Bonito Technical Manual
V2.4.0
25
Camera interfaces
3.
A terminal program without local echo displays
E=3E8
>
After the execution of the command has finished the command prompt character
>
is displayed again. If any error occurred, a question mark character
?
is sent
previous to the prompt character.
To query a parameter value, send the corresponding command letter followed by
the equality sign and a question mark character:
>s=?[CR]
If the intended action does not need any parameter it is also sufficient in most
cases – as a shortcut – to send the command letter only, directly followed by
[CR]
.
At the beginning of a command sequence it is good practice to check the serial
communication by sending a
[CR]
only to the camera and verify that the com-
mand prompt
>
is returned.
Note
There is an input buffer holding a few characters but no hard-
ware handshake. For that reason, a sequence of commands
should not be sent to the camera without awaiting the inter-
mediate input prompts. This is especially important for serial
command processing through user-developed software rou-
tines. Otherwise, the camera’s serial input buffer may over-
flow.
