I am using WP76XX for our project and the settings are as below
root@swi-mdm9x28-wp:~# echo -e “AT!MAPUART?\r” | microcom -t 2000 /dev/ttyAT
One energy meter is connected to this Port and communication over RS232.
One issue , I noticed is after close(tty) system call , see some data/special characters(junk) still on TX line in RS232 Probing.
Would like to know how to check Close() system call has really closed the port or is there any delay in Sierra to close the port. Basically how to debug