Wahyu CF: Kirim data dari arduino ke webserver

Kirim data dari arduino ke webserver


#include <EEPROM.h>
//#include <Ethernet.h> //Uno Mega
#include <UIPEthernet.h> //Nano

/** the current address in the EEPROM (i.e. which byte we're going to write to next) **/
int address = 0;
byte value;

int ledPin = 13;  // LED connected to digital pin 13
int inPin = 7;    // pushbutton connected to digital pin 7
int val = HIGH;      // variable to store the read value
int valOld = HIGH;
String inputString = "";         // a String to hold incoming data
bool stringComplete = false;  // whether the string is complete

int incomingByte = 0; // for incoming serial data
int LANcon = 0;
int LANPrint = 0;
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[] = { 169, 254, 222, 40 }; //assigned arduino LAN IP address
byte server[] = { 169, 254, 222, 37 }; // laptop running apache LAN IP address
EthernetClient client; //apache web server running on port 80

void setup()
{
  pinMode(inPin, INPUT_PULLUP);
  pinMode(ledPin, OUTPUT);  // sets the digital pin 13 as output
  inputString.reserve(200);
  Ethernet.begin(mac, ip);
  Serial.begin(9600);
  Serial.println("starting simple arduino client test");
  Serial.println();
  value = EEPROM.read(address);
  Serial.println("");
  Serial.print("Hardware ID: ");
  Serial.print(value);
  Serial.println();
  Serial.println("999 -> Hardware ID");
  Serial.println("  0 -> test RESET");
  Serial.println("  1 -> test SET");
  Serial.println(" >1 -> set Hardware ID");
  Serial.println("");
  Serial.println();
  delay(1000);
  Serial.println("connecting...");
  if (client.connect(server, 80)) {
    Serial.println("connected");
    Serial.println("");
    client.println("GET /ardu/data.php?id=" + String(value) + "&st=2 HTTP/1.0"); //php page invoking my web service
    client.println();
    LANcon = 1;
  } else {
    Serial.println("connection failed");
  }
}
void TombolEvent(int st) {
  Serial.print("Send to server st= ");
  Serial.println(st);
  if (client.connect(server, 80)) {
    Serial.println("connected");
    Serial.println("");
    client.println("GET /ardu/data.php?id=" + String(value) + "&st=" + String(st) + " HTTP/1.0"); //php page invoking my web service
    client.println();
    LANcon = 1;
  } else {
    Serial.println("connection failed");
  }
}
void loop()
{
  val = digitalRead(inPin);
  digitalWrite(ledPin, val);
  if (valOld != val) {
    if (val == LOW) {
      Serial.print("Tombol ");
      Serial.print(value);
      Serial.println(" -> SET!");
      TombolEvent(1);
      valOld = val;
    } else if (val == HIGH) {
      Serial.print("Tombol ");
      Serial.print(value);
      Serial.println(" -> RESET!");
      TombolEvent(0);
      valOld = val;
    }
    delay(500);
  }
  if (stringComplete) {
    Serial.print("inputString: ");
    Serial.print(inputString.toInt());
    if (inputString.toInt() == 999) {
      Serial.println(" Mem Read");
      value = EEPROM.read(address);
      Serial.print("Hardware ID: ");
      Serial.println(value);
      Serial.println("");
    } else if (inputString.toInt() > 1) {
      Serial.println(" Mem Update");
      for (int i = 0 ; i < EEPROM.length() ; i++) {
        EEPROM.write(i, 0);
      }
      delay(100);
      Serial.println("Mem clear");
      int val = inputString.toInt();
      EEPROM.write(address, val);
      delay (100);
      value = EEPROM.read(address);
      Serial.print("Update Hardware ID to: ");
      Serial.println(value);
      Serial.println("");
    }
    if (inputString.toInt() == 1) {
      Serial.println("");
      Serial.println("Serial -> SET!");
      TombolEvent(1);
    } else if (inputString.toInt() == 0) {
      Serial.println("");
      Serial.println("Serial -> RESET!");
      TombolEvent(0);
    }
    stringComplete = false;
    inputString = "";
  }
  if (client.available() && LANcon == 1) {
    char c = client.read();
  }
  if (!client.connected() && LANcon == 1) {
    Serial.println("disconnecting.");
    Serial.println("");
    client.stop();
    LANcon = 0;
  }
}
void serialEvent() {
  while (Serial.available()) {
    char inChar = (char)Serial.read();
    inputString += inChar;
    if (inChar == '\n') {
      stringComplete = true;
    }
  }
}

Libraries

#include <SPI.h>
#include <EEPROM.h>
#include <UIPEthernet.h>

SPI.h: Digunakan untuk komunikasi SPI.
EEPROM.h: Digunakan untuk membaca dan menulis pada EEPROM.
UIPEthernet.h: Digunakan untuk menghubungkan dan berkomunikasi melalui Ethernet untuk Arduino Nano.

Variables

int address = 0;
byte value;

int ledPin = 13;
int inPin = 7;
int val = HIGH;
int valOld = HIGH;

String inputString = "";
bool stringComplete = false;

int incomingByte = 0;
int LANcon = 0;
int LANPrint = 0;

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[] = { 169, 254, 222, 40 };
byte server[] = { 169, 254, 222, 37 };
EthernetClient client;

address: Alamat EEPROM yang sedang diakses.
value: Nilai yang dibaca dari atau ditulis ke EEPROM.
ledPin: Pin untuk LED.
inPin: Pin untuk tombol input.
val dan valOld: Nilai saat ini dan sebelumnya dari tombol input.
inputString: String untuk menyimpan data serial yang masuk.
stringComplete: Menandakan apakah string yang masuk telah lengkap.
incomingByte, LANcon, LANPrint: Variabel tambahan untuk pengelolaan data.
mac, ip, server: Alamat MAC dan IP untuk koneksi Ethernet.
client: Objek untuk mengelola koneksi Ethernet.

Setup Function

void setup() {
  pinMode(inPin, INPUT_PULLUP);
  pinMode(ledPin, OUTPUT);
  inputString.reserve(200);

  Ethernet.begin(mac, ip);
  Serial.begin(9600);
  Serial.println("starting simple arduino client test");
  value = EEPROM.read(address);
  Serial.println("");
  Serial.print("Hardware ID: ");
  Serial.print(value);
  Serial.println();
  Serial.println("999 -> Hardware ID");
  Serial.println("  0 -> test RESET");
  Serial.println("  1 -> test SET");
  Serial.println(" >1 -> set Hardware ID");
  Serial.println("");
  delay(1000);

  Serial.println("connecting...");

  if (client.connect(server, 80)) {
    Serial.println("connected");
    Serial.println("");
    client.println("GET /ardu/data.php?id=" + String(value) + "&st=2 HTTP/1.0");
    client.println();
    LANcon = 1;
  } else {
    Serial.println("connection failed");
  }
}

Mengatur pin mode dan memulai koneksi Ethernet dan Serial.
Membaca nilai dari EEPROM dan menampilkannya.
Mencoba menghubungkan ke server dan mengirimkan permintaan HTTP GET.

TombolEvent Function

void TombolEvent(int st) {
  Serial.print("Send to server st= ");
  Serial.println(st);
  if (client.connect(server, 80)) {
    Serial.println("connected");
    Serial.println("");
    client.println("GET /ardu/data.php?id=" + String(value) + "&st=" + String(st) + " HTTP/1.0");
    client.println();
    LANcon = 1;
  } else {
    Serial.println("connection failed");
  }
}

Fungsi untuk mengirimkan status tombol ke server.

Loop Function

void loop() {
  val = digitalRead(inPin);
  digitalWrite(ledPin, val);
  if (valOld != val) {
    if (val == LOW) {
      Serial.print("Tombol ");
      Serial.print(value);
      Serial.println(" -> SET!");
      TombolEvent(1);
      valOld = val;
    } else if (val == HIGH) {
      Serial.print("Tombol ");
      Serial.print(value);
      Serial.println(" -> RESET!");
      TombolEvent(0);
      valOld = val;
    }
    delay(500);
  }
  if (stringComplete) {
    Serial.print("inputString: ");
    Serial.print(inputString.toInt());
    if (inputString.toInt() == 999) {
      Serial.println(" Mem Read");
      value = EEPROM.read(address);
      Serial.print("Hardware ID: ");
      Serial.println(value);
      Serial.println("");
    } else if (inputString.toInt() > 1) {
      Serial.println(" Mem Update");
      for (int i = 0 ; i < EEPROM.length() ; i++) {
        EEPROM.write(i, 0);
      }
      delay(100);
      Serial.println("Mem clear");
      int val = inputString.toInt();
      EEPROM.write(address, val);
      delay (100);
      value = EEPROM.read(address);
      Serial.print("Update Hardware ID to: ");
      Serial.println(value);
      Serial.println("");
    }

    if (inputString.toInt() == 1) {
      Serial.println("");
      Serial.println("Serial -> SET!");
      TombolEvent(1);
    } else if (inputString.toInt() == 0) {
      Serial.println("");
      Serial.println("Serial -> RESET!");
      TombolEvent(0);
    }

    stringComplete = false;
    inputString = "";
  }

  if (client.available() && LANcon == 1) {
    char c = client.read();
  }

  if (!client.connected() && LANcon == 1) {
    Serial.println("disconnecting.");
    Serial.println("");
    client.stop();
    LANcon = 0;
  }
}

Memeriksa status tombol dan mengirimkan status ke server jika berubah.
Menangani input serial untuk membaca atau memperbarui nilai EEPROM.
Memeriksa koneksi ke server dan menutup koneksi jika tidak terhubung.

SerialEvent Function

void serialEvent() {
  while (Serial.available()) {
    char inChar = (char)Serial.read();
    inputString += inChar;
    if (inChar == '\n') {
      stringComplete = true;
    }
  }
}

Mengumpulkan data dari Serial hingga menemukan karakter newline ('\n'), lalu menandai string lengkap.

Kesimpulan

Skrip ini berfungsi untuk:

Membaca dan menulis nilai pada EEPROM.
Menghubungkan ke server melalui Ethernet dan mengirimkan data berdasarkan status tombol.
Menangani input serial untuk mengontrol perangkat secara manual.

Terima kasih