How to use PHP and LoRa protocol for remote IoT communication

How to use PHP and LoRa protocol for remote IoT communication

Introduction:
With the development of IoT technology, remote communication has become a very important need. LoRaWAN (Long Range Wide Area Network) protocol is a wireless communication protocol designed for long-distance communication. It can achieve low power consumption and long-term communication. This article will introduce how to use PHP language and LoRa protocol for remote IoT communication.

1. Overview
Before we start, we need to have some basic understanding. PHP is a popular server-side scripting language for web development. LoRaWAN is a long-range communication protocol that implements low-power, long-distance communication based on LoRa technology. We will use PHP language to write server-side code to achieve communication with IoT devices.

2. Install the LoRaWAN kit
First, we need to install the required LoRaWAN kit. Execute the following command in the terminal window:

sudo apt-get update
sudo apt-get install lora_gateway
sudo apt-get install loraserver

3. Configure LoRaWAN server
Use the following command in the terminal to edit the lora-gateway-bridge configuration file:

sudo nano /etc/lora-gateway-bridge/lora-gateway-bridge.toml

Modify in the configuration file The following parameters:

#绑定到抽象地址上(选项需要根据实际网关进行修改)
bind="udp://0.0.0.0:1700"

#无网关连接地址时，发送消息的代理消息路由器网址
backend.mqtt.server="tcp://iot.eclipse.org:1883"

#MQTT代理的用户名和密码
backend.mqtt.username=""
backend.mqtt.password=""

Use the following command in the terminal to edit the loraserver configuration file:

sudo nano /etc/loraserver/loraserver.toml

Modify the following parameters:

#MQTT代理的用户名和密码
application_server.integration.mqtt.username=""
application_server.integration.mqtt.password=""

4. Write PHP code
Create a name The PHP file for lora.php. In this file, we will use the MQTT client library to connect and publish messages to the MQTT broker.

<?php
require("phpMQTT.php");

$server = "tcp://iot.eclipse.org";
$port = 1883;
$username = ""; //MQTT代理的用户名（如果有的话）
$password = ""; //MQTT代理的密码（如果有的话）
$client_id = "php_lora_server"; //客户端ID（任意指定）

$mqtt = new phpMQTT($server, $port, $client_id);

if ($mqtt->connect(true, NULL, $username, $password)) {
    $topic = "lora/data"; //主题（自定义）
    $message = "Hello from LoRa"; //要发布的消息（自定义）
    $mqtt->publish($topic, $message, 0);
    echo "Message published.";
    $mqtt->close();
} else {
    echo "Failed to connect to MQTT broker.";
}
?>

5. Testing and Debugging
Execute the following command in the terminal to execute the PHP file:

php lora.php

If everything is normal, you will see the output of "Message published."

6. Summary
Through this article, we learned how to use PHP language and LoRa protocol for remote IoT communication. We install the LoRaWAN package, configure the LoRaWAN server, and use PHP code to publish messages to the MQTT broker. I hope this article can provide some help for you to understand and use PHP and LoRa protocol for remote IoT communication.

Reference source:

• https://github.com/bluerhinos/phpMQTT

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