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WioLTE のプログラム
フォルダー構造
$ tree mqtt_buzzer/
mqtt_buzzer/
├── mqtt_buzzer.ino
├── setupLTE.ino
└── setup_mqtt.ino
mqtt_buzzer.ino
// ---------------------------------------------------------------
/*
mqtt_buzzer.ino
Aug/20/2021
*/
// ---------------------------------------------------------------
#include <WioLTEforArduino.h>
#include <WioLTEClient.h>
#include <PubSubClient.h>
#include <ArduinoJson.h>
#include <stdio.h>
#define MQTT_SERVER_HOST "example.com"
#define MQTT_SERVER_PORT (1883)
#define ID "WioLTE"
#define OUT_TOPIC "sample/imageTopic"
#define IN_TOPIC "sample/imageTopic"
#define BUZZER_PIN (WIOLTE_D38)
#define BUZZER_ON_TIME (100)
WioLTE Wio;
WioLTEClient WioClient(&Wio);
PubSubClient MqttClient;
int icount = 0;
// ---------------------------------------------------------------
void callback(char* topic, byte* payload, unsigned int length)
{
DynamicJsonDocument doc(1024);
SerialUSB.println("");
payload[length] = '\0';
String msg = String((char*) payload);
SerialUSB.println(msg);
deserializeJson(doc, msg);
const char* buzzer = doc["buzzer"];
if (strstr(buzzer,"on"))
{
char str_out[] = "*** callback *** on ***";
SerialUSB.println(str_out);
MqttClient.publish(OUT_TOPIC, str_out);
Wio.LedSetRGB(0, 1, 0);
digitalWrite(BUZZER_PIN, HIGH);
delay(BUZZER_ON_TIME);
digitalWrite(BUZZER_PIN, LOW);
}
else if (strstr(buzzer,"off"))
{
char str_out[] = "*** callback *** off ***";
SerialUSB.println(str_out);
MqttClient.publish(OUT_TOPIC, str_out);
Wio.LedSetRGB(1, 0, 0);
digitalWrite(BUZZER_PIN, LOW);
}
}
// ---------------------------------------------------------------
void setup()
{
setupLTE();
pinMode(BUZZER_PIN, OUTPUT);
setup_mqtt_proc();
Wio.LedSetRGB(1, 1, 1);
SerialUSB.println("*** Setup completed *** Aug/20/2021 PM 18:00 ***");
}
// ---------------------------------------------------------------
void loop()
{
DynamicJsonDocument doc(1024);
char data_json[128];
if ((icount % 500) == 0)
{
doc["icount"] = icount;
doc["uptime"] = millis() / 1000;
serializeJson(doc, data_json);
SerialUSB.println(data_json);
}
MqttClient.loop();
icount++;
}
// ---------------------------------------------------------------
setup_mqtt.ino
// ---------------------------------------------------------------
/*
setup_mqtt.ino
Aug/20/2021
*/
// ---------------------------------------------------------------
void setup_mqtt_proc()
{
SerialUSB.println("### Connecting to MQTT server \""MQTT_SERVER_HOST"\"");
MqttClient.setServer(MQTT_SERVER_HOST, MQTT_SERVER_PORT);
MqttClient.setCallback(callback);
MqttClient.setClient(WioClient);
if (!MqttClient.connect(ID))
{
SerialUSB.println("### ERROR! connect ###");
}
else
{
MqttClient.subscribe(IN_TOPIC);
SerialUSB.println("*** subscribe ***");
}
}
// ---------------------------------------------------------------
setupLTE.ino はこちら
UDP で温度と湿度を Harvest に送る
Web ページ
index.html
<!DOCTYPE html>
<html lang="ja">
<head>
<meta http-equiv="CONTENT-TYPE" content="text/html; charset=utf-8" />
<title>JavaScript MQTT WebSocket Example</title>
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/paho-mqtt/1.0.1/mqttws31.js"></script>
<script src="mqtt_buzzer.js"></script>
</head>
<body>
<div class="contents">
<blockquote>
<button id="on">on</button>
<button id="off">off</button>
</blockquote>
</div>
<hr />
<div id="outarea_aa">outarea_aa</div>
<div id="outarea_bb">outarea_bb</div>
<div id="outarea_cc">outarea_cc</div>
<div id="outarea_dd">outarea_dd</div>
<div id="outarea_ee">outarea_ee</div>
<div id="outarea_ff">outarea_ff</div>
<div id="outarea_gg">outarea_gg</div>
<div id="outarea_hh">outarea_hh</div>
<hr />
<br />
<blockquote>
Version: Aug/13/2021<br />
</blockquote>
</body>
</html>
mqtt_buzzer.js
// ---------------------------------------------------------------
// mqtt_publish.js
//
// Aug/13/2021
//
// ---------------------------------------------------------------
var mqtt;
const reconnectTimeout = 2000;
const host="example.com"
const topic = "sample/imageTopic"
const port=8080
// ---------------------------------------------------------------
jQuery (function ()
{
jQuery("#outarea_aa").text("*** mqtt_publish.js *** start ***")
MQTTconnect()
jQuery ("button").click (function ()
{
const buzzer = this.id
jQuery ("button").css ("color","black")
jQuery ("#" + this.id).css ("color","blue")
buzzer_send_proc(buzzer)
})
jQuery("#outarea_hh").text("*** mqtt_publish.js *** end ***")
})
// ---------------------------------------------------------------
function onFailure(message)
{
console.log("Connection Attempt to Host "+host+"Failed");
setTimeout(MQTTconnect, reconnectTimeout);
}
// ---------------------------------------------------------------
function onMessageArrived(msg)
{
var out_msg="Message received "+msg.payloadString+"<br>"
out_msg=out_msg+"Message received Topic "+msg.destinationName
console.log(out_msg)
const str_out = msg.payloadString
jQuery("#outarea_cc").text(str_out)
}
// ---------------------------------------------------------------
function onConnect()
{
// Once a connection has been made, make a subscription and send a message.
jQuery("#outarea_bb").text("*** Connected ***")
console.log("Connected ")
mqtt.subscribe(topic)
}
// ---------------------------------------------------------------
function MQTTconnect()
{
console.log("connecting to "+ host +" "+ port)
var x=Math.floor(Math.random() * 10000)
var cname="orderform-"+x
mqtt = new Paho.MQTT.Client(host,port,cname)
//document.write("connecting to "+ host)
var options = {
timeout: 3,
onSuccess: onConnect,
onFailure: onFailure,
}
mqtt.onMessageArrived = onMessageArrived
mqtt.connect(options) //connect
}
// ---------------------------------------------------------------
function buzzer_send_proc(buzzer)
{
jQuery("#outarea_dd").text("*** buzzer_send_proc *** " + buzzer)
var unit_aa = {}
unit_aa["buzzer"] = buzzer
const json_str = JSON.stringify(unit_aa)
message = new Paho.MQTT.Message(json_str)
message.destinationName = topic
message.retained=true
mqtt.send(message)
}
// ---------------------------------------------------------------