What does PuTTY send when I press Enter key?
arduino, ascii, control-characters, putty
Solution
Interestingly, I can report the opposite on Win 7: PuTTY for me and my embedded project is sending ONLY `\r` over the COM port. Curious, read: frustratingly unexplainable, but I simply look for either character on the other end of the serial connection.
Then, if you enable "Implicit LF in every CR" under Terminal options it will send both `\r\n`. Default behaviour seems to be akin to a Commodore machine :D (http://en.wikipedia.org/wiki/Newline). who knew...
Problem
I am trying desperately to get a Bluetooth dongle working with my Arduino but I can't send it a command that it needs. I can use it when I plug it into my computer via a USB to UART chip and send the command (`C`) from PuTTY and then press `Enter`. The Bluetooth dongle's command sheet says that the command I am trying to send it `C<cr>` but I can't figure out how to send the proper carriage return character from the Arduino code. I have tried using the `Serial.println()` function as well as adding the `\r` character to my current `Serial.write("C\r")` but neither of those are working. How can I achieve this?