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Question: how to write RAW data to tcp socket with QA LUA


Joep
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Hello, I found a project who reverse engineered the Wi-Fi protocol from the Mertik controller connected to my fireplace. Yeay! ?

 

With the following (simplified) NodeJS code I can send the standby command to my fireplace:
 

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I know how to open a socket in HC3 QA but I don't get how to convert the message to a RAW buffer.
The JavaScript line does it with Buffer.from(prefix + msg, 'hex');
 

Does some LUA god know how to convert the message in QA LUA for the HC3? 

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13 hours ago, Joep said:

Hello, I found a project who reverse engineered the Wi-Fi protocol from the Mertik controller connected to my fireplace. Yeay! ?

 

With the following (simplified) NodeJS code I can send the standby command to my fireplace:
 

Please login or register to see this code.

 

I know how to open a socket in HC3 QA but I don't get how to convert the message to a RAW buffer.
The JavaScript line does it with Buffer.from(prefix + msg, 'hex');
 

Does some LUA god know how to convert the message in QA LUA for the HC3? 

5 bucks! :D 

 

ocal hostname = "192.168.1.1"

    local port = 2000

 

    local tcpSocket = Net.FTcpSocket(hostname, port)

    wr, err = tcpSocket:write(
      string.char(0x21, 0x89, 0x01, 0x50, 0x57, 0x31, 0x0A)
    );

 

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Edited by 10der
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  • Inquirer
  • Thank you very much! (gives 5 bucks) :)

     

    But the msg is variable, I have to input different values for different settings.

    The problem is how to convert it in LUA to your local buf = representation.

     

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    Like this?

    Please login or register to see this code.

    Edited by jgab
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  • Inquirer
  • @10der and @jgab thank you very much for your help! This works! Now I can create a QA for my fireplace.

     

    I also got this tip this morning which works also:
     

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    @10der: where are you on Discord? :)
     

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    25 minutes ago, Joep said:

    Discord

    well, I take offense :D 

    (joke, I am was busy with doing my current fintech project)

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