Question: Is there any possibility to program a TCP client on Teletask to connect to a third-party system on port 23 and implement a protocol-specific communication to this device?
If you just want to send some byte trough a socket, you probably can use therefore the AV-SOFT license.
You can create an AV-IP device, with properties 'Source' (no amplifier!)
Then you can enter some codes:
You can define in total 20 codes (if you create a device with multiple sources you can create multiple times 20 codes)
Afterwards, you can use these codes in a Local Mood.
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