I have a some troubles with the communication between my Arduino Mega and my Computer when using serial COM port. When I send data with the arduino serial monitor, it will identified as correct command( a correct command ist 8 bit long an begins with a # and ends with a #). But wehn is send data with another serial monitor or an C-code that uses the serial port the code isn't indentified as correct(it receives, but not the right characters). So my question is, are there other characters to be send? Before/After? So that my Arduino will accept it?