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  1. I have had no success communicating with serial ports using PowerShell under Ubuntu 18. I can create the port object: $port = new-object system.io.ports.serialport ttyACM0 And I can use "Echo $port" to view all the specifics of the com port. But when I attempt to open the port: $port.open() I get a message that says "access denied". I never encounter this error using PowerShell under Windows. Any idea how to fix this?
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