Mendeteksi Kekeruhan Air Menggunakan Mikrokontroler Arduino Nano Dengan Sensor Light Dependent Resistor (LDR) Dan Light Emittin Gdioda (LED) Super Bright Berbasis Komunikasi Data Online

A-1

LAMPIRAN

#include
#define TIMEOUT
#define LED

5000
6

//NO TELPON 082167527652
//NO AXIS 083199013494
//085206012927

int pertama,kedua,ketiga;
float num,NTU;

char cstr[222];
String str,gabung;

//Variable to hold last line of serial output from
SIM800
char currentLine[500] = "";
int currentLineIndex = 0;

//Boolean to be set to true if message notificaion was
found and next
//line of serial output is the actual SMS message content
bool nextLineIsMessage = false;
GPRS gprs;//Untuk Sim800l

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A-2

void urut(){//Fungsi Sorting pembacaan nilai sensor
if(analogRead(A5)>analogRead(A6)){
if(analogRead(A6)>analogRead(A7)){

pertama=analogRead(A5);kedua=analogRead(A6);ketiga=analog

Read(A7);
}
else{
if(analogRead(A5)>analogRead(A7)){

pertama=analogRead(A5);kedua=analogRead(A7);ketiga=analog
Read(A6);
}
else{

pertama=analogRead(A7);kedua=analogRead(A5);ketiga=analog
Read(A6);
}
}
}
else{
if(analogRead(A6)>analogRead(A7)){
if(analogRead(A5)>analogRead(A7)){

pertama=analogRead(A6);kedua=analogRead(A5);ketiga=analog

Read(A7);
}else{

pertama=analogRead(A6);kedua=analogRead(A7);ketiga=analog
Read(A5);

Universitas Sumatera Utara

A-3

}
}
else{
if(analogRead(A7)>analogRead(A5)){

if(analogRead(A5)>analogRead(A6)){

pertama=analogRead(A7);kedua=analogRead(A5);ketiga=analog
Read(A6);
}else{

pertama=analogRead(A7);kedua=analogRead(A6);ketiga=analog
Read(A5);
}
}
}
}
NTU=(13.746*kedua) - 6034.4;
}

void setup() {
pinMode (LED , OUTPUT);
Serial.begin(9600);
digitalWrite (LED, HIGH);
while(!Serial);
Serial.println("Starting SIM800 Auto Read SMS");
gprs.preInit();
delay(1000);
while(0 != gprs.init()) {

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A-4

delay(1000);
Serial.print("init error\r\n");
}
//Set SMS mode to ASCII
if(0 != gprs.sendCmdAndWaitForResp("AT+CMGF=1\r\n",
"OK", TIMEOUT)) {
ERROR("ERROR:CNMI");
return;
}
//Start listening to New SMS Message Indications
if(0 !=
gprs.sendCmdAndWaitForResp("AT+CNMI=1,2,0,0,0\r\n", "OK",
TIMEOUT)) {
ERROR("ERROR:CNMI");
return;
}

Serial.println("Inisialisasi Sim800l berhasil");
//gprs.sendSMS ("083199013494","Inisialisasi selesai");
gprs.sendSMS ("082299929228","Inisialisasi selesai");
//Untuk indikator Led inisialisasi sim800l
digitalWrite(LED,0);
delay(500);
digitalWrite(LED,1);
delay(1000);
digitalWrite(LED,0);
delay(1);
}
void loop() {

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A-5

int waktu=millis() / 1000;//millis per 1000 berarti
perdetik
if (waktu%30==1){//setiap 30 detik mengirim sms

notifikasi
urut();
num = NTU;
str = String(num);
String a="Nilai Baca Kekeruhan airnya: ";
gabung=a + num;
str = String(gabung);
Serial.print(str);
str.toCharArray(cstr,333);
Serial.println(cstr);
gprs.sendSMS ("082299929228",cstr);
digitalWrite(LED,0);
delay(500);
digitalWrite(LED,1);
delay(1000);
digitalWrite(LED,0);
delay(1);
}
urut();
Serial.print(waktu);Serial.print("

");Serial.println(NTU);

||

delay(1000);
//If there is serial output from SIM800// Pesan masuk
if(gprs.serialSIM800.available()){

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A-6

char lastCharRead =
gprs.serialSIM800.read();
//Read each character from serial output
until \r or \n is reached (which denotes end of line)
if(lastCharRead == '\r' || lastCharRead
== '\n'){
String lastLine =
String(currentLine);

//If last line read +CMT, New SMS
Message Indications was received.
//Hence, next line is the message
content.
if(lastLine.startsWith("+CMT:")){
Serial.println(lastLine);
nextLineIsMessage = true;
} else if (lastLine.length() > 0) {
if(nextLineIsMessage) {
Serial.println(lastLine);
// ########## MEMBACA KONTEN SMS DAN MENCARI+MENGARTIKAN
KONTEN SMS KE PROGRAM #########
//Tampilkan rata" jika menerima pesan Data
if(lastLine.indexOf("Data") >= 0){
urut();
num = NTU;
str = String(num);
String a="Nilai Baca Kekeruhan airnya: ";
gabung=a + num;
str = String(gabung);

Serial.print(str);

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A-7

str.toCharArray(cstr,333);
Serial.println(cstr);
gprs.sendSMS
("082299929228",cstr);
digitalWrite(LED,1);
delay(1000);
digitalWrite(LED,0);
delay(500);
digitalWrite(LED,1);
delay(500);
digitalWrite(LED,0);
delay(1);
}
nextLineIsMessage = false;

}
}
//Clear char array for next line of read

sizeof(currentLine);

for( int i = 0; i <
++i ) {
currentLine[i] = (char)0;

}
currentLineIndex = 0;
} else {
currentLine[currentLineIndex++] =
astCharRead;
}

}

}

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Universitas Sumatera Utara

A-8

LAMPIRAN
HASIL UJI COBA SENSOR MENGGUNAKAN SAMPEL AIR
JENIS AIR
NO WAKTU

AIR AQUA BIDES
SENSOR SENSOR SENSOR
1
2
3

AIR PDAM
SENSOR SENSOR SENSOR
1
2
3

AIR MINUM AQUA
SENSOR SENSOR SENSOR
1
2
3

AIR SANGAT KERUH
SENSOR SENSOR SENSOR
1
2
3

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Universitas Sumatera Utara

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