watchdog - how to send (any) data to serial port (com1)

I want to make a hardware watchdog. I need to send any data to serial port every 5 minutes. (for example “a” or “i’m in alive” :slight_smile: ) It is possible at script?

as far as I know, no…
I asked same thing, about 1 year ago, but answer was no…

thanks
(hm good support… )
Then any way to send (any) data?

configure a ppp-dialout port that sends an INIT string. enable and disable it using scheduler ?

Sam

good idea, I will try it!
Thanks