30.Aug.2023
Request from Mcu as "iot.milivolt.com.tr/receive_data.php?deg1=xx°2=yy"
It is processed by the Web Server.
Description of receive_data.php file:
The file is written in PHP to retrieve data, insert it into the database, and return notification messages during operations.
The $servername, $username, $password, and $dbname variables contain information required to access the database.
The $_GET superglobal array receives data sent by HTTP GET request (deg1 and deg2).
A connection to the database is created with the new mysqli() function. If a connection error occurs, the die() function displays the error message and the process is terminated.
Data is added to the database with theINSERT INTO SQL statement. The $sql variable contains this SQL statement.
$conn->query($sql)===TRUEif the query was run successfully "Data was added successfully." message is displayed, otherwise error details are given with the error message.
The database connection is closed with the ->close() method.
This PHP file is used to save incoming temperature and humidity data to a database. When the request is made, this file adds data to the database and returns the result of the operation.
file content of receive_data.php:
<?php
// Database information
$servername="localhost"; // Server name or IP address
$username="milivoltcomtr_iot"; // Database username
$password="123456789"; // Database user password
$dbname="milivoltcomtr_iot"; // Database name
// Get incoming data with GET request
$deg1=$_GET['deg1']; // Initial data (temperature)
$deg2=$_GET['deg2']; // Second data (moisture)
// Create database connection
$conn=new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("Database connection error: " . $conn->connect_error);
}
// Add the data to the database
$sql="INSERT INTO dht (temp, humd) VALUES ('$deg1', '$deg2')";
if ($conn->query($sql)===TRUE) {
echo "Data successfully added."; // Return this message if data was added successfully
} else {
echo "Error adding data: " . $conn->error; // Return error message if error occurred
}
$conn->close(); // Close the database connection
?>
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