Hi all, I'm new at node red and spent a lot of time with reading here. My problem is that I have an arduino sending some data to serial port of my raspberry but I can not decode / show them right. The arduino is measuring and calulating at some analog ports and the results are written to serial port. This works with a different Software good for many years. I want to build a new GUI to show this data in dashboard. The data which will be written by arduino is a mix from float int and boolean. //Data to transmit to Raspberry PI3 State state = { .vdc12 = VDC12, //this is float .vdc5 = VDC5, //this is float .adc12 = ADC12, //this is float .pson = PSON, //this boolean .fanon = FANON, //this boolean .error = errormsg // this is int }; Serial.write("STATE:"); int size = sizeof(State); char* st = (char*) malloc(size); memcpy(st, &state, size); Serial.write(st, size); Serial.write("\n"); free(st); Serial.flush(); Com Port is working and I can debug the output and read State: and then of course nothing useful. I installed contrib-buffer-parser to parse the the serial message. Configuration seems not to be too complicate but I'm hanging. I add 7 items with fan enabled and connected them to 7 text nodes I want to show in dashboard. Item 1 ascii length=6 Offset=0 At the dashboard I can read "State:" so this is ok, great! Item 2 float(le) length=4 offset=6 Item 3 float(le) length=4 offset=10 ... I can not read any valid data, it should be two voltages with 12V and 5V so numbers should be 12,425 and 5,251 for example. Any hints how to get my valid results shown?

ok, that struct is different to the first one - but it still doesn't match the example data you sent. If you aren't accurate in your information - I cant really help! Instead, I have knocked up a demo to show you. I used your (new) Status struct, added some demo data & spit out the decimal values to generate "fake serial" data & setup the buffer parser to show you how it works... [image] [{"id":"f3075837afc8ecaa","type":"buffer-parser","z":"484d58c6fda0204f","name":"","data":"payload","dataType":"msg","specification":"spec","specificationType":"ui","items":[{"type":"ascii","name":"name","offset":0,"length":7,"offsetbit":0,"scale":"1","mask":""},{"type":"floatle","name":"poutForwardPeak","offset":7,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"floatle","name":"item3","offset":11,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"floatle","name":"item4","offset":15,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"floatle","name":"item5","offset":19,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"floatle","name":"item6","offset":23,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"floatle","name":"item7","offset":27,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"floatle","name":"item8","offset":31,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"floatle","name":"temperature","offset":35,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"int32le","name":"band","offset":39,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"floatle","name":"vdc50","offset":43,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"floatle","name":"vbias","offset":47,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"floatle","name":"vdc12","offset":51,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"floatle","name":"vdc5","offset":55,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"bool","name":"pson","offset":59,"length":1,"offsetbit":0,"scale":"1","mask":""},{"type":"bool","name":"fanon","offset":60,"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":true,"setTopic":true,"outputs":1,"x":1350,"y":220,"wires":[["54d926f325b7f150"]]},{"id":"54d926f325b7f150","type":"debug","z":"484d58c6fda0204f","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":1390,"y":300,"wires":[]},{"id":"2d04bdd0af29ff2f","type":"inject","z":"484d58c6fda0204f","name":"fake serial data","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"[83,84,65,84,85,83,58, 205,204,140,63,205,204,12,64,51,51,83,64,205,204,140,64,0,0,176,64,51,51,211,64,102,102,246,64,205,204,12,65,231,3,0,0,82,56,74,66,127,242,118,68,207,247,65,65,207,247,159,64,0,1,0,0,123,0,0,0 ]","payloadType":"bin","x":1240,"y":160,"wires":[["f3075837afc8ecaa"]]}] I'' leave the other bits for you to fill in / sort out.

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Serial Data Parser / Decoding

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