arduino software serial and wire library

A problem arises though if we connect the RX / TX pins (pins 0 and 1) of the Arduino to another device or shield. All you need to check now is that the baud rate is set to the same value as we specified in the script (9600 in our case). To receive this data while the sketch is running, we need to open Serial Monitor on the Tools menu (shortcut Ctrl+Shift+M). UART enables serial communication over USB. This is enabled by the UART device on the Arduino’s chip. This data now gets sent over USB to the connected PC. All we need to do is open the Serial port at a specified baud rate. This is pretty straight forward through the Serial API.

Since Arduinos usually don’t come with a display where output can go to, we usually use serial (COM) communication to receive debug output. But how can we receive this data? Using Serial Monitor Especially on devices like Arduino where we normally deal with short sketches, printing information about the program’s state works reasonably well.

It’s not elegant, it’s not pretty but it often gets the job done.

Let’s admit it, we all have written that kind of code. It commonly works like this: printf('here 1') Debugging an Arduino sketch usually happens in a way that is often referred to as “ printf debugging”.

Arduino software serial and wire library