Monitor PTT/DCD status

[craigerl]

It's impossible to monitor a gpio output pin status with the new/robust libgpiod and gpiozero API's, and they have no intention of implementing this feature (which existed for years in the /sys/class/gpio filesystem that is now gone).

Direwatch (github.com/craigerl/direwatch) used to watch the DCD and PTT pins (via the missing /sys/class/gpio interface) to let the operator know when the device is receiving and transmitting, drawing the corresponding red and green circles on a little display.

Is there another way to get a near-real-time ptt/dcd status from direwolf? named pipe? port? other? via python?

curiously,
-craig

[dranch]

There is the "-d o" option to see the status of PTT and DCD via STDOUT. I suppose you could also wire your PTT GPIO pin to a 10k resistor and over to a different GPIO pin in read-mode and poll that.

[craigerl]

Thanks David, that may be the trick then, for those playing along at home, send PTT and DCD status to direwolf.ptt.log and send the unaltered log to direwolf.log . It might be a bit laggy, but it's better than the new GPIO.

direwolf -d t -d o -p -q d -t 0 -c /run/direwolf.tnc.conf |& tee >(grep --line-buffered -E '(DCD |PTT )' > direwolf.ptt.log) | (grep --line-buffered -E -v '(PTT|DCD)' > direwolf.log )

PTT 0 = 1
PTT 0 = 0
DCD 0 = 1
DCD 0 = 0
PTT 0 = 1
PTT 0 = 0
DCD 0 = 1
DCD 0 = 0
DCD 0 = 1
DCD 0 = 0

thanks,
-craig