Created
August 6, 2021 19:11
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simple example for mqtt over websocket
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>mqtt</title> | |
| <script type="text/javascript" src="https://unpkg.com/mqtt/dist/mqtt.min.js"></script> | |
| </head> | |
| <body> | |
| <div> | |
| <input type="text" id="in"> <button onclick="send()">send</button> | |
| <ul id="msgs"></ul> | |
| </div> | |
| </body> | |
| </html> | |
| <script type="text/javascript"> | |
| function onConnect() | |
| { | |
| console.log('connection successfull') | |
| } | |
| async function onMessage(topic, msg) | |
| { | |
| let msgStr = msg.toString() | |
| msgs.innerHTML += `<li>${topic}: ${msgStr}</li>` | |
| } | |
| var client = mqtt.connect('wss://linux.vm:7130') | |
| client.on('connect', onConnect) | |
| client.on('message', onMessage) | |
| client.subscribe('test/#') //can take function as second argument which recive error | |
| client.publish('test/ws', 'hello from browser') | |
| let msgs = document.getElementById('msgs') | |
| let input = document.getElementById('in') | |
| function send() | |
| { | |
| client.publish('test/ws', input.value) | |
| input.value = '' | |
| } | |
| </script> |
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