Smart Watch Versions

red black grey oreng (orenge = +vcc black gnd) Aruncs31s@twilio
9V7MKPF5XPFUNELZP252J63L

Requirements

Should contain a sos button
Should detect "HELP" command
Should Send location to the parents
Should measure the heart rate

Working

The working prototype will send messages (current location) to specified number (parents,police and any another if any).

The system also detects "HELP" command , ie. if someone says "HELP" from near the prototype the the system will triger the SOS message
Structure of SOS Message

https://www.google.com/maps?q=Lon,Lat

BILL Of Material

VC-02 Ai Thinker Intelligent Offline Speech Recognition Module Purchase Link Datasheet
Neo6M GPS Module Purchase Link DataSheet Tutorial [[#Neo 6m GPS]]
SIM800L GPRS GSM Module Core Board Quad-band TTL Serial Port with the antenna Purchase Link

Component	Cost
ESP8266	320
GPS Module	439.00
Help recognittion Module	1,099
GSM Module	410
USB Charge converter	10
Battery & other	200
Total

PINS

D5	Tx of GPS
D4	Rx of GPS

Version 1

Multi-column

Blank

SIM800L Interfacing

#define BAUD_RATE 9600
#define MIC_PIN A0

#if defined(ARDUINO)
#define GSM_TX 3
#define GSM_RX 2
#elif defined(ESP8266)
#define GSM_TX D5
#define GSM_RX D6
#endif
/* --- Config.h --- */
/* Source: https://lastminuteengineers.com/sim800l-gsm-module-arduino-tutorial/
 */

#include "Config.h"
#include <Arduino.h>
#include <SoftwareSerial.h>

// #if defined(ARDUINO)
SoftwareSerial gsmSerial(GSM_TX, GSM_RX); // 3 -> SIM800L Tx & 2 -> SIM800L Rx
// #elif defined(ESP8266)
// SoftwareSerial gsmSerial(D5, D6); // D5 -> SIM800L Tx & D6 -> SIM800L Rx
// #endif

void updateSerial() {
  delay(500);
  while (Serial.available()) {
    gsmSerial.write(
        Serial.read()); // Forward what Serial received to Software Serial Port
  }
  while (gsmSerial.available()) {
    Serial.write(
        gsmSerial
            .read()); // Forward what Software Serial received to Serial Port
  }
}
void setup() {
  Serial.begin(9600);

  // Start GSM Serial
  gsmSerial.begin(9600);

  Serial.println("Initializing...");
  delay(1000);

  gsmSerial.println(
      "AT"); // Once the handshake test is successful, it will back to OK
  updateSerial();

  gsmSerial.println("AT+CMGF=1"); // Configuring TEXT mode
  updateSerial();
  gsmSerial.println(
      "AT+CMGS=\"+917902504188\""); // change ZZ with country code and
                                    // xxxxxxxxxxx with phone number to sms
  updateSerial();
  gsmSerial.print(
      "Last Minute Engineers | lastminuteengineers.com"); // text content
  updateSerial();
  gsmSerial.write(26);
}

void loop() {
  updateSerial();
  delay(1000);
}

Neo 6m GPS

/*
 * Source:
 * https://randomnerdtutorials.com/esp8266-nodemcu-neo-6m-gps-module-arduino/
 */
#define BAUD_RATE 9600
#define MIC_PIN A0
#define GPS_BAUD_RATE 9600

#if defined(ARDUINO)
#define GSM_TX 3
#define GSM_RX 2
#elif defined(ESP8266)
#define GSM_TX D5 // This should connect to the TX pin of the GPS module
#define GSM_RX D6 // This should connect to the RX pin of the GPS module
#endif
/* --- Config.h ---*/
#include "Config.h"
#include <SoftwareSerial.h>
#include <TinyGPS++.h>

TinyGPSPlus gps;

// Create an instance of Software Serial
SoftwareSerial gpsSerial(GPS_RX, GPS_TX);

void setup() {
  // Serial Monitor
  Serial.begin(115200);

  // Start Serial 2 with the defined RX and TX pins and a baud rate of 9600
  gpsSerial.begin(GPS_BAUD_RATE);
  Serial.println("Software Serial started at 9600 baud rate");
}

void loop() {
  // This sketch displays information every time a new sentence is correctly
  // encoded.
  unsigned long start = millis();

  while (millis() - start < 1000) {
    while (gpsSerial.available() > 0) {
      gps.encode(gpsSerial.read());
    }
    if (gps.location.isUpdated()) {
      Serial.print("LAT: ");
      Serial.println(gps.location.lat(), 6);
      Serial.print("LONG: ");
      Serial.println(gps.location.lng(), 6);
      Serial.print("SPEED (km/h) = ");
      Serial.println(gps.speed.kmph());
      Serial.print("ALT (min)= ");
      Serial.println(gps.altitude.meters());
      Serial.print("HDOP = ");
      Serial.println(gps.hdop.value() / 100.0);
      Serial.print("Satellites = ");
      Serial.println(gps.satellites.value());
      Serial.print("Time in UTC: ");
      Serial.println(String(gps.date.year()) + "/" + String(gps.date.month()) +
                     "/" + String(gps.date.day()) + "," +
                     String(gps.time.hour()) + ":" + String(gps.time.minute()) +
                     ":" + String(gps.time.second()));
      Serial.println("");
    }
  }
}

      Serial.print("LAT: ");
      Serial.println(gps.location.lat(), 6);
      Serial.print("LONG: ");
      Serial.println(gps.location.lng(), 6);

#include <SoftwareSerial.h>
#include <TinyGPS++.h>
#define GPS_TX D6 // Connects to TX pin of GPS module
#define GPS_RX D7 // Connects to RX pin of GPS module
TinyGPSPlus gps;
SoftwareSerial gpsSerial(GPS_RX, GPS_TX);
void setup() {
	Serial.begin(9600);
	gpsSerial.begin(9600);
}
void loop() {
	unsigned long start = millis();
	while (millis() - start < 1000) {
		while (gpsSerial.available() > 0) {
			gps.encode(gpsSerial.read());
	}
	if (gps.location.isUpdated()) {
		Serial.print("LAT: ");
		Serial.println(gps.location.lat(), 6);
		Serial.print("LONG: ");
		Serial.println(gps.location.lng(), 6);
		Serial.print("SPEED (km/h): ");
		Serial.println(gps.speed.kmph());
		Serial.print("ALT (m): ");
		Serial.println(gps.altitude.meters());
		Serial.print("HDOP: ");
		Serial.println(gps.hdop.value() / 10.0);
		Serial.print("Satellites: ");
		Serial.println(gps.satellites.value());
	char buffer[30];
	sprintf(buffer, "%04d/%02d/%02d, %02d:%02d:%02d", gps.date.year(), gps.date.month(),gps.date.day(), gps.time.hour(), gps.time.minute(), gps.time.second());
	Serial.print("Time in UTC: ");
	Serial.println(buffer);
	Serial.println();
	}
  }
}

Speech Processing

Going to use raspberry pi for now

nmap  10.42.0.1-255

ip address of pi 10.42.0.122
username multimediaextension <-- Shrink
passwd 2xsp <-- expand

MIC Interfacing

number of points/samples = 4581

starting of help

\begin{matrix} (1) & (4581 / 3) \times 1.86 = 2840.22 \end{matrix}

let this be $s_{s t a r t}$

Ending of help

\begin{matrix} (2) & (\frac{4581}{3}) \times 1.96 = 2992.92 \end{matrix}

let this be $S_{s t o p}$

help took $S_{s t o p} - S_{s t a r t} = 152$ samples

Picovoice Rhino Speech-to-Intent

Pyaudio Setup

# Debian
sudo apt-get install libasound-dev
# Fedora
sudo dnf install portaudio-devel

D1 Button Test

#include <Arduino.h>
void setup() {
  pinMode(D1, INPUT);
  Serial.begin(9600);
}
void loop() {
  Serial.println(digitalRead(D1));
  delay(500);
}

#include <Arduino.h>
void IRAM_ATTR theISR(){
	Serial.println("Button Pressed");
}
void setup(){
	Serial.begin(9600);
	attachInterrupt(D1,theISR,FALLING);
}
void loop(){
	delay(1000);
}

Help Test

#include <Arduino.h>
void IRAM_ATTR theISR(){
	Serial.println("Button Pressed");
}
void setup(){
	Serial.begin(9600);
	attachInterrupt(D8,theISR,RISING);
}
void loop(){
	delay(1000);
}

Sajesh Kumar Sir Suggestions

Version 2

Version 2 changes the design and includes a new lcd screen ,
Componnets

Pins Used	Purpose
D8	help Interrupt
D7	Rx GSM
D6	Tx GSM
D1 , D2	I2C Lcd

#include "ESP8266WiFi.h"
#include "NTPClient.h"
#include "WiFiUdp.h"
#include <Arduino.h>
#include <Config.hpp>
#include <LiquidCrystal_I2C.h>

// +5:30 hours for india
const long utcOffsetInSeconds = 19800;

char daysOfTheWeek[7][12] = {"Sunday",   "Monday", "Tuesday", "Wednesday",
                             "Thursday", "Friday", "Saturday"};

// Define NTP Client to get time
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds);

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  Serial.begin(115200);
  WiFi.begin(SSID, PASSWORD);
  timeClient.begin();

  lcd.init();
  lcd.clear();
  lcd.backlight(); 

  lcd.setCursor(0, 0); 
  lcd.print("Setting UP!");
  lcd.setCursor(0, 1); 
  lcd.print("Please Wait...");
  while (WiFi.status() != WL_CONNECTED) {

    delay(500);
    Serial.print(".");
  }

  lcd.clear();
}

void loop() {

  timeClient.update();
  lcd.setCursor(0, 0); // Set cursor to character 0 on line 0
  lcd.print("Smart Watch");

  lcd.setCursor(0, 1); // Move cursor to character 0 on line 1

  lcd.print(daysOfTheWeek[timeClient.getDay()]);
  lcd.print(" ");
  lcd.print(timeClient.getHours());
  lcd.print(":");
  lcd.print(timeClient.getMinutes());
  lcd.print(":");
  lcd.print(timeClient.getSeconds());
  Serial.println(timeClient.getFormattedTime());
  delay(1000);
  lcd.clear();
}

12-02-25

Find Neo 6m connected pins

#include <Arduino.h>
#define USE_ARDUINO_INTERRUPTS true    // Set-up low-level interrupts for most acurate BPM math
#include <PulseSensorPlayground.h>     // Includes the PulseSensorPlayground Library

const int PulseWire = A0;       // 'S' Signal pin connected to A0
const int LED13 = 13;          // The on-board Arduino LED
int Threshold = 550;           // Determine which Signal to "count as a beat" and which to ignore
                               
PulseSensorPlayground pulseSensor;  // Creates an object

void setup() {
    Serial.begin(9600);

    // Configure the PulseSensor object, by assigning our variables to it
    pulseSensor.analogInput(PulseWire);   
    pulseSensor.blinkOnPulse(LED13);       // Blink on-board LED with heartbeat
    pulseSensor.setThreshold(Threshold);   

    // Double-check the "pulseSensor" object was created and began seeing a signal
    if (pulseSensor.begin()) {
        Serial.println("PulseSensor object created!");
    }
}

void loop() {
    int myBPM = pulseSensor.getBeatsPerMinute();      // Calculates BPM

    if (pulseSensor.sawStartOfBeat()) {               // Constantly test to see if a beat happened
        Serial.println("♥  A HeartBeat Happened ! "); // If true, print a message
        Serial.print("BPM: ");
        Serial.println(myBPM);                        // Print the BPM value
        }

    delay(20);
}

  

#define GSM_TX D3

#define GSM_RX D4

/* -- Config.h --- */

  

#include <Arduino.h>

#include <SoftwareSerial.h>

  

SoftwareSerial gsmSerial(GSM_TX, GSM_RX); // 3 -> SIM800L Tx & 2 -> SIM800L Rx

  

void updateSerial() {

delay(500);

while (Serial.available()) {

gsmSerial.write(

Serial.read()); // Forward what Serial received to Software Serial Port

}

while (gsmSerial.available()) {

Serial.write(

gsmSerial

.read()); // Forward what Software Serial received to Serial Port

}

}

void setup() {

Serial.begin(9600);

  

// Start GSM Serial

gsmSerial.begin(9600);

  

Serial.println("Initializing...");

delay(1000);

  

gsmSerial.println(

"AT"); // Once the handshake test is successful, it will back to OK

updateSerial();

  

gsmSerial.println("AT+CMGF=1"); // Configuring TEXT mode

updateSerial();

gsmSerial.println(

"AT+CMGS=\"+919744314562\""); // change ZZ with country code and

// xxxxxxxxxxx with phone number to sms

updateSerial();

gsmSerial.print(

"Come to room"); // text content

updateSerial();

gsmSerial.write(26);

}

  

void loop() {

updateSerial();

delay(1000);

}