im new to arduino, can i please know that how use two analog gas sensors,
a temparature sensor with the pulse sensor (www.pulsesensor.com), pulse sensor having interrupts
so i cant get serial output of those all in once, anyone know how to do that, what i need to do?
how to get all sensors output and pass to serial (bluetooth device) ?
please HELP ME!!!
What gas sensors ? What temperature sensor ? What BT device ? What have you got for code so far ?
SENSORS USING -------------------------------------------------------------------
MQ7 - Carbon monoxide sensor - https://www.sparkfun.com/datasheets/Sen … c/MQ-7.pdf
MQ2 - methane sensor - http://www.seeedstudio.com/depot/datasheet/MQ-2.pdf
DHT11 - temparature sensor - http://www.micro4you.com/files/sensor/DHT11.pdf
pulse sensor - www.pulsesensor.com
and i used arduino uno board for processing
thank you and please help…
CODE------------------------------------------------------------------------------
#include <DHT11.h>
int pin = 4;
DHT11 dht11(pin);
int coPin = A0;
int pulsePin = A1;
int methanePin = A2;
int pulseRate = 0;
int sensorValue = 0;
int tempValue = 0;
int methaneValue = 0;
int coValue = 0;
int blinkPin = 13; // pin to blink led at each beat
int fadePin = 5; // pin to do fancy classy fading blink at each beat
int fadeRate = 0; // used to fade LED on with PWM on fadePin
// these variables are volatile because they are used during the interrupt service routine!
volatile int BPM; // used to hold the pulse rate
volatile int Signal; // holds the incoming raw data
volatile int IBI = 600; // holds the time between beats, must be seeded!
volatile boolean Pulse = false; // true when pulse wave is high, false when it’s low
volatile boolean QS = false; // becomes true when Arduoino finds a beat.
void setup()
{
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
}
void loop()
{
interruptSetup();
sendDataToProcessing(‘S’, Signal); // send Processing the raw Pulse Sensor data
if (QS == true){ // Quantified Self flag is true when arduino finds a heartbeat
fadeRate = 255; // Set ‘fadeRate’ Variable to 255 to fade LED with pulse
sendDataToProcessing(‘B’,BPM); // send heart rate with a ‘B’ prefix
sendDataToProcessing(‘Q’,IBI); // send time between beats with a ‘Q’ prefix
QS = false; // reset the Quantified Self flag for next time
}
delay(20);
get_co();
get_methane();
get_temp();
delay(2000);
}
void get_co()
{
coValue = analogRead(coPin);
Serial.println(coValue);
}
void get_methane()
{
methaneValue = analogRead(methanePin);
Serial.println(methaneValue);
}
void get_temp()
{
int err;
float temp, humi;
err=dht11.read(humi, temp);
delay(DHT11_RETRY_DELAY); //delay for reread
Serial.println(temp);
Serial.println(humi);
}
void sendDataToProcessing(char symbol, int data ){
// symbol prefix tells Processing what type of data is coming
Serial.println(BPM); // the data to send culminating in a carriage return
}
/////////////// here is my code i think problem is with the code please help. thank you./////////////////
Mee_n_Mac:
What gas sensors ? What temperature sensor ? What BT device ? What have you got for code so far ?
[attachment=0]carnac-the-magnificent_pass.jpg[/attachment]
There’s so much missing in the above code I don’t know where to start. And it makes me wonder if the hardware is correct. IIRC the gas sensors require a high current, “high” voltage waveform on the heater alternating with a lower current waveform. Readings of the sense element are done during both phases and the gas % computed from them. But that requires that the Arduino know the timing of each phase. I don’t see that in the code. Nor do I see much of anything to do with the pulse sensor. You’re missing some functions; at least interruptSetup() and the actual interrupt service routine.
All of your sensors have well documented projects on the WWW. I suggest you look them over, pick the best article on each sensor, and learn the basic idea on how it works. Pick 1 sensor and get it working. Then add the other sensors, adding to and modifying the code as needed for each. Trying to copy bits of code from each and tossing them into a pot while stirring is NOT likely to work.
so can i please know some demos and tutorials of configuring gas sensor output, i want to get the ppm value from mq7 gas sensor so how to heat gas sensors, is there any method, can u please give me sample code, links or tutorial on properly configuring gas sensors to get correct ppm output? Thank you
Google is broken in Sri Lanka ? Maybe I should call someone about that ?
http://playground.arduino.cc/Main/MQGasSensors