I have developed a project with Arduino Uno r3 dip version that has lot of sensors and also controls two 12v motors with L298N. everything was working fine when tested with individual program. But i got improper analog readings from joystick when every sensors and their program were put together. due to wrong analog reading the l298n does not enable the motors. I tried to troubleshoot it by separating the motor controlling program from other sensor programs and uploaded it to Arduino . It worked Fine . But every program put together l298n doesn't work . every other sensors work fine.
Please some one help me debug.
Thanks in advance..
sensors used :
ADXL335 ,pulse Sensor , Ultrasonic sensor, oled 128x32 display, gsm sim900a , L298N, DHT11 sensor, joystick.
#include <DHT.h>
#include <SoftwareSerial.h> //GSM
#include <Wire.h> //OLED
#include <Adafruit_SSD1306.h> //OLED
#define USE_ARDUINO_INTERRUPTS true
#include <PulseSensorPlayground.h>
//GSM
SoftwareSerial SIM900A(4,3); //GSM PIN 4 & 3
//OLED
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 32
#define OLED_RESET -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
//DHT11
#define DHTPIN 13 //DHT11 PIN 13
#define DHTTYPE DHT11
DHT dht(DHTPIN,DHTTYPE);
//ADXL
#define ADC_ref 5
#define zero_x 1.799
#define zero_y 1.799
#define zero_z 1.799
#define sensitivity_x 0.4
#define sensitivity_y 0.4
#define sensitivity_z 0.4
unsigned int value_x;
unsigned int value_y;
unsigned int value_z;
float xv;
float yv;
float zv;
float angle;
//MOTOR L298N
#define enA 9
#define in1 5
#define in2 6
#define enB 10
#define in3 7
#define in4 8
int motorSpeedA = 0;
int motorSpeedB = 0;
//PULSE SENSOR
PulseSensorPlayground pulseSensor;
const int PulseWire = A3; // PulseSensor ANALOG PIN 3
const int Threshold = 550;
int myBPM = 0;
char error="";
//ULTRASONIC SENSOR
const int trigPin = 12; //TRIG PIN 12
const int echoPin = 11; //ECHO PIN 11
long duration;
int distance;
int safetyDistance;
//BUZZER
const int buzz = 1; //BUZZER PIN 1
const int alertLED = 0; //RED LED 0
//SNOOZE
const int buttonPin = 2; //SNOOZE BUTTON pin 2
unsigned long startMillis; //TIME MILLIS
unsigned long currentMillis;
const unsigned long period = 10000;
bool snooze = false;
//SMS SENDING
int smsperiod = 40; //TIME 40 SEC
int smsMillis = 0; //INCREAMENT TIME
void setup() {
Serial.begin(9600);
//BEGIN OLED
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
display.setTextColor(WHITE);
//BEGIN GSM
SIM900A.begin(9600);
//BEGIN DHT
dht.begin();
//ADXL
analogReference(ADC_ref);
//ULTRASONIC SENSOR PIN MODE
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
//BUZZER, LED & SNOOZE PIN MODE
pinMode(buzz, OUTPUT);
pinMode(alertLED, OUTPUT);
pinMode(buttonPin, INPUT_PULLUP);
//L298N PIN MODE
pinMode(enA, OUTPUT);
pinMode(enB, OUTPUT);
pinMode(in1, OUTPUT);
pinMode(in2, OUTPUT);
pinMode(in3, OUTPUT);
pinMode(in4, OUTPUT);
//PULSE SENSOR CONFIG
pulseSensor.analogInput(PulseWire);
pulseSensor.setThreshold(Threshold);
if(!pulseSensor.begin()){
}
//WELCOME MESSAGE
display.clearDisplay();
display.setCursor(40,5);
display.setTextSize(3);
display.println("SWC");
delay(3000);
display.display();
display.clearDisplay();
display.setCursor(20,5);
display.setTextSize(2);
display.println("WELCOME!!");
delay(2000);
display.display();
}
void loop() {
//CALL JOYSTICK
motorControll();
//CALL ULTRASONIC & ADXL
readDistandAngle();
delay(700);
//CALL DHT AND PULSE DISPLAY
readDhtPulse();
delay(20);
}
void readDhtPulse(){
//READ DHT VALUES
float h = dht.readHumidity();
float t = dht.readTemperature();
//READ PULSE VALUE
int mypulse = pulseSensor.getBeatsPerMinute();
if(mypulse>205 && mypulse<550){
myBPM = 98;
}
else if(mypulse>155 && mypulse<550){
myBPM = 94;
}
else if(mypulse>103 && mypulse<550){
myBPM = 86;
}
else if(mypulse>80&&mypulse<103){
myBPM = mypulse;
}
else {
myBPM = 83;
}
//OLED DISPLAY TEMP, HUMID & PULSE
display.clearDisplay();
// display temperature
display.setTextSize(1);
display.setCursor(0,4);
display.print("T: ");
display.setTextSize(2);
display.setCursor(17,0);
display.print(t);
display.setTextSize(1);
display.setCursor(77, 6);
display.print(" C");
// display humidity
display.setTextSize(1);
display.setCursor(0, 19);
display.print("H: ");
display.setTextSize(2);
display.setCursor(17, 16);
display.print(h);
display.setTextSize(1);
display.setCursor(77, 21);
display.print(" %");
// display pulse
display.setTextSize(1);
display.setCursor(95, 2);
display.print("Pulse");
display.setCursor(95, 13);
if (pulseSensor.sawStartOfBeat()) {
display.print(myBPM);
}
else {
display.print(myBPM);
}
display.setCursor(95, 24);
display.print("BPM");
display.display();
}
void motorControll() {
int xAxis = analogRead(A4); // Read Joysticks X-axis
int yAxis = analogRead(A5); // Read Joysticks Y-axis
// x-axis used for forward and backward control
if (xAxis < 470) {
// Set Motor A backward
digitalWrite(in1, LOW);
digitalWrite(in2, HIGH);
// Set Motor B backward
digitalWrite(in3, LOW);
digitalWrite(in4, HIGH);
// Convert the declining x-axis readings for going backward from 470 to 0 into 0 to 255 value for the PWM signal for increasing the motor speed
motorSpeedA = map(xAxis, 470, 0, 0, 255);
motorSpeedB = map(xAxis, 470, 0, 0, 255);
}
else if (xAxis > 550) {
// Set Motor A forward
digitalWrite(in1, HIGH);
digitalWrite(in2, LOW);
// Set Motor B forward
digitalWrite(in3, HIGH);
digitalWrite(in4, LOW);
// Convert the increasing Y-axis readings for going forward from 550 to 1023 into 0 to 255 value for the PWM signal for increasing the motor speed
motorSpeedA = map(xAxis, 550, 1023, 0, 255);
motorSpeedB = map(xAxis, 550, 1023, 0, 255);
}
// If joystick stays in middle the motors are not moving
else {
motorSpeedA = 0;
motorSpeedB = 0;
}
// y-axis used for left and right control
if (yAxis < 470) {
// Convert the declining y-axis readings from 470 to 0 into increasing 0 to 255 value
int xMapped = map(yAxis, 470, 0, 0, 255);
// Move to left - decrease left motor speed, increase right motor speed
motorSpeedA = motorSpeedA - xMapped;
motorSpeedB = motorSpeedB + xMapped;
}
if (yAxis > 550) {
// Convert the increasing y-axis readings from 550 to 1023 into 0 to 255 value
int yMapped = map(yAxis, 550, 1023, 0, 255);
// Move right - decrease right motor speed, increase left motor speed
motorSpeedA = motorSpeedA + yMapped;
motorSpeedB = motorSpeedB - yMapped;
}
// Prevent buzzing at low speeds (Adjust according to your motors. My motors couldn't start moving if PWM value was below value of 70)
if (motorSpeedA < 70) {
motorSpeedA = 0;
}
if (motorSpeedB < 70) {
motorSpeedB = 0;
}
// Confine the range from 0 to 255
if (motorSpeedA < 0) {
motorSpeedA = 0;
}
if (motorSpeedB > 255) {
motorSpeedB = 255;
}
analogWrite(enA, motorSpeedA); // Send PWM signal to motor A
analogWrite(enB, motorSpeedB); // Send PWM signal to motor B
}
void readDistandAngle() {
currentMillis = millis();
//CHECK FOR SNOOZE
if (currentMillis - startMillis >= period) {
snooze=false;
}
//CHECK FOR ALERT
if(checkAngle()||checkDist()){ //CALL ANGLE & DIST FUNCTION
checkForSnooze(); //CALL SNOOZE FUNCTION
if(snooze==false){
digitalWrite(alertLED, HIGH);
digitalWrite(buzz, HIGH);
}
}
else{
digitalWrite(buzz, LOW);
digitalWrite(alertLED, LOW);
}
}
//ANGLE FUNCTION
bool checkAngle(){
//CALCULATE ANGLE
value_x = analogRead(A0);
value_y = analogRead(A1);
value_z = analogRead(A2);
xv=(value_x/1024.0*ADC_ref-zero_x)/sensitivity_x;
yv=(value_y/1024.0*ADC_ref-zero_y)/sensitivity_y;
zv=(value_z/1024.0*ADC_ref-zero_z)/sensitivity_z;
angle =atan2(-yv,-zv)*57.2957795+180;
Serial.print("angle : ");
Serial.println(angle);
//CHECK ANGLE
if (angle >=220 || angle<= 168){
if(snooze==false){
//CHECK ALERT TIME FOR SMS
checkForAlertSms();
}
return true;
}
else {
smsMillis = 0;
return false;
}
}
//SMS FUNCTION
void checkForAlertSms(){
if (smsMillis++ > smsperiod ){
SIM900A.println("AT+CMGF=1");
delay(1000);
SIM900A.println("AT+CMGS=\"+918946014837\"\r");
delay(1000);
SIM900A.println("Accident ALERT!! Please Check on SWC USER Location : https://www.google.com/maps/place/9%C2%B042'28.9%22N+78%C2%B005'42.5%22E");
delay(1000);
SIM900A.println((char)26);
delay(1000);
smsMillis = 0;
}
}
//DISTANCE FUNCTION
bool checkDist(){
//CALCULATE DISTANCE
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance= (duration/2) * 0.0343;
safetyDistance = distance;
//CHECK DISTANCE
if (safetyDistance <= 30){
return true;
}
else {
return false;
}
}
//SNOOZE FUNCTION
void checkForSnooze(){
if (digitalRead(buttonPin) == LOW ) {
digitalWrite(buzz, LOW);
digitalWrite(alertLED, LOW);
snooze = true;
startMillis = millis();
}
}
test_swc.ino (9.0 KB)
and uses DEFAULT (Vcc. 5V on a 5V system).