From: Roman Bazalevskiy Date: Tue, 19 May 2015 13:50:33 +0000 (+0300) Subject: Version with MQ135 Air Quality sensor. X-Git-Url: https://git.rvb.name/weathermon.git/commitdiff_plain/4177ee347c6a063ac3e115d5419edfc2ae5d67fe?hp=4dc5359f5dc079715d4351475d29cabe5fe8b355 Version with MQ135 Air Quality sensor. --- diff --git a/Weather_Station.ino b/Weather_Station.ino new file mode 100644 index 0000000..9358d3d --- /dev/null +++ b/Weather_Station.ino @@ -0,0 +1,272 @@ +/* SFE_BMP180 library example sketch + +This sketch shows how to use the SFE_BMP180 library to read the +Bosch BMP180 barometric pressure sensor. +https://www.sparkfun.com/products/11824 + +Like most pressure sensors, the BMP180 measures absolute pressure. +This is the actual ambient pressure seen by the device, which will +vary with both altitude and weather. + +Before taking a pressure reading you must take a temparture reading. +This is done with startTemperature() and getTemperature(). +The result is in degrees C. + +Once you have a temperature reading, you can take a pressure reading. +This is done with startPressure() and getPressure(). +The result is in millibar (mb) aka hectopascals (hPa). + +If you'll be monitoring weather patterns, you will probably want to +remove the effects of altitude. This will produce readings that can +be compared to the published pressure readings from other locations. +To do this, use the sealevel() function. You will need to provide +the known altitude at which the pressure was measured. + +If you want to measure altitude, you will need to know the pressure +at a baseline altitude. This can be average sealevel pressure, or +a previous pressure reading at your altitude, in which case +subsequent altitude readings will be + or - the initial baseline. +This is done with the altitude() function. + +Hardware connections: + +- (GND) to GND ++ (VDD) to 3.3V + +(WARNING: do not connect + to 5V or the sensor will be damaged!) + +You will also need to connect the I2C pins (SCL and SDA) to your +Arduino. The pins are different on different Arduinos: + +Any Arduino pins labeled: SDA SCL +Uno, Redboard, Pro: A4 A5 +Mega2560, Due: 20 21 +Leonardo: 2 3 + +Leave the IO (VDDIO) pin unconnected. This pin is for connecting +the BMP180 to systems with lower logic levels such as 1.8V + +Have fun! -Your friends at SparkFun. + +The SFE_BMP180 library uses floating-point equations developed by the +Weather Station Data Logger project: http://wmrx00.sourceforge.net/ + +Our example code uses the "beerware" license. You can do anything +you like with this code. No really, anything. If you find it useful, +buy me a beer someday. + +V10 Mike Grusin, SparkFun Electronics 10/24/2013 +*/ + +// Your sketch must #include this library, and the Wire library. +// (Wire is a standard library included with Arduino.): + +#include +#include +#include "DHT.h" + +// You will need to create an SFE_BMP180 object, here called "pressure": + +SFE_BMP180 pressure; + +// DHT object for humidity sensor +DHT dht; + +#define CO2_PIN A1 +#define DHT_PIN 4 +#define GAS_PIN A0 +#define START_DELAY 20000 +#define DELAY 50000 + +byte HasBaro; + +#define READ_SAMPLE_INTERVAL 50 +#define READ_SAMPLE_TIMES 5 + +#define MQ135_RES 1000 + +float MQRead(int mq_pin) +{ + + int i; + float rs=0; + float rr; + + for (i=0;i