[Nut-upsuser] APCsmart serial port problem

[Doug Parsons]

Detected Smart-UPS 2200 RM [JS0704019003] on /dev/ttyS0
update_status: ser_send_char failed: Input/output error
dstate_init: sock /var/state/ups/myups open on fd 5
smartmode: ser_send_char failed: Input/output error
Communications with UPS lost - check cabling
smartmode: ser_send_char failed: Input/output error
Communications with UPS lost - check cabling
smartmode: ser_send_char failed: Input/output error
Communications with UPS lost - check cabling
smartmode: ser_send_char failed: Input/output error
Communications with UPS lost - check cabling
smartmode: ser_send_char failed: Input/output error
^C

Okay, now this is getting beyond my realm of knowledge. It almost looks as
if it doesn't want to talk smart. There is some communication in that it get
the UPS model. Hopefully someone else on the list may have some insight.

Doug