I have to talk to a network attached physical terminal where people register their working hours with RFID chips.
The IP is 192.168.XXX.16 Port 10001.

The Protocol expects these ASCII control chars:

Char	DEC	HEX	Description
<STX>	002	02	Start of Telegram
<SOH>	001	01	Start of Answer (Ethernet)
<ETX>	003	03	End of Data Bloc
<EOT>	004	04	End of Telegram
<ENQ>	005	05	Data available
<ACK>	006	06	Command understood
<NAK>	021	15	Command not understood

To get me startet I need to send these values to the terminal:

<ATX>H<EOT>

Control-Char-STX + Command-char "H" as string + Control-Char-EOT

How do I send this mixture of control chars and strings?
The terminal should send an answer like this:

<STX>XTM20<EOT>

Control-Char-STX + id+version 20 + Control-Char-EOT
Any help would be appreciated.

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