Now we will add a REST Server interface, allowing you to control any device via the LAN using HTTP.
This will allow us to use other programming languages such as HTML5 / JS to control the devices.
...
addInput(Connections.in.rest(8181));
Now your computer will become a server, allowing other computers on the local network send commands to the arduino / similar
| Tip |
|---|
You could use the "RaspberryPI" as Server |
Complete source
| Code Block |
|---|
import br.com.criativasoft.opendevice.core.SimpleDeviceManager;
import br.com.criativasoft.opendevice.core.connection.Connections;
import br.com.criativasoft.opendevice.core.model.Device;
import br.com.criativasoft.opendevice.core.model.DeviceListener;
import br.com.criativasoft.opendevice.core.model.DeviceType;
public class RestControlDemo extends SimpleDeviceManager implements DeviceListener {
public static void main(String[] args) throws Exception {
new RestControlDemo();
}
public RestControlDemo() throws Exception {
Device led = new Device(1, DeviceType.DIGITAL);
// setup connection with arduino/hardware
addOutput(Connections.out.usb()); // Connect to first USB port available
// Configure a Rest interface for receiving commands over HTTP
addInput(Connections.in.rest(8181));
addListener(this); // monitor changes on devices
connect();
addDevice(led);
}
// ------------- DeviceListener Impl --------------------------
// ------------------------------------------------------------
@Override
public void onDeviceChanged(Device device) {
System.out.println("DeviceChanged = " + device);
}
} |
Add Dependency:
| Code Block | ||||
|---|---|---|---|---|
| ||||
<dependency>
<groupId>br.com.criativasoft.opendevice</groupId>
<artifactId>opendevice-rest-ws-server</artifactId>
<version>${opendevice-version}</version>
</dependency> |
Run the class and and open your browser in:
...
addOutput(Connections.out.usb("/dev/ttyACM0"));
addOutput(Connections.out.usb("/dev/ttyACM1"));
addOutput(Connections.out.bluetooth("001303141907"));
addOutput(Connections.out.tcp("192.168.0.204:8081"));
Here's an example of how to use JQuery to control devices:
The REST connection has a simple http server for static pages, you can add the directories that will be available from this server.
| Info |
|---|
| The examples and code used in this tutorial can be found here: https://github.com/OpenDevice/OpenDevice/tree/master/examples/opendevice-tutorial |
See next step: Bluetooth Connection