1. /* This sketch demonstrates the following features:
1) Button Debouncing - used to eliminate random HIGH/
LOW signals during button press/release
2) Continuous BLE broadcasting until the RFduino exhibits a system reset
3) Implementation to switch between different states upon 'ACTION' press:
-> Begins at state '0' at start-up
-> State transition: 0-1-0 after single ACTION press
-> State transition: 0-2 after hold event
4) Single ACTION press -> sends sms to emergency contact with gps co-ordinates
-> activates continuous buzzer tone until hold event occurs
5) Hold ACTION event -> calls emergency contact
6) ON/OFF switch to turn off module -> single buzzer tone to signify power ON
*/
#include <RFduinoBLE.h>
#define ACTIONbutton 4 // GPIO4 used to track button press events
#define speaker 5 // GPIO5 used to activate speaker/buzzer
#define monitBatt 6 // GIPIO used to monitor battery level of the module
#define holdTime 1000 // how long to wait for press + hold event (hold period in
milliseconds)
#define debounce 1 // debounce period (in milliseconds) to prevent flickering when
pressing or releasing the ACTION button
int buttonVal = 0; // value read from ACTION button
int buttonLast = 0; // buffered value of the ACTION button's previous state
int ledState = -1; // Keeps track of the state of ACTION1
int stateEvent = 0; // Keeps track of the state of ACTION2
long btnDnTime=0; // time the button was pressed down
long btnUpTime=0; // time the button was released
boolean ignoreUp = false; // whether to ignore the button release due to click & hold
being triggered
float analogON_OFF; // analog voltage reading from "ON_OFF" output
float voltageON_OFF; // digital voltage reading from "ON_OFF" output
// Code below is run only once
void setup() {
Serial.begin(9600);
RFduinoBLE.deviceName = "Victor's RFduino"; // Set the BLE device name
RFduinoBLE.customUUID = "5eaca154-b39c-4235-af14-dc4db932d10c"; // Create
a unique and custom UUID
RFduinoBLE.advertisementInterval = 100;
RFduinoBLE.begin(); // Start BLE broadcasting
RFduinoBLE.txPowerLevel = -20; // Set the BLE transmit power to -20 dBm

2. (Decibels per milliwatts)
pinMode(ACTIONbutton,INPUT); // Set the ACTION button as an input
(GPIO4)
pinMode(speaker,OUTPUT); // Set the speaker output (GPIO5)
startUp();
}
// Code below runs forever
void loop()
{
analogON_OFF = analogRead(monitBatt);
voltageON_OFF = 3.5*analogON_OFF/1023;
// For arduino testing purposes ONLY
if (voltageON_OFF <= 3.25){
Serial.print("Low Battery Warning: Please recharge the battery!");
else if (voltageON_OFF > 3.25){
Serial.print("/nBattery is healthy!");
}
// At low battery, there will be two quick beeps and a long delay
// Bluetooth will also be turned off
while (voltageON_OFF < 3.25){
RFduinoBLE.end();
lowBattWarn();
delay(500);
}
buttonVal = digitalRead(ACTIONbutton);
// Test for button pressed and store the down time
if (buttonVal == HIGH && buttonLast == LOW && (millis() - btnUpTime) >
long(debounce)){
btnDnTime = millis(); // Store the down time
}
// Test for button release and store the up time
if (buttonVal == LOW && buttonLast == HIGH && (millis() - btnDnTime) >
long(debounce)){
if (ignoreUp == false){ // "FALSE" only if the ACTION button is tapped once
stateEvent = 1;
if (stateEvent == 1){
stateEvent1();
}

3. delay(150);
if (stateEvent == 0){
stateEvent0();
}
}
else{
ignoreUp == false;
}
btnUpTime = millis(); // Store the up time
}
// Test for button held down for longer than the hold time
if (buttonVal == HIGH && (millis() - btnDnTime) > long(holdTime)){
stateEvent = 2;
while (stateEvent == 2){
stateEvent2();
}
ignoreUp = true; // "TRUE" only if the ACTION button is held
btnDnTime = millis(); // Store down time
}
buttonLast = buttonVal;
}
// After initiating bluetooth connection, send an INT value of 0 through BLE
void RFduinoBLE_onConnect(){
Serial.println("Bluetooth has been connected!");
RFduinoBLE.sendByte(0);
}
// Tell the user when the device loses bluetooth connection
void RFduinoBLE_onDisconnect(){
Serial.println("Bluetooth has been disconnected!");
}
// 'Home' state event
void stateEvent0(){
RFduinoBLE.sendByte(0);
}
// First ACTION state event
void stateEvent1(){

4. RFduinoBLE.sendByte(1);
tone(5,60); // Generate a tone after first ACTION event
delay(100); // Delay used for repeating beeps
stateEvent = 0;
}
// Second ACTION state event
void stateEvent2(){
noTone(5); // Turn off tone after second ACTION event
RFduinoBLE.sendByte(2);
}
// Two quick beeps at POWER ON
void startUp(){
for (int i=0; i <= 2; i++){
digitalWrite(speaker,HIGH);
delay(100);
digitalWrite(speaker,LOW);
}
}
// Two quick beeps then a long delay at low battery
void lowBattWarn(){
for (int j=0; j<=2; j++){
digitalWrite(speaker,HIGH);
delay(100);
digitalWrite(speaker,LOW);
}
}