Difficult for me to debug!
Could you try adding the $serial_port variable to the error message to see what is actually set?
I’d quite like to be able to get to the root of the issue.
The $serial_port variable translates to null in the error message
@TrystanLea or @emrys - can you chip in please. If it is null I’d have expected the isset to return false and not hit this code.
@Berten_Du_Bruyn - I’ve got to the limit of my PHP I’m afraid!
@Berten_Du_Bruyn what do you see in the serial port list? Are there any serial ports listed?
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