Messages are sent with a training preamble, message length and checksum. Messages are sent with 4-to-6 bit encoding for good DC balance, and a CRC checksum for message integrity. Supports a number of inexpensive radio transmitters and receivers. VirtualWire is an Arduino library that provides features to send short messages, without addressing, retransmit or acknowledgment, a bit like UDP over wireless, using ASK (amplitude shift keying). this code for transmitter : //simple Tx on pin D12 //Written By : Mohannad Rawashdeh // 3:00pm, // //. after extract the folder, and move it to " Libraries " on the arduino Folder this is a simple code, it will send character '1' and after 2 sec will send character '0' and so on. This library allow You to send and receive data"byte" and string easily, First Download the library from Here. Supports a number of inexpensive radio transmitters and receivers. Fortunately, There is a popular Library for arduino Called "" VirtualWire"" Created by Mike McCauley VirtualWire is an Arduino library that provides features to send short messages, without addressing, retransmit or acknowledgment, a bit like UDP over wireless, using ASK (amplitude shift keying).
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