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IoT Based Air Quality Monitoring
Just Do Electronics
May 05, 2020
Circuit Diagram :-
Code :-
//Prateek //www.prateeks.in #include
#include
#include
#include "MQ135.h" #include
#include
#define SCREEN_WIDTH 128 #define SCREEN_HEIGHT 64 #define OLED_RESET -1 Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET); String apiKey = "3GXEV3B944KWTGQU"; const char* ssid = "justDo"; const char* password = "pratik123"; const char* server = "api.thingspeak.com"; WiFiClient client; void setup() { Serial.begin(115200); display.begin(SSD1306_SWITCHCAPVCC, 0x3C); display.clearDisplay(); delay(10); Serial.println("Connecting to "); Serial.println(ssid); display.clearDisplay(); display.setCursor(0,0); display.setTextSize(1); display.setTextColor(WHITE); display.println("Connecting to "); display.setTextSize(2); display.print(ssid); display.display(); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); display.clearDisplay(); display.setCursor(0,0); display.setTextSize(1); display.setTextColor(WHITE); display.print("WiFi connected"); display.display(); delay(4000); } void loop() { MQ135 gasSensor = MQ135(A0); float air_quality = gasSensor.getPPM(); Serial.print("Air Quality: "); Serial.print(air_quality); Serial.println(" PPM"); Serial.println(); display.clearDisplay(); display.setCursor(0,0); display.setTextSize(1); display.setTextColor(WHITE); display.println("Air Quality Index"); display.setCursor(0,20); display.setTextSize(2); display.setTextColor(WHITE); display.print(air_quality); display.setTextSize(1); display.setTextColor(WHITE); display.println(" PPM"); display.display(); if (client.connect(server, 80)) { String postStr = apiKey; postStr += "&field1="; postStr += String(air_quality); postStr += "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.println("Data Send to Thingspeak"); } client.stop(); Serial.println("Waiting..."); delay(2000); }
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