How to use the serail library to send a command to an USB device

Core Library Questions

snowcrash..

in Core Library Questions • 1 year ago

Hi,

I want to command a device using usb serail message.

Message should be send in this format : $CMD,tttt,cc

here an example in Python : device .write('$CMD,01C2,01')

But when I try on processing : myPort.write('$CMD,01C2,01\n');

I got a "Badly formed character constant" message

Any ideas???

Replies(1)

kritzikra..

1 year ago

in java the single quote is a single character literal,

so you can only have 'a', '$' and the like,

what you want is a string literal, which in java always uses double quotes:

"abcd"

i know this must be confusing coming from other languages,

but in java single and double quotes are actually different data types,

so "a" and 'a' are different things.

best,

hansi.

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