Arduino Sensors
Here you will find a brief introduction and simple usage guide/instructions along with simple Sketch for arduino based sensors & addons like displays, motors, modules, etc.
 This page is under construction.
|
TM1637
- Connecting TM1637 4x7 Segment Display to Arduino
Source: tronixstuff.com
#include <Arduino.h>
#include <TM1637Display.h>
#define CLK 2
#define DIO 3
#define TEST_DELAY 2000
const uint8_t SEG_DONE[] = {
SEG_B | SEG_C | SEG_D | SEG_E | SEG_G, // d
SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F, // O
SEG_C | SEG_E | SEG_G, // n
SEG_A | SEG_D | SEG_E | SEG_F | SEG_G // E
};
TM1637Display display(CLK, DIO);
void setup()
{
}
void loop()
{
int k;
uint8_t data[] = { 0xff, 0xff, 0xff, 0xff };
display.setBrightness(0x0f);
// All segments on
display.setSegments(data);
delay(TEST_DELAY);
// Selectively set different digits
data[0] = 0b01001001;
data[1] = display.encodeDigit(1);
data[2] = display.encodeDigit(2);
data[3] = display.encodeDigit(3);
for(k = 3; k >= 0; k--) {
display.setSegments(data, 1, k);
delay(TEST_DELAY);
}
display.setSegments(data+2, 2, 2);
delay(TEST_DELAY);
display.setSegments(data+2, 2, 1);
delay(TEST_DELAY);
display.setSegments(data+1, 3, 1);
delay(TEST_DELAY);
// Show decimal numbers with/without leading zeros
bool lz = false;
for (uint8_t z = 0; z < 2; z++) {
for(k = 0; k < 10000; k += k*4 + 7) {
display.showNumberDec(k, lz);
delay(TEST_DELAY);
}
lz = true;
}
// Show decimal number whose length is smaller than 4
for(k = 0; k < 4; k++)
data[k] = 0;
display.setSegments(data);
display.showNumberDec(153, false, 3, 1);
delay(TEST_DELAY);
display.showNumberDec(22, false, 2, 2);
delay(TEST_DELAY);
display.showNumberDec(0, true, 1, 3);
delay(TEST_DELAY);
display.showNumberDec(0, true, 1, 2);
delay(TEST_DELAY);
display.showNumberDec(0, true, 1, 1);
delay(TEST_DELAY);
display.showNumberDec(0, true, 1, 0);
delay(TEST_DELAY);
// Brightness Test
for(k = 0; k < 4; k++)
data[k] = 0xff;
for(k = 0; k < 16; k++) {
display.setBrightness(k);
display.setSegments(data);
delay(TEST_DELAY);
}
// Done!
display.setSegments(SEG_DONE);
while(1);
}
DS3231
- Setting Time for first usage
- You can uncomment the below 3 lines from the below give sketch code to set time for first time.
- Set a near future time & either start uploading the code 2-3 seconds before the exact time(which was set).
- Otherwise upload time code before the time & press the reset button on Arduino at the exact time.
- After time is synced, comment these lines & reupload the code again o Arduino.
- Otherwise same time will be set on every powerup or reset of arduino
//rtc.setDOW(WEDNESDAY); // Set Day-of-Week to SUNDAY //rtc.setTime(12, 0, 0); // Set the time to 12:00:00 (24hr format) //rtc.setDate(1, 1, 2014); // Set the date to January 1st, 2014
- DS3231 RTC Clock Using Non-Rechargeable Batteries
Source: raspberrypi-spy.co.uk, woodsgood.ca
- DS3231 RTC Clock with TM1637 Display
Source: instructables.com
#include <TM1637Display.h>
#include <TM1637.h>
// Arduino Uno/2009:
// ----------------------
// DS3231: SDA pin -> Arduino Analog 4 or the dedicated SDA pin
// SCL pin -> Arduino Analog 5 or the dedicated SCL pin
#include <Wire.h>
#include <DS3231.h>
#include <config.h>
#define DISPLAY_CLK_PIN 2
#define DISPLAY_DIO_PIN 3
int led = 3;
TM1637 display(DISPLAY_CLK_PIN, DISPLAY_DIO_PIN);
DS3231 rtc(SDA, SCL);
Time t;
void setup()
{
Serial.begin(115200);
display.set();
display.init();
pinMode(led, OUTPUT);
rtc.begin();
// The following lines can be uncommented to set the date and time
//rtc.setDOW(WEDNESDAY); // Set Day-of-Week to SUNDAY
//rtc.setTime(12, 0, 0); // Set the time to 12:00:00 (24hr format)
//rtc.setDate(1, 1, 2014); // Set the date to January 1st, 2014
}
void loop()
{
int8_t timeDisp[4];
t = rtc.getTime();
timeDisp[0] = t.hour / 10;
timeDisp[1] = t.hour % 10;
timeDisp[2] = t.min / 10;
timeDisp[3] = t.min % 10;
display.point(t.sec % 2 ? POINT_ON : POINT_OFF); //Colon Blibk
display.display(timeDisp);
delay (1000);
}
- Library
Source: rinkydinkelectronics.com
HC-SR04
- HC-SR04 UltraSonic Distance Sensor with TM1637 Display
Source: codebender.cc
#include <Arduino.h>
#include <TM1637Display.h>
#include <NewPing.h>
const byte TRIGGER_PIN = 11;
const byte ECHO_PIN = 12;
const int MAX_DISTANCE = 500;
const byte CLK = 3;
const byte DIO = 4;
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);
TM1637Display display(CLK, DIO);
void setup()
{
Serial.begin(115200);
display.setBrightness(0x0f);
}
void loop()
{
delay(500);
int x = sonar.ping_cm();
display.showNumberDec(x,false,3,1);
Serial.print(x);
Serial.println(" cm");
}
- Library
Source: arduino.cc
MQ-2 Gas Sensor
- If using the sensor for first time, leave it powered on for about 24-48 hours(Burn-in Time).
- Just calibrate it to get about 100-150 from analogRead in a good air condition.
- Normal air returns ~100-150
const int sensorPin= 0;
const int buzzerPin= 11;
int smoke_level;
int powerLED = 13;
int greenLED = 9;
int redLED = 7;
int threshold = 400; // Your threshold value
int i = 0;
void setup() {
pinMode(sensorPin, INPUT); //the smoke sensor will be an input to the arduino
pinMode(buzzerPin, OUTPUT); //the buzzer serves an output in the circuit
pinMode(powerLED, OUTPUT);
Serial.begin(9600);
digitalWrite(buzzerPin, LOW); //keep buzzer silent on startup
}
void pulsePowerLED() {
digitalWrite(powerLED, HIGH);
delay(100);
digitalWrite(powerLED, LOW);
delay(100);
}
void alarm(){
for (int i=0; i<20; i++)
{
digitalWrite(powerLED, HIGH);
digitalWrite(buzzerPin, HIGH);
delay(500);
digitalWrite(powerLED, LOW);
digitalWrite(buzzerPin, LOW);
delay(100);
}
}
void loop() {
if (millis() / 1000 / 20 < 1) //we need to give the device some time to stabilize
{
Serial.println("Calibrating for 20 seconds... ");
while(millis() / 1000 / 20 < 1) {
pulsePowerLED(); //pulse our power / blue LED so the user knows something is happening
}
Serial.println("Calibrated.");
}
smoke_level= analogRead(sensorPin); //arduino reads the value from the smoke sensor
Serial.println(smoke_level);
if(smoke_level > threshold)
alarm();
else
digitalWrite(buzzerPin, LOW);
digitalWrite(powerLED, HIGH);
delay(100);
digitalWrite(powerLED, LOW);
delay(2000); // Wait for 2 seconds
}
DS18B20
Source: tweaking4all.com
#include <OneWire.h>
#include <DallasTemperature.h>
#include <TM1637Display.h>
#define ONE_WIRE_BUS 7
OneWire oneWire(ONE_WIRE_BUS); // Setup to communicate with any OneWire device
DallasTemperature sensors(&oneWire);
#define CLK 3
#define DIO 2
TM1637Display display(CLK, DIO);
void setup(void)
{
Serial.begin(9600);
Serial.println("Dallas Temperature IC Control Library");
sensors.begin();
sensors.setResolution(12);
display.setBrightness(0x0c);
}
void loop(void)
{
sensors.requestTemperatures(); // Send the command to get temperatures
delay(1000);
float temp = sensors.getTempCByIndex(0);
int temp2 = temp * 100;
display.showNumberDec(temp2);
Serial.print("Temperature is: ");
Serial.print(sensors.getTempCByIndex(0));
Serial.print(" C, ");
}
JHD162A LCD
Source: rastating.com, circuitstoday.com
Pin 1 to GND Pin 2 to 5v Pin 3 to center pin of 10k ohm Pot(103), One leg to +VCC & other to GND Pin 4 to Arduino pin 12 Pin 5 to GND Pin 6 to Arduino pin 11 Pin 11 to Arduino pin 5 Pin 12 to Arduino pin 4 Pin 13 to Arduino pin 3 Pin 14 to Arduino pin 2 Pin 15 to 5v through a 220 ohm resistor Pin 16 to GND
Simple Text:
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
int lastUpdate = 0;
int currentIndex = 0;
char* lyrics[] = {
"Drink all the...",
" BOOZE! ",
"Hack all the... ",
" THINGS! "
};
void setup() {
lcd.begin(16, 2); // LCD no of lines
}
void loop() {
int time = millis();
if ((time - lastUpdate) >= 800) // print next line after 800ms
{
lcd.setCursor(0, 0);
if (currentIndex == 0 || currentIndex == 2)
{
lcd.clear();
lcd.setCursor(0, 0);
lcd.print(lyrics[currentIndex]);
}
else
{
lcd.setCursor(0, 1);
lcd.print(lyrics[currentIndex]);
}
if (currentIndex == 3) // reset of increment index
{
currentIndex = 0;
}
else
{
currentIndex += 1;
}
lastUpdate = time;
}
}
Scrolling Text:
#include <LiquidCrystal.h>
int pos=0; // variable to hold cursor position
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void setup()
{
lcd.begin(16, 2); //initializes 16x2 LCD
lcd.print("Amandeep Singh & Mankirat Singh"); //text to display
}
void loop()
{
for(pos=0; pos<1; pos++)
{
lcd.scrollDisplayLeft(); //scrolls display left by two positions
}
delay(400); //sets the speed at which display moves
}
PIR Sensor
Source: instructables.com
int calibrationTime = 30; //time given to sensor to calibrate
long unsigned int lowIn;
long unsigned int pause = 5000;
boolean lockLow = true;
boolean takeLowTime;
int pirPin = 7; //Digital pin connected to the PIR sensor's output
int ledPin = 8;
void setup(){
Serial.begin(9600);
pinMode(pirPin, INPUT);
pinMode(ledPin, OUTPUT);
digitalWrite(pirPin, LOW);
Serial.print("calibrating sensor ");
for(int i = 0; i < calibrationTime; i++){
Serial.print(".");
delay(1000);
}
Serial.println(" done");
Serial.println("SENSOR ACTIVE");
delay(50);
}
void loop(){
if(digitalRead(pirPin) == HIGH){
digitalWrite(ledPin, HIGH);
if(lockLow){
lockLow = false;
Serial.println("---");
Serial.print("motion detected at ");
Serial.print(millis()/1000);
Serial.println(" sec");
delay(50);
}
takeLowTime = true;
}
if(digitalRead(pirPin) == LOW){
digitalWrite(ledPin, LOW);
if(takeLowTime){
lowIn = millis();
takeLowTime = false;
}
if(!lockLow && millis() - lowIn > pause){
lockLow = true;
Serial.print("motion ended at ");
Serial.print((millis() - pause)/1000);
Serial.println(" sec");
delay(50);
}
}
}
Reed Switch
Source: electroschematics.com
int ledOpen=8;
int ledClose=10;
int switchReed=6;
void setup(){
pinMode(ledOpen, OUTPUT);
pinMode(ledClose, OUTPUT);
pinMode(switchReed, INPUT);
Serial.begin(9600);
}
void loop(){
if (digitalRead(switchReed)==HIGH){
digitalWrite(ledOpen, LOW);
digitalWrite(ledClose, HIGH);
Serial.println("Your Door is Closed");
}
else {
digitalWrite(ledOpen, HIGH);
digitalWrite(ledClose, LOW);
Serial.println("Your Door is Open");
}
delay(1000);
}
LDR
Source: diyhacking.com
This project will allow you to turn On or Off a LED using LDR.
You can adjust amount of light by adjusting the value of 'sensorValue'.
#include <SoftwareSerial.h>
int sensorPin = A0; // select the input pin for the LDR
int sensorValue; // variable to store the value coming from the sensor
int led = 3;
void setup()
{
pinMode(led, OUTPUT);
Serial.begin(9600);
}
void loop()
{
sensorValue = analogRead(sensorPin);
Serial.println(sensorValue);
if(sensorValue < 300)
{
digitalWrite(led,HIGH);
delay(1000);
}
else
digitalWrite(led,LOW);
delay(1000);
}
Bluetooth Module
Source: instructables.com
#include <SoftwareSerial.h>
SoftwareSerial SoftSerial(10, 11); // RX, TX
int ledpin=13;
int BluetoothData;
void setup()
{
SoftSerial.begin(9600);
SoftSerial.println("Bluetooth On please press 1 or 0 blink LED ..");
pinMode(ledpin,OUTPUT);
}
void loop()
{
if (SoftSerial.available())
{
BluetoothData=SoftSerial.read();
if(BluetoothData=='1'){
digitalWrite(ledpin,1);
SoftSerial.println("LED On D13 ON ! ");
}
if (BluetoothData=='0')
{
digitalWrite(ledpin,0);
SoftSerial.println("LED On D13 Off ! ");
}
}
delay(100);
}
{{#widget:DISQUS |id=networkm |uniqid=Arduino Sensors |url=https://aman.awiki.org/wiki/Arduino_Sensors }}