@ian Belated thanks for your comments. Did you ever get an answer to your question “If anyone can point to instructions on how to “run a script that periodically sends command to OpenSprinkler” I’d be grateful.” in your reply to me above?
I see and understand the syntax HTTP GET command for changing the percentage. My question is, how do you actually send this command to the firmware to affect a change. I’d like to park such a command in a cron job(s) to send a percentage update at various times of year. But, what is the sytax in the cron job OUTSIDE of the command itself. EG, it seems like a URL is needed, maybe aport. Perhaps there needs to be a command to set a temp userid.