How to change the serial port in rosserial for the arduino to publish to

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I don't know the solution, but I'm pretty sure "it errors" won't be sufficient description for anyone else to help you.

Sorry about not including the error. When I follow the tutorial exactly, by adding ros.h and the arduinohardware file, I get the error:

In file included from    /Users/nbaddorf/Documents/Arduino/TempForumChaingeRosserialPort/TempForumChaingeRosserialPort.ino:6:0:    /var/folders/2t/1ymz5b_d0x59sqrw7rfsvnkh0000gn/T/arduino_build_44793/sketch/ros.h:4:29:    fatal error: ros/node_handle.h: No    such file or directory compilation    terminated. Error compiling for board    Teensy 4.1.

When I saw this error, I tried copying over all the files in the rosserial library into my current sketch folder. When I try running that, I get this error:

Oops, the forum won't let me post it, due to its length.

Ok, so the error I get from the running the sketch with the ros library inside is:

In file included from /var/folders/2t/1ymz5b_d0x59sqrw7rfsvnkh0000gn/T/arduino_build_44793/sketch/ros.h:38:0,
                 from /Users/nbaddorf/Documents/Arduino/TempForumChaingeRosserialPort/TempForumChaingeRosserialPort.ino:6:
/var/folders/2t/1ymz5b_d0x59sqrw7rfsvnkh0000gn/T/arduino_build_44793/sketch/ros/node_handle.h:40:27: fatal error: std_msgs/Time.h: No such file or directory
 #include "std_msgs/Time.h"
                           ^
compilation terminated.
Error compiling for board Teensy 4.1.

It seems that the tutorial for changing the rosserial serial port no longer works. I am using a slightly modified version of the library by James Bruton, to make it compatible with the teensy 4.1, but he showed me the files that he changed, which were small changes like increasing the buffer for sending messages. Thanks for your help!