Using the serial monitor that is built into the Arduino IDE (Integrated Development Environment, aka desktop software), write a program that reads in a value and echoes back the same value.

To do so, the Arduino was set up to monitor the BUSY line on the printer’s parallel port, setting the CTS line active whenever the busy line was inactive.

You can even get to the serial monitor, all in your browser with no actual Arduino hardware. You can also build simple circuits that don’t use an Arduino, although the component selection is ...

Usually, I use the Serial Monitor of the Arduino IDE to communicate with the Arduino hardware. But now, I want to build an application on my computer that allows me to click some buttons to control ...

Connect the Arduino to your computer using the USB cable. Open the Serial Monitor in your IDE to see the values from the sensor – this will also help you to calibrate your plant monitor.

Why Arduino Is a Hit With Hardware Hackers For electronics hobbyists, the open source chipset BeagleBoard that packs as much punch as a smartphone processor might seem like the key to paradise.