Embedded Files
Second Generation of Arduino Code: Their are two codes, One compiles and tweets, but because none of the sensor work it just tweets zero and the other is an attempt
to incorporate the DHL11 sensor and this code never compiled. The working code is on top and the not working one is underneath.
Working Code
#include <Twitter.h>
#include <SPI.h>
#include <Ethernet.h>
#undef int() //inorder to make the stdlib.h work
#include <Stdlib.h>
float thermsen = A0;
float humidsen = A1;
int rainsen = 2;
int indicator = 13;
#define MQ_PIN (2) //define which analog input channel you are going to use
#define RL_VALUE (4.7) //define the load resistance on the board, in kilo ohms
#define RO_CLEAN_AIR_FACTOR (9.83) //RO_CLEAR_AIR_FACTOR=(Sensor resistance in clean air)/RO,
//which is derived from the chart in datasheet
/***********************Software Related Macros************************************/
#define CALIBARAION_SAMPLE_TIMES (50) //define how many samples you are going to take in the calibration phase
#define CALIBRATION_SAMPLE_INTERVAL (500) //define the time interal(in milisecond) between each samples in the
//cablibration phase
#define READ_SAMPLE_INTERVAL (50) //define how many samples you are going to take in normal operation
#define READ_SAMPLE_TIMES (5) //define the time interal(in milisecond) between each samples in
//normal operation
/**********************Application Related Macros**********************************/
#define GAS_LPG (0)
#define GAS_CO (1)
#define GAS_SMOKE (2)
/*****************************Globals***********************************************/
float LPGCurve[3] = {2.3, 0.21, -0.47}; //two points are taken from the curve.
//with these two points, a line is formed which is "approximately equivalent"
//to the original curve.
//data format:{ x, y, slope}; point1: (lg200, 0.21), point2: (lg10000, -0.59)
float COCurve[3] = {2.3, 0.72, -0.34}; //two points are taken from the curve.
//with these two points, a line is formed which is "approximately equivalent"
//to the original curve.
//data format:{ x, y, slope}; point1: (lg200, 0.72), point2: (lg10000, 0.15)
float SmokeCurve[3] = {2.3, 0.53, -0.44}; //two points are taken from the curve.
//with these two points, a line is formed which is "approximately equivalent"
//to the original curve.
//data format:{ x, y, slope}; point1: (lg200, 0.53), point2: (lg10000, -0.22)
float Ro = 10; //Ro is initialized to 10 kilo ohms
void setup() {
Serial.begin(115200);
pinMode(A0, INPUT);
pinMode(A1, INPUT);
pinMode(2, INPUT);
pinMode(13, OUTPUT);
/**********************************************************/
Serial.print("Calibrating...\n");
Ro = MQCalibration(MQ_PIN); //Calibrating the sensor. Please make sure the sensor is in clean air
//when you perform the calibration
Serial.print("Calibration is done...\n");
Serial.print("Ro=");
Serial.print(Ro);
Serial.print("kohm");
Serial.print("\n");
}
void loop() {
tweetMessage();
delay(3000);
}
//Manual Type-casting for sensor readings
char *dtostrf (double val, signed char width, unsigned char prec, char *sout)
{
char fmt[100];
sprintf(fmt, "%%%d.%df", width, prec);
sprintf(sout, fmt, val);
return sout;
}
//Twitter Message
void tweetMessage() {
Twitter twitter("4310592022-mfWjQTbSIQy9lFni7EZxcp93d1JRzyR4vtWrmno"); //Twitter Token
humidity();
float humid;
//Twitter message
String stringMsg = "Humidity:";
char tmp[10];
dtostrf(humid, 1, 2, tmp);
stringMsg += tmp;
stringMsg += "%RH";
temp_now();
int Temperature;
//Twitter message
stringMsg += " Temperature:";
char nowtemp[10];
dtostrf(Temperature, 1, 0, nowtemp);
stringMsg += nowtemp;
stringMsg += "°C";
MQ2printval();
float MQ2tweet;
//Twitter message
stringMsg += " CO level:";
char nowMQ2[10];
dtostrf(MQ2tweet, 1, 2, nowMQ2);
stringMsg += nowMQ2;
stringMsg += "ppm";
if (digitalRead(2) == HIGH)
{
stringMsg += " Rain Alert";
}
stringMsg += " #Betatesting #raintest #IOTweatherstation #Mumbai #Bandra #CarterRoad ";
//Convert our message to a character array //Twiiter Character Limit. Converts/limits message to 140 characters.
char msg[140];
stringMsg.toCharArray(msg, 140);
//Tweet that sucker!
if (twitter.post(msg))
{
int status = twitter.wait();
if (status == 200)
{
Serial.println("OK.");
Serial.println("Message Tweeted");
}
else
{ //Connection Test
Serial.print("failed : code ");
Serial.println("Message not Tweeted");
Serial.println(status);
}
}
else
{
Serial.println("connection failed.");
Serial.println("Message not Tweeted");
}
digitalWrite(13, HIGH); // LED Indicator Feedback Code Working.
}
/********Serial print MQ2 Value****************/
void MQ2printval()
{
float MQ2tweet = (MQGetGasPercentage(MQRead(MQ_PIN) / Ro, GAS_LPG));
Serial.print("LPG:");
Serial.print(MQGetGasPercentage(MQRead(MQ_PIN) / Ro, GAS_LPG) );
Serial.print( "ppm" );
Serial.print(" ");
Serial.print("CO:");
Serial.print(MQGetGasPercentage(MQRead(MQ_PIN) / Ro, GAS_CO) );
Serial.print( "ppm" );
Serial.print(" ");
Serial.print("SMOKE:");
Serial.print(MQGetGasPercentage(MQRead(MQ_PIN) / Ro, GAS_SMOKE) );
Serial.print( "ppm" );
Serial.print("\n");
}
/****************** MQResistanceCalculation ****************************************
Input: raw_adc - raw value read from adc, which represents the voltage
Output: the calculated sensor resistance
Remarks: The sensor and the load resistor forms a voltage divider. Given the voltage
across the load resistor and its resistance, the resistance of the sensor
could be derived.
************************************************************************************/
float MQResistanceCalculation(int raw_adc)
{
return ( ((float)RL_VALUE * (1023 - raw_adc) / raw_adc));
}
/***************************** MQCalibration ****************************************
Input: mq_pin - analog channel
Output: Ro of the sensor
Remarks: This function assumes that the sensor is in clean air. It use
MQResistanceCalculation to calculates the sensor resistance in clean air
and then divides it with RO_CLEAN_AIR_FACTOR. RO_CLEAN_AIR_FACTOR is about
10, which differs slightly between different sensors.
************************************************************************************/
float MQCalibration(int mq_pin)
{
int i;
float val = 0;
for (i = 0; i < CALIBARAION_SAMPLE_TIMES; i++) { //take multiple samples
val += MQResistanceCalculation(analogRead(mq_pin));
delay(CALIBRATION_SAMPLE_INTERVAL);
}
val = val / CALIBARAION_SAMPLE_TIMES; //calculate the average value
val = val / RO_CLEAN_AIR_FACTOR; //divided by RO_CLEAN_AIR_FACTOR yields the Ro
//according to the chart in the datasheet
return val;
}
/***************************** MQRead *********************************************
Input: mq_pin - analog channel
Output: Rs of the sensor
Remarks: This function use MQResistanceCalculation to caculate the sensor resistenc (Rs).
The Rs changes as the sensor is in the different consentration of the target
gas. The sample times and the time interval between samples could be configured
by changing the definition of the macros.
************************************************************************************/
float MQRead(int mq_pin)
{
int i;
float rs = 0;
for (i = 0; i < READ_SAMPLE_TIMES; i++) {
rs += MQResistanceCalculation(analogRead(mq_pin));
delay(READ_SAMPLE_INTERVAL);
}
rs = rs / READ_SAMPLE_TIMES;
return rs;
}
/***************************** MQGetGasPercentage **********************************
Input: rs_ro_ratio - Rs divided by Ro
gas_id - target gas type
Output: ppm of the target gas
Remarks: This function passes different curves to the MQGetPercentage function which
calculates the ppm (parts per million) of the target gas.
************************************************************************************/
int MQGetGasPercentage(float rs_ro_ratio, int gas_id)
{
if ( gas_id == GAS_LPG ) {
return MQGetPercentage(rs_ro_ratio, LPGCurve);
} else if ( gas_id == GAS_CO ) {
return MQGetPercentage(rs_ro_ratio, COCurve);
} else if ( gas_id == GAS_SMOKE ) {
return MQGetPercentage(rs_ro_ratio, SmokeCurve);
}
return 0;
}
/***************************** MQGetPercentage **********************************
Input: rs_ro_ratio - Rs divided by Ro
pcurve - pointer to the curve of the target gas
Output: ppm of the target gas
Remarks: By using the slope and a point of the line. The x(logarithmic value of ppm)
of the line could be derived if y(rs_ro_ratio) is provided. As it is a
logarithmic coordinate, power of 10 is used to convert the result to non-logarithmic
value.
************************************************************************************/
int MQGetPercentage(float rs_ro_ratio, float *pcurve)
{
return (pow(10, ( ((log(rs_ro_ratio) - pcurve[1]) / pcurve[2]) + pcurve[0])));
}
/******Humidity***********/
void humidity()
{
int humidSensorValue = analogRead(A1);
// Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
// Multiply by 1000 so that map() function can work properly. map() does not count numbers after the decimal.
float humidvoltage = humidSensorValue * (5.0 / 1023.0) * 1000;
// When Humidity is 20%RH Voltage is 660mV. When Humidity is 95%RH Voltage is 3135mV.
float humid = map(humidvoltage, 660, 3135, 20, 95);
// print out the value of humidity:
Serial.print("Humidity:");
Serial.print(humid);
Serial.println();
}
/**************Temperature*************/
void temp_now()
{
float tempSensorValue = analogRead(A0);
// Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
float voltage = tempSensorValue * (5.0 / 1023.0);
// print out the value you read:
//Serial.print("Voltage(V)= ");
//Serial.print(voltage);
//Serial.println();
int Temperature;
if ((voltage > 2.521) && (voltage < 2.585))
{
Temperature = 0;
}
if ((voltage > 2.585) && (voltage < 2.648))
{
Temperature = 1 ;
}
if ((voltage > 2.648) && (voltage < 2.711))
{
Temperature = 2;
}
if ((voltage > 2.711) && (voltage < 2.773))
{
Temperature = 3;
;
}
if ((voltage > 2.773) && (voltage < 2.834))
{
Temperature = 4;
}
if ((voltage > 2.834) && (voltage < 2.894))
{
Temperature = 5;
}
if ((voltage > 2.894) && (voltage < 2.95))
{
Temperature = 6;
}
if ((voltage > 2.95) && (voltage < 3.01))
{
Temperature = 7;
}
if ((voltage > 3.01) && (voltage < 3.07))
{
Temperature = 8;
}
if ((voltage > 3.07) && (voltage < 3.13))
{
Temperature = 9;
}
if ((voltage > 3.13) && (voltage < 3.18))
{
Temperature = 10;
}
if ((voltage > 3.18) && (voltage < 3.24))
{
Temperature = 11;
}
if ((voltage > 3.24) && (voltage < 3.29))
{
Temperature = 12;
}
if ((voltage > 3.29) && (voltage < 3.34))
{
Temperature = 13;
}
if ((voltage > 3.34) && (voltage < 3.40))
{
Temperature = 14;
}
if ((voltage > 3.40) && (voltage < 3.45))
{
Temperature = 15;
}
if ((voltage > 3.45) && (voltage < 3.5))
{
Temperature = 16;
}
if ((voltage > 3.5) && (voltage < 3.54))
{
Temperature = 17;
}
if ((voltage > 3.54) && (voltage < 3.59))
{
Temperature = 18;
}
if ((voltage > 3.59) && (voltage < 3.64))
{
Temperature = 19;
}
if ((voltage > 3.64) && (voltage < 3.68))
{
Temperature = 20;
}
if ((voltage > 3.68) && (voltage < 3.72))
{
Temperature = 21;
}
if ((voltage > 3.72) && (voltage < 3.76))
{
Temperature = 22;
}
if ((voltage > 3.76) && (voltage < 3.81))
{
Temperature = 23;
}
if ((voltage > 3.81) && (voltage < 3.85))
{
Temperature = 24;
}
if ((voltage > 3.85) && (voltage < 3.88))
{
Temperature = 25;
}
if ((voltage > 3.88) && (voltage < 3.92))
{
Temperature = 26;
}
if ((voltage > 3.92) && (voltage < 3.96))
{
Temperature = 27;
}
if ((voltage > 3.96) && (voltage < 3.99))
{
Temperature = 28;
}
if ((voltage > 3.99) && (voltage < 4.03))
{
Temperature = 29;
}
if ((voltage > 4.03) && (voltage < 4.06))
{
Temperature = 30;
}
if ((voltage > 4.06) && (voltage < 4.09))
{
Temperature = 31;
}
if ((voltage > 4.09) && (voltage < 4.12))
{
Temperature = 32;
}
if ((voltage > 4.12) && (voltage < 4.15))
{
Temperature = 33;
}
if ((voltage > 4.15) && (voltage < 4.18))
{
Temperature = 34;
}
if ((voltage > 4.18) && (voltage < 4.21))
{
Temperature = 35;
}
if ((voltage > 4.21) && (voltage < 4.24))
{
Temperature = 36;
}
if ((voltage > 4.24) && (voltage < 4.26))
{
Temperature = 37;
}
if ((voltage > 4.26) && (voltage < 4.29))
{
Temperature = 38;
}
if ((voltage > 4.29) && (voltage < 4.31))
{
Temperature = 39;
}
if ((voltage > 4.31) && (voltage < 4.34))
{
Temperature = 40;
}
if ((voltage > 4.34) && (voltage < 4.36))
{
Temperature = 41;
}
if ((voltage > 4.36) && (voltage < 4.38))
{
Temperature = 42;
}
if ((voltage > 4.38) && (voltage < 4.4))
{
Temperature = 43;
}
if ((voltage > 4.4) && (voltage < 4.42))
{
Temperature = 44;
}
if ((voltage > 4.42) && (voltage < 4.44))
{
Temperature = 45;
}
if ((voltage > 4.44) && (voltage < 4.46))
{
Temperature = 46;
}
if ((voltage > 4.46) && (voltage < 4.48))
{
Temperature = 47;
}
if ((voltage > 4.48) && (voltage < 4.5))
{
Temperature = 48;
}
if ((voltage > 4.5) && (voltage < 4.51))
{
Temperature = 49;
}
if ((voltage > 4.51) && (voltage < 4.52))
{
Temperature = 50;
}
Serial.print("Temperature:");
Serial.print(Temperature);
Serial.println();
}
DHL11 Incorporating code
// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain
#include "DHT.h"
#define DHTPIN 3 // what digital pin we're connected to
// Uncomment whatever type you're using!
#define DHTTYPE DHT11 // DHT 11
//#define DHTTYPE DHT22 // DHT 22 (AM2302), AM232
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
// Connect pin 1 (on the left) of the sensor to +5V
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
// to 3.3V instead of 5V!
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor
// Initialize DHT sensor.
// Note that older versions of this library took an optional third parameter to
// tweak the timings for faster processors. This parameter is no longer needed
// as the current DHT reading algorithm adjusts itself to work on faster procs.
DHT dht(DHTPIN, DHTTYPE);
void setup() {
Serial.begin(9600);
Serial.println("DHTxx test!");
dht.begin();
}
void loop() {
// Wait a few seconds between measurements.
delay(2000);
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
float h = dht.readHumidity();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
// Read temperature as Fahrenheit (isFahrenheit = true)
float f = dht.readTemperature(true);
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
// Compute heat index in Fahrenheit (the default)
float hif = dht.computeHeatIndex(f, h);
// Compute heat index in Celsius (isFahreheit = false)
float hic = dht.computeHeatIndex(t, h, false);
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t");
Serial.print("Temperature: ");
Serial.print(t);
Serial.print(" *C ");
Serial.print(f);
Serial.print(" *F\t");
Serial.print("Heat index: ");
Serial.print(hic);
Serial.print(" *C ");
Serial.print(hif);
Serial.println(" *F");
}
Old Code
#include <Twitter.h>
#include <SPI.h>
#include <Ethernet.h>
//Add something before because currently this is not a library!!!
#include <stdlib.h>
float thermsen = A0;
float humidsen = A1;
int rainsen = 2;
int indicator=13;
#define MQ_PIN (2) //define which analog input channel you are going to use
#define RL_VALUE (4.7) //define the load resistance on the board, in kilo ohms
#define RO_CLEAN_AIR_FACTOR (9.83) //RO_CLEAR_AIR_FACTOR=(Sensor resistance in clean air)/RO,
//which is derived from the chart in datasheet
/***********************Software Related Macros************************************/
#define CALIBARAION_SAMPLE_TIMES (50) //define how many samples you are going to take in the calibration phase
#define CALIBRATION_SAMPLE_INTERVAL (500) //define the time interal(in milisecond) between each samples in the
//cablibration phase
#define READ_SAMPLE_INTERVAL (50) //define how many samples you are going to take in normal operation
#define READ_SAMPLE_TIMES (5) //define the time interal(in milisecond) between each samples in
//normal operation
/**********************Application Related Macros**********************************/
#define GAS_LPG (0)
#define GAS_CO (1)
#define GAS_SMOKE (2)
/*****************************Globals***********************************************/
float LPGCurve[3] = {2.3,0.21,-0.47}; //two points are taken from the curve.
//with these two points, a line is formed which is "approximately equivalent"
//to the original curve.
//data format:{ x, y, slope}; point1: (lg200, 0.21), point2: (lg10000, -0.59)
float COCurve[3] = {2.3,0.72,-0.34}; //two points are taken from the curve.
//with these two points, a line is formed which is "approximately equivalent"
//to the original curve.
//data format:{ x, y, slope}; point1: (lg200, 0.72), point2: (lg10000, 0.15)
float SmokeCurve[3] ={2.3,0.53,-0.44}; //two points are taken from the curve.
//with these two points, a line is formed which is "approximately equivalent"
//to the original curve.
//data format:{ x, y, slope}; point1: (lg200, 0.53), point2: (lg10000, -0.22)
float Ro = 10; //Ro is initialized to 10 kilo ohms
void setup() {
Serial.begin(115200);
pinMode(A0, INPUT);
pinMode(A1, INPUT);
pinMode(2, INPUT);
pinMode(13,OUTPUT);
/**********************************************************/
Serial.print("Calibrating...\n");
Ro = MQCalibration(MQ_PIN); //Calibrating the sensor. Please make sure the sensor is in clean air
//when you perform the calibration
Serial.print("Calibration is done...\n");
Serial.print("Ro=");
Serial.print(Ro);
Serial.print("kohm");
Serial.print("\n");
}
void loop() {
tweetMessage();
delay(900000);
}
//Manual Type-casting for sensor readings
char *dtostrf (double val, signed char width, unsigned char prec, char *sout)
{
char fmt[100];
sprintf(fmt, "%%%d.%df", width, prec);
sprintf(sout, fmt, val);
return sout;
}
//Twitter Message
void tweetMessage() {
Twitter twitter("4310592022-mfWjQTbSIQy9lFni7EZxcp93d1JRzyR4vtWrmno"); //Twitter Token
humidity();
float humid;
//Twitter message
String stringMsg = "Humidity:";
char tmp[10];
dtostrf(humid, 1, 2, tmp);
stringMsg += tmp;
stringMsg += "%RH";
temp_now();
int Temperature;
//Twitter message
stringMsg += " Temperature:";
char nowtemp[10];
dtostrf(Temperature, 1, 0, nowtemp);
stringMsg += nowtemp;
stringMsg += "°C";
MQ2printval();
float MQ2tweet;
//Twitter message
stringMsg += " CO level:";
char nowMQ2[10];
dtostrf(MQ2tweet,1,2,nowMQ2);
stringMsg += nowMQ2;
stringMsg += "ppm";
if(digitalRead(2)==HIGH)
{
stringMsg += " Rain Alert";
}
stringMsg += " #Betatesting #raintest #IOTweatherstation #Mumbai #Bandra #CarterRoad ";
//Convert our message to a character array //Twiiter Character Limit. Converts/limits message to 140 characters.
char msg[140];
stringMsg.toCharArray(msg, 140);
//Tweet that sucker!
if (twitter.post(msg))
{
int status = twitter.wait();
if (status == 200)
{
Serial.println("OK.");
Serial.println("Message Tweeted");
}
else
{ //Connection Test
Serial.print("failed : code ");
Serial.println("Message not Tweeted");
Serial.println(status);
}
}
else
{
Serial.println("connection failed.");
Serial.println("Message not Tweeted");
}
digitalWrite(13,HIGH);// LED Indicator Feedback Code Working.
}
/********Serial print MQ2 Value****************/
void MQ2printval()
{
float MQ2tweet= (MQGetGasPercentage(MQRead(MQ_PIN)/Ro,GAS_LPG));
Serial.print("LPG:");
Serial.print(MQGetGasPercentage(MQRead(MQ_PIN)/Ro,GAS_LPG) );
Serial.print( "ppm" );
Serial.print(" ");
Serial.print("CO:");
Serial.print(MQGetGasPercentage(MQRead(MQ_PIN)/Ro,GAS_CO) );
Serial.print( "ppm" );
Serial.print(" ");
Serial.print("SMOKE:");
Serial.print(MQGetGasPercentage(MQRead(MQ_PIN)/Ro,GAS_SMOKE) );
Serial.print( "ppm" );
Serial.print("\n");
}
/****************** MQResistanceCalculation ****************************************
Input: raw_adc - raw value read from adc, which represents the voltage
Output: the calculated sensor resistance
Remarks: The sensor and the load resistor forms a voltage divider. Given the voltage
across the load resistor and its resistance, the resistance of the sensor
could be derived.
************************************************************************************/
float MQResistanceCalculation(int raw_adc)
{
return ( ((float)RL_VALUE*(1023-raw_adc)/raw_adc));
}
/***************************** MQCalibration ****************************************
Input: mq_pin - analog channel
Output: Ro of the sensor
Remarks: This function assumes that the sensor is in clean air. It use
MQResistanceCalculation to calculates the sensor resistance in clean air
and then divides it with RO_CLEAN_AIR_FACTOR. RO_CLEAN_AIR_FACTOR is about
10, which differs slightly between different sensors.
************************************************************************************/
float MQCalibration(int mq_pin)
{
int i;
float val=0;
for (i=0;i<CALIBARAION_SAMPLE_TIMES;i++) { //take multiple samples
val += MQResistanceCalculation(analogRead(mq_pin));
delay(CALIBRATION_SAMPLE_INTERVAL);
}
val = val/CALIBARAION_SAMPLE_TIMES; //calculate the average value
val = val/RO_CLEAN_AIR_FACTOR; //divided by RO_CLEAN_AIR_FACTOR yields the Ro
//according to the chart in the datasheet
return val;
}
/***************************** MQRead *********************************************
Input: mq_pin - analog channel
Output: Rs of the sensor
Remarks: This function use MQResistanceCalculation to caculate the sensor resistenc (Rs).
The Rs changes as the sensor is in the different consentration of the target
gas. The sample times and the time interval between samples could be configured
by changing the definition of the macros.
************************************************************************************/
float MQRead(int mq_pin)
{
int i;
float rs=0;
for (i=0;i<READ_SAMPLE_TIMES;i++) {
rs += MQResistanceCalculation(analogRead(mq_pin));
delay(READ_SAMPLE_INTERVAL);
}
rs = rs/READ_SAMPLE_TIMES;
return rs;
}
/***************************** MQGetGasPercentage **********************************
Input: rs_ro_ratio - Rs divided by Ro
gas_id - target gas type
Output: ppm of the target gas
Remarks: This function passes different curves to the MQGetPercentage function which
calculates the ppm (parts per million) of the target gas.
************************************************************************************/
int MQGetGasPercentage(float rs_ro_ratio, int gas_id)
{
if ( gas_id == GAS_LPG ) {
return MQGetPercentage(rs_ro_ratio,LPGCurve);
} else if ( gas_id == GAS_CO ) {
return MQGetPercentage(rs_ro_ratio,COCurve);
} else if ( gas_id == GAS_SMOKE ) {
return MQGetPercentage(rs_ro_ratio,SmokeCurve);
}
return 0;
}
/***************************** MQGetPercentage **********************************
Input: rs_ro_ratio - Rs divided by Ro
pcurve - pointer to the curve of the target gas
Output: ppm of the target gas
Remarks: By using the slope and a point of the line. The x(logarithmic value of ppm)
of the line could be derived if y(rs_ro_ratio) is provided. As it is a
logarithmic coordinate, power of 10 is used to convert the result to non-logarithmic
value.
************************************************************************************/
int MQGetPercentage(float rs_ro_ratio, float *pcurve)
{
return (pow(10,( ((log(rs_ro_ratio)-pcurve[1])/pcurve[2]) + pcurve[0])));
}
/******Humidity***********/
void humidity()
{
int humidSensorValue = analogRead(A1);
// Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
// Multiply by 1000 so that map() function can work properly. map() does not count numbers after the decimal.
float humidvoltage = humidSensorValue * (5.0 / 1023.0) * 1000;
// When Humidity is 20%RH Voltage is 660mV. When Humidity is 95%RH Voltage is 3135mV.
float humid = map(humidvoltage, 660, 3135, 20, 95);
// print out the value of humidity:
Serial.print("Humidity:");
Serial.print(humid);
Serial.println();
}
/**************Temperature*************/
void temp_now()
{
float tempSensorValue = analogRead(A0);
// Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
float voltage = tempSensorValue * (5.0 / 1023.0);
// print out the value you read:
//Serial.print("Voltage(V)= ");
//Serial.print(voltage);
//Serial.println();
int Temperature;
if ((voltage > 2.521) && (voltage < 2.585))
{
Temperature = 0;
}
if ((voltage > 2.585) && (voltage < 2.648))
{
Temperature = 1 ;
}
if ((voltage > 2.648) && (voltage < 2.711))
{
Temperature = 2;
}
if ((voltage > 2.711) && (voltage < 2.773))
{
Temperature = 3;
;
}
if ((voltage > 2.773) && (voltage < 2.834))
{
Temperature = 4;
}
if ((voltage > 2.834) && (voltage < 2.894))
{
Temperature = 5;
}
if ((voltage > 2.894) && (voltage < 2.95))
{
Temperature = 6;
}
if ((voltage > 2.95) && (voltage < 3.01))
{
Temperature = 7;
}
if ((voltage > 3.01) && (voltage < 3.07))
{
Temperature = 8;
}
if ((voltage > 3.07) && (voltage < 3.13))
{
Temperature = 9;
}
if ((voltage > 3.13) && (voltage < 3.18))
{
Temperature = 10;
}
if ((voltage > 3.18) && (voltage < 3.24))
{
Temperature = 11;
}
if ((voltage > 3.24) && (voltage < 3.29))
{
Temperature = 12;
}
if ((voltage > 3.29) && (voltage < 3.34))
{
Temperature = 13;
}
if ((voltage > 3.34) && (voltage < 3.40))
{
Temperature = 14;
}
if ((voltage > 3.40) && (voltage < 3.45))
{
Temperature = 15;
}
if ((voltage > 3.45) && (voltage < 3.5))
{
Temperature = 16;
}
if ((voltage > 3.5) && (voltage < 3.54))
{
Temperature = 17;
}
if ((voltage > 3.54) && (voltage < 3.59))
{
Temperature = 18;
}
if ((voltage > 3.59) && (voltage < 3.64))
{
Temperature = 19;
}
if ((voltage > 3.64) && (voltage < 3.68))
{
Temperature = 20;
}
if ((voltage > 3.68) && (voltage < 3.72))
{
Temperature = 21;
}
if ((voltage > 3.72) && (voltage < 3.76))
{
Temperature = 22;
}
if ((voltage > 3.76) && (voltage < 3.81))
{
Temperature = 23;
}
if ((voltage > 3.81) && (voltage < 3.85))
{
Temperature = 24;
}
if ((voltage > 3.85) && (voltage < 3.88))
{
Temperature = 25;
}
if ((voltage > 3.88) && (voltage < 3.92))
{
Temperature = 26;
}
if ((voltage > 3.92) && (voltage < 3.96))
{
Temperature = 27;
}
if ((voltage > 3.96) && (voltage < 3.99))
{
Temperature = 28;
}
if ((voltage > 3.99) && (voltage < 4.03))
{
Temperature = 29;
}
if ((voltage > 4.03) && (voltage < 4.06))
{
Temperature = 30;
}
if ((voltage > 4.06) && (voltage < 4.09))
{
Temperature = 31;
}
if ((voltage > 4.09) && (voltage < 4.12))
{
Temperature = 32;
}
if ((voltage > 4.12) && (voltage < 4.15))
{
Temperature = 33;
}
if ((voltage > 4.15) && (voltage < 4.18))
{
Temperature = 34;
}
if ((voltage > 4.18) && (voltage < 4.21))
{
Temperature = 35;
}
if ((voltage > 4.21) && (voltage < 4.24))
{
Temperature = 36;
}
if ((voltage > 4.24) && (voltage < 4.26))
{
Temperature = 37;
}
if ((voltage > 4.26) && (voltage < 4.29))
{
Temperature = 38;
}
if ((voltage > 4.29) && (voltage < 4.31))
{
Temperature = 39;
}
if ((voltage > 4.31) && (voltage < 4.34))
{
Temperature = 40;
}
if ((voltage > 4.34) && (voltage < 4.36))
{
Temperature = 41;
}
if ((voltage > 4.36) && (voltage < 4.38))
{
Temperature = 42;
}
if ((voltage > 4.38) && (voltage < 4.4))
{
Temperature = 43;
}
if ((voltage > 4.4) && (voltage < 4.42))
{
Temperature = 44;
}
if ((voltage > 4.42) && (voltage < 4.44))
{
Temperature = 45;
}
if ((voltage > 4.44) && (voltage < 4.46))
{
Temperature = 46;
}
if ((voltage > 4.46) && (voltage < 4.48))
{
Temperature = 47;
}
if ((voltage > 4.48) && (voltage < 4.5))
{
Temperature = 48;
}
if ((voltage > 4.5) && (voltage < 4.51))
{
Temperature = 49;
}
if ((voltage > 4.51) && (voltage < 4.52))
{
Temperature = 50;
}
Serial.print("Temperature:");
Serial.print(Temperature);
Serial.println();
}
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