Added an example to show multiple servos for the 4 channel ball dropper

examples/MultipleServos/MultipleServos.ino

+#include <Servo.h>
+
+#include <WallVis.h>
+
+WallVis node(
+  "new001",     // Our ID
+  "WallVisNet", //Wifi Access Point
+  "wallvisAP",  //WiFi Password
+  "192.168.4.1",//IP address of Node RED server
+  1883          //Port for Node RED server
+  );
+
+
+// Set up the servo we will use
+Servo s1 = Servo();
+Servo s2 = Servo();
+Servo s3 = Servo();
+Servo s4 = Servo();
+
+
+void setup()
+{
+  // Attach the servo to the right pin on the board
+  s1.attach(D1);
+  s2.attach(D2);
+  s3.attach(D3);
+  s4.attach(D4);
+
+  s1.write(0);
+  s2.write(0);
+  s3.write(0);
+  s4.write(0);
+
+  //Get the serial port ready
+  Serial.begin(115200);
+
+  //Add in a behaviour that just goes to a certain angle, with the default name 'goto'
+  node.add(new ServoGoto(s1,"goto1") );
+  node.add(new ServoGoto(s2,"goto2") );
+  node.add(new ServoGoto(s3,"goto3") );
+  node.add(new ServoGoto(s4,"goto4") );
+
+  //Add in a behaviour that rotates from 0 to 180 and back again (e.g. dropping a ball trustball style)
+  node.add(new RotateReturn(s1,"drop1",1,500, 3, 175) );
+  node.add(new RotateReturn(s2,"drop2",1,500, 3, 175) );
+  node.add(new RotateReturn(s3,"drop3",1,500, 3, 175) );
+  node.add(new RotateReturn(s4,"drop4",1,500, 3, 175) );
+ 
+  //Initialise the whole infrastructure
+  node.set_wifi(false);
+  node.init();
+}
+
+
+void loop()
+{
+  //Should be all we have to do
+  node.vis_loop();
+}