Difference between revisions of "Breath Analyser"
| Line 34: | Line 34: | ||
==References and Credits== | ==References and Credits== | ||
| − | * | + | * http://educ8s.tv/breathanalyzer/AlcoholTester.ino |
{{DISQUS}} | {{DISQUS}} | ||
Revision as of 12:11, 14 October 2015
Guru (talk) 11:27, 14 October 2015 (IST)
Contents
[hide]Components/Boards Used
| 1 | Explore One for Arduino | 
|
| 2 | OLED Display Module 128X64 | 
|
| 3 | Alcohol Gas Sensor (MQ3) board | 
|
| 4 | Mini Breadboard | 
|
| 5 | [ 3 cell Battery Holder] | 
|
Arduino code for Breath Analyser
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| #include <DHT.h> | |
| #include <Wire.h> | |
| #include <ESP8266WiFi.h> | |
| #include "font.h" | |
| #define offset 0x00 // SDD1306 // offset=0 for SSD1306 controller | |
| //#define offset 0x02 // SH1106 // offset=2 for SH1106 controller | |
| #define OLED_address 0x3c | |
| String apiKey = "things_speak_api_key"; | |
| char ssid[20] = "wifi ssid"; | |
| char password[20] = "wifi password"; | |
| char TempValue[15]; | |
| String str; | |
| const char* server = "api.thingspeak.com"; | |
| #define DHTPIN 5 // what pin we're connected to | |
| DHT dht(DHTPIN, DHT11,15); | |
| WiFiClient client; | |
| void setup() { | |
| Serial.begin(115200); // for debugging | |
| Wire.begin(0,2); // Initialize I2C and OLED Display | |
| init_OLED(); | |
| reset_display(); | |
| clear_display(); | |
| delay(10); | |
| sendStrXY("Connecting to ",0,0); | |
| sendStrXY(ssid, 3, 0); | |
| // Setup the Internet | |
| WiFi.begin(ssid, password); | |
| int pos = 0; | |
| while (WiFi.status() != WL_CONNECTED) { | |
| delay(500); | |
| pos++; | |
| sendStrXY(".", 5, pos); | |
| } | |
| sendStrXY("connected", 5, 0); | |
| clear_display(); | |
| delay(100); | |
| //Setup the display Screen | |
| sendStrXY("Explore Embedded" ,0,0); | |
| sendStrXY("Temp:",3,0); | |
| sendStrXY("Humidity:",4,0); | |
| sendStrXY("InternetOfThings",7,0); | |
| } | |
| //String TempValue; | |
| void loop() { | |
| float h = dht.readHumidity(); | |
| float t = dht.readTemperature(); | |
| char tvalue[5], hvalue[5]; | |
| if (isnan(h) || isnan(t)) { | |
| Serial.println("Failed to read from DHT sensor!"); | |
| return; | |
| } | |
| str = String(t); | |
| str.toCharArray(tvalue,15); | |
| sendStrXY(tvalue,3,10); | |
| str = String(h); | |
| str.toCharArray(hvalue,15); | |
| sendStrXY(hvalue,4,10); | |
| if (client.connect(server,80)) { // "184.106.153.149" or api.thingspeak.com | |
| String postStr = apiKey; | |
| postStr +="&field1="; | |
| postStr += String(t); | |
| postStr +="&field2="; | |
| postStr += String(h); | |
| postStr += "\r\n\r\n"; | |
| client.print("POST /update HTTP/1.1\n"); | |
| client.print("Host: api.thingspeak.com\n"); | |
| client.print("Connection: close\n"); | |
| client.print("X-THINGSPEAKAPIKEY: "+apiKey+"\n"); | |
| client.print("Content-Type: application/x-www-form-urlencoded\n"); | |
| client.print("Content-Length: "); | |
| client.print(postStr.length()); | |
| client.print("\n\n"); | |
| client.print(postStr); | |
| Serial.print("Temperature: "); | |
| Serial.print(t); | |
| Serial.print(" degrees Celcius Humidity: "); | |
| Serial.print(h); | |
| Serial.println("% send to Thingspeak"); | |
| } | |
| client.stop(); | |
| Serial.println("Waiting..."); | |
| // thingspeak needs minimum 15 sec delay between updates | |
| delay(20000); | |
| } |
Downloads
- Complete Arduino code
References and Credits