I use the uart for communicating with other devices.
The device sends a few bytes to the wismo quick 2400 modem and the modem answers with a few response bytes. It is very important for us that the response is in 10 msec.
Now I wrote a very simple program that echoes every byte I send to the modem. I tried it with different baud rates and got the following results:
Time between tx and rx byte
115200 baud 500 usec
1200 baud 35 msec
We must use 1200 baud because the device talks only at that baudrate.
But the response time is much to long.
And now the question: Why differs the response time at different baud rates??