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SoftwareSerial sim(10, 11); int led1 = 7; int led2 = 8; int led3 = 9; int gas = A0; int coi = 12; const int DHTPIN = 4; Arduino // !"c d# li$u t% DHT11 & chân m'ch const int DHTTYPE = DHT11; DHT11 DHT22 //Khai báo lo'i c(m bi)n, có lo'i DHT dht(DHTPIN, DHTTYPE); String val; int _timeout; String _buffer; String number = "+84852880426"; void setup() { delay(7000); //delay for seconds to make sure the modules get the signal Serial.begin(9600); _buffer.reserve(50); Serial.println("Sistem Started "); pinMode(led1, OUTPUT); pinMode(led2, OUTPUT); pinMode(led3, OUTPUT); xx https://documents-downloader.pages.dev/document 48/53 23:30 06/06/2023 Documents Downloader pinMode(coi, OUTPUT); pinMode(gas, INPUT); dht.begin(); sim.begin(9600); delay(1000); delay(100); sim.println("AT"); sim.println("AT+CMGF=1"); sim.println("AT+CNMI=1,2,0,0,0"); lcd.init(); lcd.backlight(); } void nhietgas() { lcd.clear(); int t = dht.readTemperature(); int data = analogRead(gas); lcd.setCursor(0, 0); lcd.print("KHI GAS: "); lcd.setCursor(11, 0); int data2 = map(data, 270, 1024, 0, 100); if (data2 < 0) { data2 = 0; } lcd.print(data2); lcd.setCursor(14, 0); lcd.print("%"); lcd.setCursor(0, 1); lcd.print("NHIET DO: "); lcd.setCursor(11, 1); lcd.print(t); lcd.setCursor(14, 1); lcd.print("*C"); delay(100); if (t > 50 || data2 > 50) { xz https://documents-downloader.pages.dev/document 49/53 23:30 06/06/2023 Documents Downloader lcd.clear(); lcd.setCursor(0, 1); lcd.print("CANH BAO CHAY"); digitalWrite(coi, HIGH); SendMessage(); delay(10000); digitalWrite(coi, LOW); } } void SendMessage() { //Serial.println ("Sending Message"); sim.println("AT+CMGF=1"); //Sets the GSM Module in Text Mode delay(1000); //Serial.println ("Set SMS Number"); sim.println("AT+CMGS=\"" number to send message + number + "\"\r"); //Mobile phone delay(1000); String SMS = "canh bao chay"; sim.println(SMS); delay(100); sim.println((char)26);// ASCII code of CTRL+Z delay(1000); _buffer = _readSerial(); } String _readSerial() { _timeout = 0; while (!sim.available() && _timeout < 12000 ) { delay(13); _timeout++; } if (sim.available()) { return sim.readString(); xP https://documents-downloader.pages.dev/document 50/53 23:30 06/06/2023 Documents Downloader } } void loop() { nhietgas(); if (Serial.available()) { sim.write(Serial.read()); } if (sim.available() > 0) { val = sim.readStringUntil('\n'); Serial.println(val); if (val == "On1\r") { digitalWrite(led1, HIGH); phanhoi(1); Serial.println("LED1 ON"); lcd.clear(); lcd.setCursor(0, 1); lcd.print("thiet bi bat"); delay(3000); lcd.clear(); } if (val == "Off1\r") { digitalWrite(led1, LOW); phanhoi(0); Serial.println("LED1 OFF"); lcd.clear(); lcd.setCursor(0, 1); lcd.print("thiet bi tat"); delay(3000); lcd.clear(); } if (val == "On2\r") { digitalWrite(led2, HIGH); xM https://documents-downloader.pages.dev/document 51/53 23:30 06/06/2023 Documents Downloader phanhoi(1); Serial.println("LED2 ON"); lcd.clear(); lcd.setCursor(0, 1); lcd.print("thiet bi bat"); delay(3000); lcd.clear(); } if (val == "Off2\r") { digitalWrite(led2, LOW); phanhoi(0); Serial.println("LED2 OFF"); lcd.clear(); lcd.setCursor(0, 1); lcd.print("thiet bi tat"); delay(3000); lcd.clear(); } if (val == "On3\r") { digitalWrite(led3, HIGH); phanhoi(1); Serial.println("LED3 ON"); lcd.clear(); lcd.setCursor(0, 1); lcd.print("thiet bi bat"); delay(3000); lcd.clear(); } if (val == "Off3\r") { digitalWrite(led3, LOW); phanhoi(0); Serial.println("LED3 OFF"); lcd.clear(); x https://documents-downloader.pages.dev/document 52/53 23:30 06/06/2023 Documents Downloader lcd.setCursor(0, 1); lcd.print("thiet bi tat"); delay(3000); lcd.clear(); } } } void phanhoi(bool tipe) { sim.println("AT+CMGF=1"); delay(1000); sim.println("AT+CMGS=\"+84853773338\"\r"); // s* c+a m'ch b,t t-t delay(1000); if (tipe == 1) { sim.println("LED ON"); } else { sim.println("LED OFF"); } delay(100); sim.println((char)26); delay(1000); } x° https://documents-downloader.pages.dev/document 53/53