To clear up a common point of confusion, there is no official or widely used library called for the Arduino. The error openwire.h: No such file or directory typically occurs because of one of the following mix-ups: 1. You likely mean Wire.h

#include <OpenWire.h>

If you are using Visuino to generate your code, the necessary

Now that OpenWire.h is installed, let's write a basic send/receive example.

void loop() // ...

#include <openwire.h>