Modbus 32 Bit Float to an INT

[bceyresy]

Hi,

I have a power meter which I am pulling readings from via Modbus TCP. The data is in float & I need to put the 2 registers together then convert it to an integer.

just a note, I had to click the data in the array to toggle to Hex values.

Please can someone help on the best way around this.

please see screen shots.

[UnborN]

Hello ..

you can use the node-red-contrib-buffer-parser node to do the conversion to float

Example Flow

[{"id":"2b690201c6ec9725","type":"function","z":"ee297f7b.69fda","name":"modbus fake data","func":"\nmsg.payload = Buffer.from([0x43, 0x74, 0x27, 0x0C])\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":470,"y":840,"wires":[["0dafbe21373e14c5","62ecced6b754b480"]]},{"id":"60815d2eb8942be6","type":"inject","z":"ee297f7b.69fda","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":280,"y":840,"wires":[["2b690201c6ec9725"]]},{"id":"dfb04119cbbb73a8","type":"debug","z":"ee297f7b.69fda","name":"debug 2","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":900,"y":840,"wires":[]},{"id":"0dafbe21373e14c5","type":"buffer-parser","z":"ee297f7b.69fda","name":"","data":"payload","dataType":"msg","specification":"spec","specificationType":"ui","items":[{"type":"floatbe","name":"item1","offset":0,"length":1,"offsetbit":0,"scale":"1","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":710,"y":840,"wires":[["dfb04119cbbb73a8"]]},{"id":"62ecced6b754b480","type":"debug","z":"ee297f7b.69fda","name":"debug 1","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":600,"y":760,"wires":[]}]

If you wire the top modbus output to Buffer parser, the actual buffer will be in

So set that msg Property in the node's config instead of msg.payload

[bceyresy]

Thanks so much. What a great little tool. Much appreciated