Download Arduino | Openwire.h Library

No library named OpenWire.h is available in:

If you found a reference to OpenWire.h, it’s likely one of these cases:

#include <OpenWire.h>
OpenWire::Event myEvent;
void setup() 
  Serial.begin(9600);
  myEvent.add([]() Serial.println("Event fired"); );
  myEvent.invoke();
void loop() 
  // ...

Arduino IDE 1.8.10+ and 2.x

#include <OpenWire.h>
OpenWire wire(&Serial);
void onCommandReceived(byte cmdId, byte* data, byte len) 
if(cmdId == 0x01) 
int receivedValue;
memcpy(&receivedValue, data, sizeof(receivedValue));
Serial.print("Received sensor value: ");
Serial.println(receivedValue);

void setup() 
Serial.begin(115200);
wire.begin();
wire.setCallback(onCommandReceived);  // Register callback

void loop() 
wire.process();  // Must be called frequently
 openwire.h library download arduino

If a file named openwire.h is found on third-party forums, personal blogs, or file-sharing sites:

Recommendation: Do not download openwire.h from any site that is not the official Arduino Library Manager or a verified GitHub repository of a known author. No library named OpenWire

Meta Description: Struggling to find the openwire.h library for your Arduino project? This guide explains what OpenWire is, where to download it safely, common errors (like “openwire.h: No such file”), and step-by-step installation instructions for Arduino IDE 1.8.x and 2.x.

Before you rush to download the library, it is crucial to understand why OpenWire exists.