Initial commit

button/button.pde

@@ -0,0 +1,41 @@
+// Code for the big red button
+//
+// When sending a signal to the button to tell it to be on or off,
+// the byte 'N' means oN and byte 'F' means ofF. On and off correspond
+// to HIGH and LOW on pin 13 which is the LED in the button.
+
+#define led 13
+#define button 2
+
+int led_state = LOW;
+
+void setup() {
+  pinMode(led, OUTPUT);
+  pinMode(button, INPUT);
+  digitalWrite(led, led_state);
+  Serial.begin(9600);
+}
+
+void loop() {
+
+  int button_state = digitalRead(button);
+
+  if (button_state == HIGH) {
+    delay(100);
+    Serial.print('P');
+  }
+
+  // if the speaker has sent a byte back
+  if (Serial.available()) {
+    byte state = Serial.read();
+    if (state == 'N') {
+      led_state = HIGH;
+    } else if (state == 'F') {
+      led_state = LOW;
+    }
+
+    // update the state of the LED
+    digitalWrite(13, led_state);
+  }
+}
+

speakers/speakers.pde

@@ -0,0 +1,41 @@
+// Code for the speaker controller
+
+// All the buttons do is send the byte 'P' to mean that the button has been pressed
+// This module decides how to respond to that P by either turning the relay on or off
+
+#define relay 2
+#define led 13
+
+int speaker_state = LOW;
+
+void setup() {
+  pinMode(relay, OUTPUT);
+  pinMode(led, OUTPUT);
+  digitalWrite(relay, speaker_state);
+  digitalWrite(led, speaker_state);
+  Serial.begin(9600);
+}
+
+void loop() {
+
+  if (Serial.available()) {
+
+    byte signal = Serial.read();
+
+    if (signal == 'P') {
+      if (speaker_state == LOW) {
+        speaker_state = HIGH;
+        Serial.print('N');
+      } else {
+        speaker_state = LOW;
+        Serial.print('F');
+      }
+    }
+
+    digitalWrite(relay, speaker_state);
+    digitalWrite(led, speaker_state);
+
+    delay(100);
+  }
+
+}