Android Question MQTT inline wait for code

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Hamied Abou Hulaikah

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Why this is not working?
B4X: 
' code ....
Wait For mqttclient_MessageArrived(Topic As String, Payload() As Byte)  
' rest of code ....
I can't go to rest of code after publishing and should receiving msg!
 
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DonManfred

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Hamied Abou Hulaikah said:
Why this is not working?
Click to expand...
because mqttclient_MessageArrived is not a resumeable sub. It is an Eventsub.
Resumeable subs only have ONE Returnvalue.

[B4X] Resumable subs that return values (ResumableSub)

Remember that that a call to Sleep or Wait For in a resumable sub causes the code flow to return to the parent. Example: Sub Button1_Click Sum(1, 2) Log("after sum") End Sub Sub Sum(a As Int, b As Int) Sleep(100) 'this will cause the code flow to return to the parent Log(a + b) End Sub...
www.b4x.com
 
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teddybear

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As DonManfred said, mqttclient_MessageArrived is an eventsub, you need not to wait for it, when message arrived, it will been called. the example has been explained very clear
 
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Hamied Abou Hulaikah

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Oh sorry, After analysing the situation, the inline wait for code is working fine, why my code not worked? because wait for line will be waiting for any publish occurred.
Where is my mistake? I was want to put publish and wait for in same code block.
I tested it by running other publish code, the wait for inline code fired normally.

Thanks
 
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Sagenut

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The mqttclient_MessageArrived event does return a value normally?
I don't know mqtt, this is why I am asking.
 
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Sagenut

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Checking the forum I found this
B4X: 
Private Sub mqtt_MessageArrived (Topic As String, Payload() As Byte)
 
End Sub
so the sub receive 2 parameters but return nothing.
Maybe try
B4X: 
' code ....
Wait For mqttcomplete(Topic As String, Payload() As Byte) 
' rest of code ....
B4X: 
Private Sub mqtt_MessageArrived (Topic As String, Payload() As Byte)

CallSub3(Me, "mqttcomplete", Topic, Payload)

End Sub
Untested code, wrote from mobile.
 
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