Hi Everybody, For a project I’m working on, I’m connected to an IMU sensor through my computer’s USB port. I’m using pyserial to read in the data. I’m able to successfully run and print the data to my console when I change the BooleanSwitch from off to on, however, I haven’t figured out a way yet…

Could you not use a boolean to make sure that serial communication is only set once? firstTime = True ser = 1 def beginSerialNow(): global ser global firstTime if firstTime: firstTime = False ser = serial.Serial(port='COM4',baudrate=2000000,timeout=0,) print(ser.r…

I am new to Dash so this comment may not be applicable, but doesn’t the documentation explicitly state not to use global variables?

How to properly open and close a serial connection using dash_daq.BooleanSwitch()?

Dash Python

bens44 September 1, 2020, 4:06am 4

Hi @TollisH,
Thanks for the comment. Yes, you are correct about the global variabables not being recommended. FYI, I was able to solve the issue using flask-caching. See the related post here:

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How to properly open and close a serial connection using dash_daq.BooleanSwitch()?

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