![]() How can I change it, and how can I get it to change permanently. Once the connection is opened, it can send data to the serial port, and read answers (reading is only implemented for Linux). It takes the path (like '/dev/ttyS0' for linux or 'COM1' for windows) of serial device and checks whether it is valid before opening a connection to it. This class can be used to communicate with a serial port under Linux or Windows. So I can access it like localhost/serialport/index.php it will return the data. I'm working on linux machine so I can do the serial port reading with PHP itself, In. Read serial port with PHP? Yea some time we may face such a. No error messages, but no permission change either. However, it reverted back as soon as I restarted my computer, and if I now try to use the command: sudo chmod 666 ttyACM0 nothing happens. So I can access it like localhost/serialport/index.php it will return the data. ![]() Someone (who is no longer in the area to help me) swapped the permissions to 666, which made it all work gloriously. In the dev folder, the port I need is listed as permission 166. ![]() This made the IDE work correctly, but I lost the ability to use the correct serial port. It has worked in the past, but for reasons that may be unnecesary, I felt the need to change the ownership of some of the files from root ownership to my users ownership. I'm using the Arduino IDE in Ubuntu, and am having issues with the serial port. ![]()
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