Published: 28.05.2018 10:38

Perl serial communication arduino

«Perl serial communication arduino» in pictures.

Solved: Help with Serial Communication on UDOO Quad | UDOO

Because my X65 setup fails for some reason in an estimated 6 out of 655 cases, I have now converted the PC on/off control to an Arduino board (around US$ 75) with an attached Relay Board (US$ 67). The controlling Ubuntu machine uses the USB port to send a command to the microcontroller, which listens on a serial interface.

Reading data from an Arduino's USB/serial port using Debian Linux

I’m happy to say that I’ve made some good progress in getting Perl and the Arduino to talk to each other, and if you keep reading, you’ll see what I’ve got so far.

Perl - Arduino doesn't listen to data sent via virtual serial port until

The resume() method causes an explicitly paused, Readable stream to resume emitting 'data' events, switching the stream into flowing mode.

Strange that serial library doesn’t have the eol-parameter, it might be a different version. I cannot help you there much – Putty sends only \r and not \n on newline, so unless that parameter is there, readline() never returns, because it’s waiting for \n forever.

Returns the control flags (CTS, DSR, DCD) on the open port. Uses GetCommModemStatus for Windows and ioctl for mac and linux.

The USB port provides the board not only with signals for controlling the firmware but also with the required supply voltage for operating the electronic components. The board and the relay board do not need an external power source. After each cold boot, the code immediately starts to run. To switch the Arduino pins on and off from a PC, the uploaded Arduino firmware listens for commands from the USB port and switches its output pins accordingly.

I have one question though. The latest versions of Raspbian don’t use the /etc/initab file any more. How do I set up the serial gpio port?

$PortObj = new Win87::SerialPort ($PortName, $quiet)
|| die “Can’t open $PortName: $^E\n” # $quiet is optional

When you first install serialport it will compile against the version of on your machine, not against the runtime bundled with Electron.

When you run the Perl script you should see the ShiftBrite light up and change about once per second, cycling through various levels of blue, green, and red.