IOT on Wheels Design Challenge - Fatigue Alert System (Blog #4)

Hi everyone,

For Blog #4 I am attaching the code for the steering wheel touch sensor. Like I mentioned this is for the Arduino and it will be made to run on the Nucleo (When I get the Nucleo working). I am also blogging about the other parts of my project I have been working on.

First the code:

#include <CapacitiveSensor.h>

CapacitiveSensor   cs_4_8 = CapacitiveSensor(4,8); // 2M resistor between pins 4 & 8, pin 8 is also the sensor pin with the wire to the steering wheel
void setup()                    
{
   cs_4_8.set_CS_AutocaL_Millis(0xFFFFFFFF);
   Serial.begin(9600);
   pinMode(7,OUTPUT);
   pinMode(9,OUTPUT);
}
void loop()                    
{
 long sensor1 =  cs_4_8.capacitiveSensor(50);
    Serial.println(sensor1);  
   if(sensor1 >= 300) // Sensor being touched - No alerts
   {
    digitalWrite(7,LOW);
   }
   else{ // Sensor not touched - Alert activated
    digitalWrite(7,HIGH); // LED lit and alarm activated until sensor touched
    tone(9,500);
    delay(100);
    tone(9,600);
    delay(100);
    tone(9,700);
    delay(100);
    tone(9,800);
    delay(100);
    tone(9,900);
    delay(100);
    tone(9,1000);
    delay(100);
    tone(9,900);
    delay(100);
    tone(9,800);
    delay(100);
    tone(9,700);
    delay(100);
    tone(9,600);
    delay(100);
    tone(9,500);
    delay(100);
    noTone(9);
   }  
}

The other sensors I am working on are as follows:

Tilt sensor: This suggestion is from DAB (Thank you for this!!). This sensor will be attached to a head band and will sense if your head tips forward due to nodding off. This is a serious indication that you must stop driving. Attached is the code.

int ledPin = 13;               
int switcher = 3;                 
void setup() {
  pinMode(ledPin, OUTPUT);      
  pinMode(switcher, INPUT);      
}
void loop() {
  if (digitalRead(switcher) == HIGH) 
    digitalWrite(ledPin, HIGH);   // Turn on LED and sound alert when the sensor is tilted
    tone(9,500);
    delay(100);
    tone(9,600);
    delay(100);
    tone(9,700);
    delay(100);
    tone(9,800);
    delay(100);
    tone(9,900);
    delay(100);
    tone(9,1000);
    delay(100);
    tone(9,900);
    delay(100);
    tone(9,800);
    delay(100);
    tone(9,700);
    delay(100);
    tone(9,600);
    delay(100);
    tone(9,500);
    delay(100);
    noTone(9);
  else
    digitalWrite(ledPin, LOW);    // Turn off LED and sound alert when the sensor is not triggered
}

Loud sound sensor:

This is to alert you if someone is honking their horn at you or any other loud noises. This could be from falling asleep at a traffic light and other outside warnings. This sensor will be placed in the trunk of the vehicle.

int soundPin = 10; 
int soundVal = HIGH; 
boolean bAlarm = false;
unsigned long lastDetectTime; 
int soundTime = 500; // Number of milli seconds to keep the sound alarm high
void setup ()
{
  Serial.begin(9600);  
  pinMode (soundPin, INPUT) ; // input from sensor
}
void loop ()
{
  soundVal = digitalRead (soundPin) ; // read the sound alarm time

  if (soundVal == LOW) // If we hear a sound
  {

    lastDetectTime = millis(); // record the time of the sound alarm
    if (!bAlarm){
    tone(9,500);
    delay(100);
    tone(9,600);
    delay(100);
    tone(9,700);
    delay(100);
    tone(9,800);
    delay(100);
    tone(9,900);
    delay(100);
    tone(9,1000);
    delay(100);
    tone(9,900);
    delay(100);
    tone(9,800);
    delay(100);
    tone(9,700);
    delay(100);
    tone(9,600);
    delay(100);
    tone(9,500);
    delay(100);
    noTone(9);
      bAlarm = true;
    }
  }
  else
  {
    if( (millis()-lastDetectTime) > soundTime  &&  bAlarm){
      bAlarm = false;
    }
  }
}

Next will be creating the vehicle vibration sensor and the vibrating wrist band alert. I am wanting to do the heart rate monitor but I don't think I will be receiving the sensor before the project is to be completed. Hope you enjoyed this update on my project.

Thank you

Dale W

Note: This system can be also used for distracted driving as well (Another very dangerous driving issue)