I am streaming data to my broker from a microcontroller using the following format: "1234567890123;1234" the first part of the message is a long epoch the second my data. (I am not relying on the broker timer) I have sparsed the data in a function node with 2 outputs: var msg1={}; var msg2={}…

Hi @sylvanoMTL Firstly, regarding this... [image] sylvanoMTL: I am streaming data to my broker from a microcontroller using the following format: "1234567890123;1234" You would benefit greatly from sending valid JSON from your controller - then there would be no need to split values & if y…

Many Thanks Steve, with a T as it opened my eyes. For templating data for the chart, I have tried this things that works too. var buffer=msg.payload.split(";"); var m = [ {topic:"X", timestamp:Number(buffer[0]), payload:Number(buffer[1])} ]; return [m]; I am not familiar with JS but I gue…

50ms is a bit much. What do you hope to see / achieve with data moving across the screen so quickly? It might look cool but I can see what benefits you'd have over updating say every 1s or every 1min?

Hi Steve, I am not sure if I will use node-red to display live-data. I have discovered node-red last winter and started to scratch some ideas with it. Display seems to be the main limitation so far.. But I need to display the data. I expect to measure displacement at possibly 1Hz-2Hz. I see diffe…

Hi-speed processing isn't necessarily Node-RED's forte. You would probably be better off sending the data direct to InfuxDB and using Grafana to produce a suitable chart. There is no way any human is going to get anything useful out of such fast updates in real-time. InfluxDB is a time-series db and…

Parse and plot MQTT data on a chart

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Parse and plot MQTT data on a chart

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