mqtt php tutorial
<?php
require('vendor/autoload.php');
use \PhpMqtt\Client\MqttClient;
use \PhpMqtt\Client\ConnectionSettings;
$server = 'broker.emqx.io';
$port = 1883;
$clientId = rand(5, 15);
$username = 'emqx_user';
$password = null;
$clean_session = false;
$connectionSettings = new ConnectionSettings();
$connectionSettings
->setUsername($username)
->setPassword(null)
->setKeepAliveInterval(60)
->setLastWillTopic('emqx/test/last-will')
->setLastWillMessage('client disconnect')
->setLastWillQualityOfService(1);
$mqtt = new MqttClient($server, $port, $clientId);
$mqtt->connect($connectionSettings, $clean_session);
printf("client connected\n");
$mqtt->subscribe('emqx/test', function ($topic, $message) {
printf("Received message on topic [%s]: %s\n", $topic, $message);
}, 0);
for ($i = 0; $i< 10; $i++) {
$payload = array(
'protocol' => 'tcp',
'date' => date('Y-m-d H:i:s'),
'url' => 'https://github.com/emqx/MQTT-Client-Examples'
);
$mqtt->publish(
// topic
'emqx/test',
// payload
json_encode($payload),
// qos
0,
// retain
true
);
printf("msg $i send\n");
sleep(1);
}
$mqtt->loop(true);