Android Question MQTT B4A

[fernando.oliboni]

Hi,

Hello, I used ESP32 to publish a topic to an MQTT broker. I would like to use B4A to subscribe to the publication. Could anyone give an example? Thank you

 

[kisoft]

What MQTT broker? Do you have your own server?, Do you want to use ready-made solutions ... Use a search engine, type ESP8266...

 

[josejad]

This library is compatible with B4A

[B4X] jMQTT - Official MQTT client

Implementation of MQTT client based on the Paho open source project: http://www.eclipse.org/paho/ See this tutorial for more information: https://www.b4x.com/android/forum/threads/iot-mqtt-protocol.59471/ jMQTT v1.26+ is compatible with B4J and B4A (older versions weren't compatible with B4A)...

www.b4x.com

 

[fernando.oliboni]

[QUOTE = "kisoft, postagem: 775883, membro: 97798"]
Qual corretor MQTT? Você tem seu próprio servidor ?, Quer usar soluções prontas ... Use um mecanismo de busca, digite ESP8266 ...
[/CITAR]


I searched the forum and found iMQTT, but I couldn't use it completely because I don't know how to use the MQTT_MessageArrived function.

 

[fernando.oliboni]

This library is compatible with B4A

[B4X] jMQTT - Official MQTT client

Implementation of MQTT client based on the Paho open source project: http://www.eclipse.org/paho/ See this tutorial for more information: https://www.b4x.com/android/forum/threads/iot-mqtt-protocol.59471/ jMQTT v1.26+ is compatible with B4J and B4A (older versions weren't compatible with B4A)...

www.b4x.com

I found jMQTT but I couldn't use it completely because I don't know how to use the MQTT_MessageArrived function.

 

[josejad]

Sub Process_Globals
    Public client As MqttClient
End Sub

Sub ConnectMQTT
    Log("Connecting")
    client.Initialize("client", "tcp://your_server:your_port", "your_topic")
'    client.Connect  ***If you don't need user and password, then uncomment this line and comment the 3 next ones
    Dim options As MqttConnectOptions
    options.Initialize("your_user", "your_password")
    client.Connect2(options)
End Sub

Private Sub client_MessageArrived (Topic As String, Payload() As Byte)
    Dim obj As Object = serializator.ConvertBytesToObject(Payload)
    Dim msg As String = obj
    Log("Topic: " & Topic  & " Mensaje: " & msg)
End Sub