Key
CMD = Remote command
ANS = Response to remote command
tc = command time. This depends on the number of characters,
on the number of bits per character and on the baud rate.
Ex.: XB<CR>; with 3 characters, 8N1, 9600 therefore tc = 3.3ms
trr = response delay time. It is always less than or equal to 2 characters.
Ex.: with 2 characters, 8N1, 9600 therefore trr <= 2.2ms
tr = response time. This depends on the number of characters of the response.
Ex.: if the response to XB<CR> is a string or 16 characters, 8N1, 9600 therefore tr = 17.6ms
ta = wait time between end of response and start of next command.
The time must be made up of at least two characters.
Ex.: with 2 characters, 8N1, 9600 therefore ta >= 2.2ms