The timer panel's source code lives here: https://github.com/dylan-thinnes/hacklab-timers

To add new timers or reset an existing timer, make a request of the form http://bus-timetable-pi.hacklab:3456/reset?name=MyNewTimerName&timestamp=MyTime. The allowed options for timestamp are “now”, “never”, and a unix timestamp with the number of seconds since the Unix epoch.

Alternatively, publish a timer name to time-since-last/reset and it will be set to the current time.

To remove a timer, make a request of the form http://bus-timetable-pi.hacklab:3456/delete?name=MyNewTimerName

To get the history of all edits to the timers, make a request of the form http://bus-timetable-pi.hacklab:3456/history