Hi,

I noticed that UART timeout_char is not working. Regardless of the value of this parameter, UART always waits for around 8x the time of a character to identify that communication has ended.
With the help of a forum contributor, we were able to locate and fix the problem.
In the machine_uart.c we add the following command to line 208:

uart_set_rx_timeout(self->uart_num, self->timeout_char);

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Now that code snippet looked like this:

// set timeout_char
// make sure it is at least as long as a whole character (13 bits to be safe)
self->timeout_char = args[ARG_timeout_char].u_int;
uint32_t min_timeout_char = 13000 / baudrate + 1;
if (self->timeout_char < min_timeout_char) {
    self->timeout_char = min_timeout_char;
}
uart_set_rx_timeout(self->uart_num, self->timeout_char);

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I don't know if timeouts have been disabled for a specific reason, but I would like to report that this minor fix resolves the issue, at least for timeout_char.