Unacceptable protocol version mqtt v3

[willin]

events.js:182
      throw er; // Unhandled 'error' event
      ^

Error: Connection refused: Unacceptable protocol version
    at MqttClient._handleConnack (/Users/willin/Desktop/未命名文件夹/node_modules/mqtt/lib/client.js:791:15)
    at MqttClient._handlePacket (/Users/willin/Desktop/未命名文件夹/node_modules/mqtt/lib/client.js:307:12)
    at process (/Users/willin/Desktop/未命名文件夹/node_modules/mqtt/lib/client.js:249:12)
    at Writable.writable._write (/Users/willin/Desktop/未命名文件夹/node_modules/mqtt/lib/client.js:259:5)
    at doWrite (/Users/willin/Desktop/未命名文件夹/node_modules/readable-stream/lib/_stream_writable.js:406:64)
    at writeOrBuffer (/Users/willin/Desktop/未命名文件夹/node_modules/readable-stream/lib/_stream_writable.js:395:5)
    at Writable.write (/Users/willin/Desktop/未命名文件夹/node_modules/readable-stream/lib/_stream_writable.js:322:11)
    at TLSSocket.ondata (_stream_readable.js:628:20)
    at emitOne (events.js:115:13)
    at TLSSocket.emit (events.js:210:7)

const client = mqtt.connect('ssl://xxx.azure-devices.cn:8883', {
  username: 'xxx',
  password: 'xxx',
  clientId: 'xxx',
  protocolId: 'MQTT',
  protocolVersion: 3,
  will: {
    topic: 'xxx',
    payload: 'disconnected will',
    qos: 1,
    retain: true
  }
});

[mcollina]

I think protocolVersion should be 4 for Azure.

[willin]

Unhandled rejection AmqpError
    at Connection.<anonymous> (/Users/willin/Documents/dwing/AirHub/node_modules/amqp10/lib/amqp_client.js:182:23)
    at emitOne (events.js:115:13)
    at Connection.emit (events.js:210:7)
    at Connection._terminate (/Users/willin/Documents/dwing/AirHub/node_modules/amqp10/lib/connection.js:551:8)
    at Connection._processError (/Users/willin/Documents/dwing/AirHub/node_modules/amqp10/lib/connection.js:351:8)
    at Object.errorHandler (/Users/willin/Documents/dwing/AirHub/node_modules/amqp10/lib/connection.js:282:43)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:203:67)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)

Unhandled rejection AmqpError
    at Connection.<anonymous> (/Users/willin/Documents/dwing/AirHub/node_modules/amqp10/lib/amqp_client.js:182:23)
    at emitOne (events.js:115:13)
    at Connection.emit (events.js:210:7)
    at Connection._terminate (/Users/willin/Documents/dwing/AirHub/node_modules/amqp10/lib/connection.js:551:8)
    at Connection._processError (/Users/willin/Documents/dwing/AirHub/node_modules/amqp10/lib/connection.js:351:8)
    at Object.errorHandler (/Users/willin/Documents/dwing/AirHub/node_modules/amqp10/lib/connection.js:282:43)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:203:67)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)
    at Object.event (/Users/willin/Documents/dwing/AirHub/node_modules/stately.js/Stately.js:190:52)

when 4

[mcollina]

Nothing in those stacktrace shows MQTT.js, or am I reading them wrong?

[wijamw]

I have same error but different description events.js:182 throw er; // Unhandled 'error' event ^

Error: read ECONNRESET at exports._errnoException (util.js:1022:11) at TLSWrap.onread (net.js:610:25)

This is my code from example that have been provided. Then I changed it to localhost.

var mqtt = require('mqtt') var client = mqtt.connect('mqtts://127.0.0.1:1883') client.on('connect', function () { client.subscribe('presence') client.publish('presence', 'Hello mqtt') }) client.on('message', function (topic, message) { // message is Buffer console.log(message.toString()) client.end() })

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