// Create an OpenWire object on Serial (UART) OpenWire wire(&Serial);
You don't need to download it; it is included by default with the Arduino IDE VirtualWire Library (Legacy RF) openwire.h library download arduino
void setup() radio.begin(); wire.begin(); wire.setCallback(handleMotor); // Create an OpenWire object on Serial (UART)
To change buffer size (advanced):
OpenWire is not a standard Arduino built-in library. Instead, it is a protocol and a corresponding library designed for efficient, binary data transfer over serial interfaces (UART, I2C, or SPI). It is particularly popular in projects involving: You don't need to download it