Stromzählerwert "INT32(3+3)" umrechnen

General
1

Hallo Zusammen.
Ich habe einen Modbus Stromzähler von B+G Tech DS100-00B. Die Spannungswerte kommen in Node-Red als "INT32(3+3)" rein. Wie wandle ich diese um damit ein sinnvoller Wert erscheint? Ich kein begnadeter Mathematiker.
Die Abfolge sieht so aus:
Rohdaten
01 04 04 00 03 73 09 EE B2

01 Device Adress
04 Functioncode
04 Anzahl der Antwortbytes

Register 4-Bytes HEX
00 03 73 09
DEC
Umgerechnet 226,057 (V)
EE Prüfsumme Hi
B2 Prüfsumme Lo
Bei vielen YT-Clips kommen die Werte aus anderen Zählern direkt heraus. Ich erwische aber einen Zähler der eine Weiterverarbeitung braucht. :thinking:
Irgendwer hat das sicher schon mal gemacht und kann mir den Weg weisen...
Gruß

2

Gelöst: INT32 --> "(3+3)" bedeutet scheinbar nur 000.000
Also drei stellen vor und drei Stellen hinter dem Punkt (Komma)

3

The buffer-parser node can help you do this (and much more) in a no-code way

image

Demo flow

[{"id":"6ff39d6e52909eed","type":"inject","z":"f504a58fa092fd5d","name":"Data [00,03,73,09]","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"[0,3,\"0x73\",9]","payloadType":"bin","x":890,"y":980,"wires":[["0d86f22f461b1632"]]},{"id":"0d86f22f461b1632","type":"buffer-parser","z":"f504a58fa092fd5d","name":"","data":"payload","dataType":"msg","specification":"spec","specificationType":"ui","items":[{"type":"uint32be","name":"voltage","offset":0,"length":1,"offsetbit":0,"scale":"/1000","mask":""}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"str","resultType":"keyvalue","resultTypeType":"return","multipleResult":false,"fanOutMultipleResult":false,"setTopic":true,"outputs":1,"x":880,"y":1040,"wires":[["e23a086b03a3ed1c"]]},{"id":"e23a086b03a3ed1c","type":"debug","z":"f504a58fa092fd5d","name":"","active":true,"tosidebar":true,"console":false,"tostatus":true,"complete":"payload","targetType":"msg","statusVal":"payload","statusType":"auto","x":910,"y":1100,"wires":[]}]
4

The problem is in front of the monitor. I only have to read the register of the electricity meter out of the user manual and work with the values .Then it works. I thought into the wrong and too complicated way.

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Node-red-forum.json (5.7 KB)