How to write programme use javascirpt with continuous command


I am using TCP Request to send an receive the message to/ from anybus bolt.
whatevey use telnet ,At command of anybus and putty,I can write multiline command then send them to the anybus bolt and receive correct data.

I want to know ,which string("\r\n","\n" is not ok) should i add between multiline command like picture.

Is the delay time used in the "TCP request" ?
in order to get the string of 71 length,it need more than 200ms ,it is too long .
→ send message :"ATBGCRC=0,19,0\r\n"
→receive message:

circle time of timestamp is 200ms

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