Created May 13, 2020

Check Sleep Position Device

Automatically detect body position when individual is sleeping or detect noise (snoring) and turn on vibration in order to accommodate body

IntermediateFull instructions provided4 hours14

Things used in this project

Hardware components

Wireless-Tag WT8266-S1 (ESP8266) Wifi Module

Inertial Measurement Unit (IMU) (6 deg of freedom)

Mini motor

Microphone Ky-037

Transistor BJT BC547C NPN

Resistor 34 ohms

Resistor 12 K ohms

Jumper wires (generic)

Software apps and online services

Arduino IDE

Story

Sleep problems as menopausal symptoms

Both snoring and obstructive sleep apnea could lead to earlier impairment of cardiac function in women.

“Snoring” refers to a sleeping pattern in which a person breathes while emitting a snorting or grunting sound.

Snoring might become more dangerous as people age, and it can also lead to heart disease.

There are different types of sleep apnea, but the most common is called Obstructive Sleep Apnea (OSA).

This condition affects breathing patterns while sleeping, causing a person to stop breathing and start again repeatedly. About half of people who snore loudly have OSA.

When OSA occurs, the muscles in the throat that are responsible for keeping the airway open actually prevent the flow of air.

A good position of the body when sleeping helps to have a good breath where the body rests and it is properly oxygenated. In order to help in this problem is to have an alert to accommodate or move the body for a correct air flow in our body.

Snoring or having a bad position to sleep is warned by the brain, but we do not always notice that brain signal. So we can help our body sensing a bad position of the body or detect the loud snoring through some device that move body to comfortable position or "hear" snoring.

To develop a device that can check the position of objects in space and detect sound, I looked for those sensors. I got a sensor that allows sensing 3-axis position, as well as a sound detector that was a microphone.

I selected a microcontroller ESP8266 MOD that allows to control those two devices, as well as their remote configuration. In this case I can generate a local Web Server to interchange data from any browser and setting devices.

To alert the sleeping individual, I was able to obtain a small motor to alert the individual who is turned on for a period of 3 seconds when the motion sensor detects body position more than 70 degrees from its bed. The microphone senses sounds with a high peak at 15% compared to the last recorded sound. The parameters to alert the inclination or the hearing percentage are configurable through the browser of a nearby device.

As part of this project, a motor was added as indicated above, this motor cannot be started due to the demand for electrical current from the devices, the microcontroller has a maximum output of 3.3 volts and a maximum current of 40 mA, so a new circuit had to be created and added to the microcontroller. The resistances were calculated and the used transistor behaved like an on/off switch called saturation mode. Motor Battery was added.

Code

Check Sleep Position

// Librery for MPU
#include "MPU9250.h"

// Libreries for ESP to enable WiFi
#include <ESP8266WiFi.h>

// Generating MPU9250 object with the MPU-9250 sensor on I2C bus 0 with address 0x68
// MPU9250 is wired to ESP8266 MOD as follow: 
// MPU SCL Pin to ESP8266 D1 Pin
// MPU SDA Pin to ESP8266 D2 Pin
MPU9250 IMU(Wire,0x68);
// Status flag for MPU (available or not)
int status;

// percentage audible when divice ON
float percentage = 20;

//inclination degrees when dive ON
int incdegrees = 70;


// chnging rads to degrees operation
float deg;



// Generating WiFi zone to handle WEB Server from any Browser
// WiFi Name
const char* ssid  = "INFINITUM9203_2.4";
// WiFi Access
const char* password = "4584870";

// Creating Web Server object on port number 80
WiFiServer server(80);



// Procedure for Motor/Vibrator turning pin On/OFF into ESP8266

void vibrationONOFF() {
// sets the digital pin 2 ON 
  digitalWrite(2, HIGH); 
// waits for a 3 seconds
  delay(3000);          
// sets the digital pin 2 OFF
  digitalWrite(2, LOW);  

}

// Devices Setup 
  
void setup() {
// enable local serial to display data
  Serial.begin(115200);

// set pin modes for ESP8266 device
// selecting pin number 2 for output mode, turn ON/OFF motor
  pinMode(2, OUTPUT);
// selecting pin A0 (analog input) for microphone sensor
  pinMode(A0, INPUT);

// start communication with MPU Sensor 
// checking wire status with ESP8266 
  status = IMU.begin();
  if (status < 0) {
    Serial.println("IMU initialization unsuccessful");
    Serial.println("Check IMU wiring or try cycling power");
    Serial.print("Status: ");
    Serial.println(status);
    while(1) {}
  }

// manufacturer recommendetions settings
// setting the gyroscope full scale range to +/-500 deg/s
  IMU.setGyroRange(MPU9250::GYRO_RANGE_500DPS);
// setting DLPF bandwidth to 20 Hz
  IMU.setDlpfBandwidth(MPU9250::DLPF_BANDWIDTH_20HZ);
// setting SRD to 19 for a 50 Hz update rate
  IMU.setSrd(19);  

// Setting WiFi
// Print ESP8266 Local IP Address (default settings for this proposal IP address is 192.168.1.91)

Serial.print("Connecting to ");
Serial.println(ssid);

WiFi.begin(ssid, password);

while (WiFi.status() !=WL_CONNECTED) {
  delay(500);
  Serial.print(".");
}
Serial.println(" ");
Serial.println("WiFi connected");

//Start web server
server.begin();
Serial.println("Server started");
Serial.print("http://");
Serial.println(WiFi.localIP());
Serial.println("/");
}



void loop() {

  // reading MPU sensor
  IMU.readSensor();

  // Changing rads to grades
  deg = abs((IMU.getGyroX_rads()) * 180);
  // changing celciuos to fahrenheit
  float cel = float(IMU.getTemperature_C());
  float far = (cel*9/5 + 32);
  
  //if inclination rise more than 70 degrees turn motor ON
 if (deg > incdegrees) {
    vibrationONOFF();
    delay(5000);
  }
  // Read Analog ESP8266 pin and check if percentage is more than 15%  
  float mp = analogRead(A0);
  delay(500);
  float temmp = analogRead(A0);
 
  float permp = mp * (percentage)*0.01;
  
  if ((mp + permp) < temmp) {
    vibrationONOFF();
    mp = 0.0;
    temmp = 0.0;
  }

//Setting Wifi Client

WiFiClient client = server.available();
if (!client) {
  return;
}

Serial.println("New client");
while (!client.available()){
  delay(1);
}

String request = client.readStringUntil('\r');
Serial.println(request);
client.flush();



//percentages audio settings
if (request.indexOf("/AUDIO=30") != -1) {
  percentage = 30;
  
}
if (request.indexOf("/AUDIO=20") != -1) {
  percentage = 20;
  
}
if (request.indexOf("/AUDIO=10") != -1) {
  percentage = 10;
  
}

//inclination degrees settings
if (request.indexOf("/INCLINATION=90") != -1) {
  incdegrees = 90;
  
}
if (request.indexOf("/INCLINATION=80") != -1) {
  incdegrees = 80;
  
}
if (request.indexOf("/INCLINATION=70") != -1) {
  incdegrees = 70;
  
}

// return response
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");


client.print("Set Alarm Audio Peack : ");
client.println("<br>");
client.println("<a href=\"/AUDIO=30\"\"><button>30 %</button></a>");
client.println("<a href=\"/AUDIO=20\"\"><button>20 % </button></a>");
client.println("<a href=\"/AUDIO=10\"\"><button>10 % </button></a><br/>");
//client.println("<br>");

if (percentage == 10) {
  client.print("Peack of 10 % ");
  client.println("<br>");
}
if (percentage == 20) {
  client.print("Peack 20 %");
  client.println("<br>");
} 
if (percentage == 30) {
  client.print("Peack 30 %");
  client.println("<br>");
}
client.println("<br>");
client.print("Set Alarm Inclination Degrees : ");
client.println("<br>");
client.println("<a href=\"/INCLINATION=90\"\"><button>90 deg</button></a>");
client.println("<a href=\"/INCLINATION=80\"\"><button>80 deg</button></a>");
client.println("<a href=\"/INCLINATION=70\"\"><button>70 deg</button></a><br/>");

if (incdegrees == 90) {
  client.print("90 inclination degrees");
  client.println("<br>");
}
if (incdegrees == 80) {
  client.print("80 inclination degrees");
  client.println("<br>");
} 
if (incdegrees == 70) {
  client.print("70 inclination degrees");
  client.println("<br>");
}

client.println("<br>");
client.println("Temperatures: ");
client.println("<br>");
client.print("Fahrenheit: ");
client.println(far);
client.println("<br>");
client.print("Celsius: ");
client.println(cel);
client.println("<br>");

client.println("</html>");

delay(1);
Serial.println("Client disconnected");
Serial.println("");

}

Credits

Elias Tinajero

1 project • 0 followers