: Used for 1-Wire protocol devices, most commonly the DS18B20 temperature sensor. How to download : Use the Arduino Library Manager and search for " Paul Stoffregen VirtualWire Library ( VirtualWire.h
The header file openwireh (often misspelled from openwire.h ) contains all type definitions, function prototypes, and timing constants. to the Arduino community, this library is not part of the default IDE installation — hence the need for a manual download. openwireh library download arduino exclusive