add iot example

MQTT-IoTController/src/main.cpp

@@ -0,0 +1,51 @@
+#include <ESPMegaPRO.h>
+
+// Inputs
+const int DEBOUNCE_TIME_MS = 50;
+const int virtual_interrupt_pins[16] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
+int virtual_interupt_state[16];
+unsigned long virtual_interupt_timer[16];
+
+// Outputs
+const int pwm_pins[16] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
+int pwm_states[16];
+int pwm_values[16];
+
+// Forward declaration
+void virtual_interrupt_loop();
+void virtual_interrupt_callback(int pin, int state);
+
+void setup()
+{
+  ESPMega_begin();
+}
+
+void loop()
+{
+  ESPMega_loop();
+}
+
+void virtual_interrupt_callback(int pin, int state)
+{
+}
+
+void virtual_interrupt_loop()
+{
+  for (int i = 0; i < 16; i++)
+  {
+    int current_pin_value = ESPMega_digitalRead(virtual_interrupt_pins[i]);
+    if (virtual_interupt_state[i] != current_pin_value)
+    {
+      if (millis() - virtual_interupt_timer[i] > DEBOUNCE_TIME_MS)
+      {
+        virtual_interupt_state[i] = current_pin_value;
+        virtual_interrupt_callback(i, current_pin_value);
+      }
+    }
+    else
+    {
+      virtual_interupt_timer[i] = millis();
+    }
+    yield();
+  }
+}