It almost goes without saying that Mindstorms fans have figured out how to control their robots in ways not officially supported by LEGO. You can also create an interface for a custom robot, pulling out sliders and buttons from a library to match what you’re building.įIGURE 3.7 LEGO’s Bluetooth app allows you to control robots wirelessly.ĮV3’s Bluetooth capability also allows you to control the Intelligent Brick from your PC or Mac wirelessly, just as if you had it plugged in with a Bluetooth cable.įinally, one cool aspect of the robot, both in terms of Bluetooth and regular wiring, is you can link up to four EV3 bricks together if you want to build a gloriously complicated robot. The Intelligent Brick has a Bluetooth chip on-board, allowing it to connect to other EV3 bricks as well as take commands from smartphones using an application called the Commander, which includes preset control configurations for the five sample robots that are part of the EV3 set (see Figure 3.7). BluetoothĪnother intriguing option is the EV3 brick’s Bluetooth capabilities. The controller’s range is only about 2 meters, unfortunately. The beacon is what LEGO calls its remote control, and this is not just for fun: One of the projects described in the EV3 set is an IR-homing robot that wanders around until it senses the infrared signal from the beacon and rolls toward it. This feature has a short range compared to other proximity sensors (for example, ultrasonic), and can detect proximity only within 50cm to 70cm, or around 2 to 3 inches. The sensor has one added feature that most IR receivers lack: It can be used as a proximity sensor, beaming out infrared light and sensing as it bounces back. FIGURE 3.6 The infrared sensor and beacon give you simple wireless control of your robot.
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