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Engineering Mathematica Dynamic Interactivity External Programs and Systems Wolfram Language Connected Devices

How can I make dynamic or live gauges from serial data stream?

Leif Summerfield, ESI

Posted 9 years ago

Newish to Mathematica, first post, yadayada... So I have an Arduino pushing serial data in super simple format (Arduino code snippet is Serial.println(Analog0_value);) I've opened the comport in Mathematica, interpreted the input stream and can display a live/dynamic number from the Arduino. But...I can't get the live behavior into a simple Guage!? what gives? port = "/dev/tty.usbmodem1411" dev = DeviceOpen["Serial", {port, "BaudRate" -> 9600}] out := Dynamic[FromCharacterCode[DeviceReadBuffer[dev, "ReadTerminator" -> 10]]] So far so good: out shows a live value that corresponds to the analog value on Analog0 input of the Arduino. now the fail: AngularGauge[out, {0, 100}] Any permutation I've tried I never get the gauge to light up with my live data. I may get just (changing number here),{0,100} for example. Thoughts!?

POSTED BY: Leif Summerfield

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Posted 9 years ago

M -It's good to see live data being so verbosely plotted, nice job! I just found the debug note telling me what I'm doing wrong...duhhhh Something about (i'm guessing) the command terminator is not getting process properly. I get this" Tag FromCharacterCode in FromCharacterCode[{49,51,13}] is Protected. >> " Which, silly me I was trying to plot a String...not a number. So one "ToExpression" later and Bingo!!! I'm plotting live. Thanks for your examples, and keep up the good work.