Removed '.' as delimiter because it prevents passing floating point arguments. #6
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New versions of the Arduino IDE throw a compiler warning
if you pass a const char * aka string literal ("hello world") to
a char * function argument. This commit changes the prototype to
take a const char *.
The examples did not compile since cmdInit was changed to accept a Stream reference instead of a serial port speed. This change fixes all examples. It also adds a new function cmdGetStream(). This allows command functions to get access to the same stream that is used by the command interpreter itself. If you change a sketch from using the serial port to using a different stream, you can simply change the initialisation of the cmd module and all command functions can remain unchanged. The commit also contains a fix to ignore \n characters as they are usually not part of a valid command. This way, the code works with all terminals, no matter if they send \r or \r\n line endings.
Remove compiler warning, fix examples
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