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14. Wireless Communication > 14.1. Sending Messages Using Low-Cost Wireless Mod...
14.1. Sending Messages Using Low-Cost Wireless Modules
Problem
You want to transmit data between two Arduino boards using simple, low-cost wireless modules.
Solution
This recipe uses simple transmit and receive modules such as the SparkFun 315 MHz: WRL-10535 and WRL-10533, or the 434 MHz: WRL-10534 and WRL-10532.
Wire the transmitter as shown in Figure 14-1 and the receiver as in Figure 14-2. Some modules have the power line labeled VDD instead of Vcc.
The transmit sketch sends a simple text message to the receive sketch, which echoes the text to the Serial Monitor. The transmit and receive sketches use the VirtualWire library written by Mike McCauley to provide the interface to the wireless hardware. The library can be downloaded from http://www.open.com.au/mikem/arduino/VirtualWire-1.5.zip:
