it's not shown hier in the code, I use the correct serial and IP.