{"id":2079,"date":"2019-02-05T15:57:02","date_gmt":"2019-02-05T15:57:02","guid":{"rendered":"http:\/\/jjamwal.in\/yayavar\/?p=2079"},"modified":"2023-11-04T15:36:04","modified_gmt":"2023-11-04T15:36:04","slug":"adruino-project-pollution-sensor-system-initial-setup","status":"publish","type":"post","link":"https:\/\/jjamwal.in\/yayavar\/adruino-project-pollution-sensor-system-initial-setup\/","title":{"rendered":"Arduino Project : Pollution Sensor System, initial setup."},"content":{"rendered":"\n<p>I had an Arduino kit lying around for a long time but never did anything with it. Few days back I bought a few sensors and started to build a pollution sensor system consisting of atleast two sensors for now and multiple ways of monitoring. I don&#8217;t know any programing and most of the code is copied from different sources and modified wherever required to suit my requirements. As I worked, it became clear that it is not as easy job, so this project is going to be split in to multiple steps.<\/p>\n\n\n\n<p>This project uses two different sensors, a simple MQ135 and a Sharp&nbsp;GP2Y1010. Data sheets are easily available on internet, but for quick reading here are short descriptions:<\/p>\n\n\n\n<p><strong>MQ135: <\/strong>It is a simple sensor used to measure presence of some common pollutants like NH3, NOx, Alcohol, Benzene, Smoke, CO2.&nbsp; It has 4 pins, two for power supply and 2 for analog and digital readings. <\/p>\n\n\n\n<p><strong>Sharp&nbsp;GP2Y1010<\/strong> is an optical dust sensor which measures the volume of suspended dust particles in air by using a LED and phototransistor. It has 6 pins.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/jjamwal.in\/yayavar\/wp-content\/uploads\/2019\/02\/Adruino-pollution-sensor-project.jpg\" alt=\"Adruino pollution sensor project with MQ135 and Sharp GP2Y1010\" class=\"wp-image-2080\" width=\"600\" height=\"583\" srcset=\"https:\/\/jjamwal.in\/yayavar\/wp-content\/uploads\/2019\/02\/Adruino-pollution-sensor-project.jpg 800w, https:\/\/jjamwal.in\/yayavar\/wp-content\/uploads\/2019\/02\/Adruino-pollution-sensor-project-300x291.jpg 300w, https:\/\/jjamwal.in\/yayavar\/wp-content\/uploads\/2019\/02\/Adruino-pollution-sensor-project-768x746.jpg 768w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n\n\n\n<p><strong>BASICS:<\/strong><\/p>\n\n\n\n<p><strong>1 POWER SUPPLY:<\/strong> As of now, Arduino is powered by a USB cable connected to PC. I also have a 9V compatible power supply which can be used once it&#8217;s disconnected from PC. I have a old powered USB hub which I plan to use in order to supply a 5V supply later to some components which will be added later. This may be necessary as some components seem to require a bit more power.<\/p>\n\n\n\n<p><strong>2. ARDUINO : <\/strong>A basic Arduino Uno board. <\/p>\n\n\n\n<p><strong>3. BASE:<\/strong> As of now, I am using breadboard for prototyping stage. If everything goes well, I may rebuild it in a more permanent way.<\/p>\n\n\n\n<p><strong>4. OUTPUT:<\/strong>  All the output is being sent to Serial Monitor of Arduino programming interface. A LCD screen and an internet server interface will be added later.<\/p>\n\n\n\n<p><strong>Sharp&nbsp;GP2Y1010 Configuration<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pin 1 &#8211;  Connected to&nbsp;+ve of 220 microF capacitor. -ve of capacitor connected to ground. A 150 Ohm resistor connected to 5 V. <\/li>\n\n\n\n<li>Pin 2 &#8211; Connected to&nbsp; -ve of capacitor<\/li>\n\n\n\n<li>Pin 3 &#8211; Connected to D11 on Arduino<\/li>\n\n\n\n<li>Pin 4 &#8211; Connected to ground.<\/li>\n\n\n\n<li>Pin 5 &#8211; Connected to A0 on Arduino<\/li>\n\n\n\n<li> Pin 6 &#8211; Connected to 5V <\/li>\n<\/ul>\n\n\n\n<p><strong>CODE:<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p> <br>int measurePin = 0; \/\/ Connected to pin 3<br>int ledPower = 11;&nbsp; \/\/ Connected to pin 5<br>&nbsp;<br>int samplingTime = 280;<br>int deltaTime = 40;<br>int sleepTime = 9680;<br>&nbsp;<br>float voMeasured = 0;<br>float calcVoltage = 0;<br>float dustDensity = 0;<br>&nbsp;<br>void setup(){<br>&nbsp; Serial.begin(9600);<br>&nbsp; pinMode(ledPower,OUTPUT);<br>}<br>&nbsp;<br>void loop(){<br>&nbsp; digitalWrite(ledPower,LOW); \/\/ power on the LED<br>&nbsp; delayMicroseconds(samplingTime);<br>&nbsp;<br>&nbsp; voMeasured = analogRead(measurePin); \/\/ read the dust value<br>&nbsp;<br>&nbsp; delayMicroseconds(deltaTime);<br>&nbsp; digitalWrite(ledPower,HIGH); \/\/ turn the LED off<br>&nbsp; delayMicroseconds(sleepTime);<br>&nbsp;<br>&nbsp; \/\/ 0 &#8211; 5V mapped to 0 &#8211; 1023 integer values<br>&nbsp; \/\/ recover voltage<br>&nbsp; calcVoltage = voMeasured * (5.0 \/ 1024);<br>&nbsp;<br>&nbsp; \/\/ linear eqaution taken from&nbsp;<a rel=\"noreferrer noopener\" href=\"http:\/\/www.howmuchsnow.com\/arduino\/airquality\/\" target=\"_blank\">http:\/\/www.howmuchsnow.com\/arduino\/airquality\/<\/a><br>&nbsp; dustDensity = 0.17 * calcVoltage &#8211; 0.1;<br>&nbsp;<br>&nbsp; Serial.print(&#8220;Raw Signal Value (0-1023): &#8220;);<br>&nbsp; Serial.print(voMeasured);<br>&nbsp;<br>&nbsp; Serial.print(&#8221; &#8211; Voltage: &#8220;);<br>&nbsp; Serial.print(calcVoltage);<br>&nbsp;<br>&nbsp; Serial.print(&#8221; &#8211; Dust Density: &#8220;);<br>&nbsp; Serial.println(dustDensity);<br>&nbsp;<br>&nbsp; delay(1000);<br>} <\/p>\n<cite><br><\/cite><\/blockquote>\n\n\n\n<p> <strong>OUTPUT:<\/strong><br>NORMAL<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>20:41:58.934 -&gt; Raw Signal Value (0-1023): 180.00 &#8211; Voltage: 0.88 &#8211; Dust Density: 0.05<\/li>\n\n\n\n<li>20:41:59.950 -&gt; Raw Signal Value (0-1023): 190.00 &#8211; Voltage: 0.93 &#8211; Dust Density: 0.06<\/li>\n\n\n\n<li>20:42:00.967 -&gt; Raw Signal Value (0-1023): 175.00 &#8211; Voltage: 0.85 &#8211; Dust Density: 0.05<\/li>\n\n\n\n<li>20:42:01.981 -&gt; Raw Signal Value (0-1023): 182.00 &#8211; Voltage: 0.89 &#8211; Dust Density: 0.05<\/li>\n\n\n\n<li>20:42:02.996 -&gt; Raw Signal Value (0-1023): 175.00 &#8211; Voltage: 0.85 &#8211; Dust Density: 0.05<\/li>\n\n\n\n<li>20:42:04.009 -&gt; Raw Signal Value (0-1023): 174.00 &#8211; Voltage: 0.85 &#8211; Dust Density: 0.04<\/li>\n\n\n\n<li>20:42:05.025 -&gt; Raw Signal Value (0-1023): 173.00 &#8211; Voltage: 0.84 &#8211; Dust Density: 0.04<\/li>\n\n\n\n<li>20:42:06.036 -&gt; Raw Signal Value (0-1023): 162.00 &#8211; Voltage: 0.79 &#8211; Dust Density: 0.03<\/li>\n\n\n\n<li>20:42:07.081 -&gt; Raw Signal Value (0-1023): 176.00 &#8211; Voltage: 0.86 &#8211; Dust Density: 0.05<\/li>\n\n\n\n<li>20:42:08.096 -&gt; Raw Signal Value (0-1023): 170.00 &#8211; Voltage: 0.83 &#8211; Dust Density: 0.04<\/li>\n<\/ul>\n\n\n\n<p>As the voltage level fluctuates the dust density readings change accordingly. I burnt a small piece of paper to see if reading schange and they did.<\/p>\n\n\n\n<p><br><strong>MAXIMUM VALUE&nbsp; <\/strong><\/p>\n\n\n\n<p>To get maximum values, I inserted a piece of rolled paper to block the sensor. Voltage readings jump to their maximum value, 3.69 volts and output dust reading is 0.53 at it&#8217;s maximum corresponding value.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>20:43:33.582 -&gt; Raw Signal Value (0-1023): 755.00 &#8211; Voltage: 3.69 &#8211; Dust Density: 0.53<\/li>\n\n\n\n<li>20:43:34.598 -&gt; Raw Signal Value (0-1023): 756.00 &#8211; Voltage: 3.69 &#8211; Dust Density: 0.53<\/li>\n\n\n\n<li>20:43:35.645 -&gt; Raw Signal Value (0-1023): 755.00 &#8211; Voltage: 3.69 &#8211; Dust Density: 0.53<\/li>\n\n\n\n<li>20:43:36.659 -&gt; Raw Signal Value (0-1023): 755.00 &#8211; Voltage: 3.69 &#8211; Dust Density: 0.53<\/li>\n\n\n\n<li>20:43:37.673 -&gt; Raw Signal Value (0-1023): 755.00 &#8211; Voltage: 3.69 &#8211; Dust Density: 0.53<\/li>\n\n\n\n<li>20:43:38.688 -&gt; Raw Signal Value (0-1023): 756.00 &#8211; Voltage: 3.69 &#8211; Dust Density: 0.53<\/li>\n\n\n\n<li>20:43:39.704 -&gt; Raw Signal Value (0-1023): 755.00 &#8211; Voltage: 3.69 &#8211; Dust Density: 0.53 <\/li>\n<\/ul>\n\n\n\n<p><br><br><\/p>\n\n\n\n<p><strong>MQ135 Pollution Sensor Configuration<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li> Vcc &#8211; To 5 V<\/li>\n\n\n\n<li>GND &#8211;&nbsp; To Ground<\/li>\n\n\n\n<li>A &#8211; To A1<\/li>\n\n\n\n<li>D &#8211;  Not connected <\/li>\n<\/ul>\n\n\n\n<p><strong>CODE<\/strong>: <\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p> <br>int sensorValue;<br>int digitalValue;<br>void setup()<br>{<br><br>Serial.begin(9600); \/\/ sets the serial port to 9600<br>}<br>void loop()<br>{<br>sensorValue = analogRead(1); \/\/ read analog input pin 1<br>Serial.println(sensorValue, DEC); \/\/ prints the value read<br>Serial.println(digitalValue, DEC);<br>delay(1000); \/\/ wait 100ms for next reading<br>} <\/p>\n<cite><br><\/cite><\/blockquote>\n\n\n\n<p> OUTPUT<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>22:40:14.593 -&gt; 105<\/li>\n\n\n\n<li>22:40:14.593 -&gt; 1<\/li>\n\n\n\n<li>22:40:15.608 -&gt; 105<\/li>\n\n\n\n<li>22:40:15.608 -&gt; 1<\/li>\n\n\n\n<li>22:40:16.589 -&gt; 105<\/li>\n\n\n\n<li>22:40:16.589 -&gt; 1<\/li>\n\n\n\n<li>22:40:17.607 -&gt; 104<\/li>\n\n\n\n<li>22:40:17.607 -&gt; 1<\/li>\n\n\n\n<li>22:40:18.589 -&gt; 104 <\/li>\n<\/ul>\n\n\n\n<p><strong>RESULTS:<\/strong><\/p>\n\n\n\n<p>By themselves, both sensors work fine. The readings seem to be consistent with environmental conditions and change with changing level of pollutants like smoke.<\/p>\n\n\n\n<p><strong>TO BE DONE:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Attach a LCD screen and output the reading directly to it without use of PC.<\/li>\n\n\n\n<li>Adding and configuring a WiFi module to upload data to an online monitoring application.<\/li>\n<\/ol>\n\n\n\n<p><strong>PROBLEMS TO BE SOLVED:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>There is a noticeable change in readings if both sensors are used  at same time. Arduino doesn&#8217;t seem to be able to supply same amount of voltage to multiple components. It will affect readings adversely when more components like LCD screen are added. Perhaps use of a separate power source, like a powered USB hub supplying 5 V will help.<\/li>\n\n\n\n<li>I don&#8217;t know of any way to properly calibrate the sensors. These are just the raw readings and may not be entirely accurate. I have not figured out a way to address this issue yet.<\/li>\n<\/ol>\n\n\n\n<p>More in next post.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I had an Arduino kit lying around for a long time but never did anything with it. Few days back I bought a few sensors and started to build a pollution sensor system consisting of atleast two sensors for now and multiple ways of monitoring. I don&#8217;t know any programing and most of the code&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[330],"tags":[430],"class_list":["post-2079","post","type-post","status-publish","format-standard","hentry","category-technology","tag-projects"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Arduino Project : Pollution Sensor System, initial setup. - \u0905\u0930\u0947 \u092f\u093e\u092f\u093e\u0935\u0930 \u0930\u0939\u0947\u0917\u093e \u092f\u093e\u0926?<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jjamwal.in\/yayavar\/adruino-project-pollution-sensor-system-initial-setup\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Arduino Project : Pollution Sensor System, initial setup. - \u0905\u0930\u0947 \u092f\u093e\u092f\u093e\u0935\u0930 \u0930\u0939\u0947\u0917\u093e \u092f\u093e\u0926?\" \/>\n<meta property=\"og:description\" content=\"I had an Arduino kit lying around for a long time but never did anything with it. 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\u0905\u0930\u0947 \u092f\u093e\u092f\u093e\u0935\u0930 \u0930\u0939\u0947\u0917\u093e \u092f\u093e\u0926?","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/jjamwal.in\/yayavar\/adruino-project-pollution-sensor-system-initial-setup\/","og_locale":"en_US","og_type":"article","og_title":"Arduino Project : Pollution Sensor System, initial setup. - \u0905\u0930\u0947 \u092f\u093e\u092f\u093e\u0935\u0930 \u0930\u0939\u0947\u0917\u093e \u092f\u093e\u0926?","og_description":"I had an Arduino kit lying around for a long time but never did anything with it. Few days back I bought a few sensors and started to build a pollution sensor system consisting of atleast two sensors for now and multiple ways of monitoring. 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