{"id":3705,"date":"2018-03-10T15:41:46","date_gmt":"2018-03-10T20:41:46","guid":{"rendered":"https:\/\/dronebotworkshop.com\/?p=3705"},"modified":"2023-04-12T12:59:13","modified_gmt":"2023-04-12T16:59:13","slug":"nrf24l01-wireless-joystick","status":"publish","type":"post","link":"https:\/\/dronebotworkshop.com\/nrf24l01-wireless-joystick\/","title":{"rendered":"Wireless Joystick for Arduino Robot Car with nRF24L01+"},"content":{"rendered":"\n

\"Download \"Parts<\/a> \"View<\/a> \"Download<\/a><\/p>\n

Introduction<\/span><\/h2>\n

Arduinos are great for many reasons, one of them being their ability to wire up to almost anything. \u00a0But there are times when you want to connect to your Arduino without using any wires, and when you do get the desire to go wireless there are several methods to choose from.<\/span><\/p>\n

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In this article (and in the corresponding video) I will examine one method of Arduino wireless communications, the nRF24L01+ module. \u00a0This is an inexpensive module that provides 2-way communications using the 2.4 GHz band. 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).<\/span><\/p>\n

The nRF24L01+ is available in a number of different configurations, in this article I\u2019ll look at a couple of the more popular ones. We\u2019ll hook them up and use a very extensive library to facilitate communications between them.<\/span><\/p>\n

\"Robot<\/p>\n

After we get them working we will use them to build something fun – a wireless joystick control for the Robot Car Base<\/a> that we worked on earlier.<\/span><\/p>\n

Before we begin let\u2019s examine the nRF24L01+ and some of the factore you need to take into account when designing wireless devices.<\/span><\/p>\n

Wireless Communications<\/span><\/h2>\n

We have been sending information wirelessly since the late 1880\u2019s, <\/span>Thomas Edison used a system of Electromagnetic Induction<\/span><\/a> to send telegraph signals from a moving train to a set of wires beside the track. Wireless devices are pretty well a part of our lives and most work using one of the following methods:<\/span><\/p>\n