[casetta] What is communication check character ?

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Hi guys,
If I have a cfx and a computer connected by RS232, assume I want to send data from the cfx to the computer.
  1. computer is on receiving mode and waits for data
  2. cfx sends "\34"
  3. cfx waits for confirmation
  4. computer sends a character c ou some string
  5. cfx sends all the data
Do you know the character c mentionned in the 4th step ?


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