The Licor 7500 at 2m has not been reporting for a while.
Looking at /proc/tty/driver/serial for port 2 indicates that no characters have been received since the last reboot. As of Jul 18 the system uptime is 19 days.
Did "rs 2" to talk to the port. After sending carriage a return the 7500 responds with
^M(Error (Received TRUE))\n
So, it is alive and responding, just not sending data. Sent it a configuration command, setting the BW and RS232 parameters, which got it going again:
(Outputs (BW 10) (RS232 (Freq 10.0) (Baud 9600)))
It responded with the following and then started streaming data:
(Ack (Received TRUE)(Val 0))
Looks like it didn't come up in continuous reporting mode for some reason - either after a power outage, or after receiving some glitch characters on its input.
There may be a better command to get it going again once it has been interrupted.
I just knew from prior experience that the above works. Probably just a "(Outputs)" or
"(Outputs (BW 10))" would also work.