![]() ![]() ![]() They work a bit with ASK wireless, but not as well as this code. Messages are sent with 4-to-6 bit encoding for good DC balance, and a CRC checksum for message integrity.īut why not just use a UART connected directly to the transmitter/receiver? As discussed in the RFM documentation, ASK receivers require a burst of training pulses to synchronize the transmitter and receiver, and also requires good balance between 0s and 1s in the message stream in order to maintain the DC balance of the message. Messages are sent with a training preamble, message length and checksum. All that is required is transmit data, receive data and (for transmitters, optionally) a PTT transmitter enable.Ĭan also be used over various analog connections (not just a data radio), such as the audio channel of an A/V sender It is intended to be compatible with the RF Monolithics ( Virtual Wire protocol, but this has not been tested.ĭoes not use the Arduino UART. Supports a number of inexpensive radio transmitters and receivers. VirtualWire is a library for Arduino, Maple and others that provides features to send short messages, without addressing, retransmit or acknowledgment, a bit like UDP over wireless, using ASK (amplitude shift keying). To use the VirtualWire library, you must have:Īt the top of your sketch. Then launch the Arduino environment you should see the library in the Sketch->Import Library menu, and example code inįile->Sketchbook->Examples->VirtualWire menu. To install, unzip the library into the libraries sub-directory of your Arduino application directory. ![]() Nevertheless we recommend upgrading to RadioHead where This library will no longer be maintained or updated, but we will continue to publish RH_ASK driver message format and software technology is based on VirtualWire library, with which it is compatible.Īll the platforms that VirtualWire supported are also supported by RadioHead. RadioHead and its RH_ASK driver provides all the features supported by VirtualWire, and much moreīesides, including Reliable Datagrams, Addressing, Routing and Meshes. This VirtualWire library has now been superceded by the RadioHead library It provides a simple message passing protocol for a range of inexpensive transmitter and receiver modules. This is the VirtualWire "pure C" library for Arduino and other boards.
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