net.TCPSocket in HC3

[747 18]

Hi all,

 

Im trying to port the implementation i had in HC2 to HC3 regarding a TCPSocket i use to get data from a Solar inverter.

 

I can get it working by only using 1 write/read but when i try to do write/read using a set of commands, it all gets messed up which i think is because of the asynchronous write/read..

 

Any suggestion how to solve this?

 

Basically, i need to send one command, wait for the response and in "OnDataReceived" function handle it and after that is done, iterate through the next list of commands, etc.

 

BR

[rraptorr 4]

I've recently did something similar on HC3 when integrating with my AC unit. Usually such problems are due to poor implementation of the receiving side, not HC3. When you send multiple commands at once they can be sent in a single TCP packet. Properly programmed receiving side should handle such situation, but with simple devices it is often not the case.

 

To solve this problem, I've ensure that there is only one command sent over the network at once. If the code wants to send more commands, then they are queued until response is received.

 

The code is on GitHub here: 

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In particular, function sendCommand is here: 

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When it sends first command it sets a flag, waitingForResponse, which causes subsequent commands to be put in a queue

When a response is received, the flag is cleared and next command from the queue is sent, if any. That part is here: 

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End result is the code just uses sendCommand function and doesn't have to bother with anything else. Only one command is on the flight which makes the receiving device happy.

Edited November 24, 2025 by rraptorr

[747 18]

Thanks rraptorr!
 

It sounds like its exactly how i want it to behave.

Ill have a look at your code, thanks again!

 

BR