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Radio waves are by no means a perfect method of communication, they are subject to interference from a number of sources and can be obstructed by metal or thick walls. Radio waves have a number of advantages over beams of infrared light, the most obvious is that radio waves can travel (to a degree) through walls and most other obstructions. Signals are sent on beams of infrared light.Wireless devices are pretty well a part of our lives and most work using one of the following methods: We have been sending information wirelessly since the late 1880’s, Thomas Edison used a system of Electromagnetic Induction to send telegraph signals from a moving train to a set of wires beside the track. We’ll hook them up and use a very extensive library to facilitate communications between them.Īfter we get them working we will use them to build something fun – a wireless joystick control for the Robot Car Base that we worked on earlier.īefore we begin let’s examine the nRF24L01+ and some of the factore you need to take into account when designing wireless devices. The nRF24L01+ is available in a number of different configurations, in this article I’ll look at a couple of the more popular ones.
#Usb joystick controller adafruit license#
This band is free to use for low power devices without a license and in some cases can be useful up to a kilometer (although you should expect much shorter ranges without a special antenna). This is an inexpensive module that provides 2-way communications using the 2.4 GHz band. In this article (and in the corresponding video) I will examine one method of Arduino wireless communications, the nRF24L01+ module.