For some yet unknown reason, I am getting this alert 8 times! The alert then vanishes quite shortly after.

because it still sends an alert notification, with an empty payload

fire:“SHOW_ALERT”, (always)

The following would alert you of the next event every time the calendar sends a calendar_event notification:

	{
	  module: "MMM-NotificationTrigger",
	  config: {
		triggers:[
		  {
			trigger: "CALENDAR_EVENTS",
			fires: [
				{
					fire:"SHOW_ALERT",
					payload: (payload) => {
						var testMessage = "";
						var nextEvent = payload.find(event => event.startDate > moment().format("x"));
						testMessage = nextEvent.title + " " + moment(nextEvent.startDate, "x").format("HH:mm");
						return {
							type: "notification",
							title: "Next event:",
							message: testMessage
						} 
					},
				}
			],
		  },
		]
	  }	
	}, 

For some yet unknown reason, I am getting this alert 8 times! The alert then vanishes quite shortly after.

It is a good idea, but what I would do, no, WILL do, is implement a “Notification Alert Function” directly into the calendar module (or into MMM-CalendarExt, if you’re interested, @Sean).
I think that would be a better way of ontrolling the alert created from a calendar event appearing.

not making any progress… can’t get the time compare to work

let now = moment()
let end = now.add(15, "minutes")
let event_time=moment(event.startDate)
if(event_time.isAfter(now) && event_time.isBefore(end))

its 11:53, event starts at 12:00 and ends as 12:15

so 12:00.isAfter(11:53) should be true, but is false
and 12:00.isBefore(12:08), should be true,m but is false

all the questions we have been asking… title, time filter, number to show, …

can you please post the code?

Took me 10 seconds :smiling_face_with_sunglasses:
No, of course I was already working on it.

Seriously, I like the idea, that’s why I did a contribution.But you need to be more specific if you want to have the complete solution

This will most probably not work and needs to be de-bugged, but might be worth as a starting point. And I hope you get what I’m hinting at.

0: {title: "M L King Day", startDate: "1579500000000", endDate: "1579586400000", fullDayEvent: true, location: "United States", …}
1: {title: "Valentine's Day", startDate: "1581660000000", endDate: "1581746400000", fullDayEvent: true, location: "United States", …}
2: {title: "Presidents' Day", startDate: "1581919200000", endDate: "1582005600000", fullDayEvent: true, location: "United States", …}
3: {title: "Good Friday", startDate: "1586494800000", endDate: "1586581200000", fullDayEvent: true, location: "United States", …}
4: {title: "Easter Sunday", startDate: "1586667600000", endDate: "1586754000000", fullDayEvent: true, location: "United States", …}
5: {title: "Mother's Day", startDate: "1589086800000", endDate: "1589173200000", fullDayEvent: true, location: "United States", …}
6: {title: "Memorial Day", startDate: "1590382800000", endDate: "1590469200000", fullDayEvent: true, location: "United States", …}
7: {title: "Father's Day", startDate: "1592715600000", endDate: "1592802000000", fullDayEvent: true, location: "United States", …}
8: {title: "Independence Day Holiday", startDate: "1593752400000", endDate: "1593838800000", fullDayEvent: true, location: "United States", …}
9: {title: "Independence Day", startDate: "1593838800000", endDate: "1593925200000", fullDayEvent: true, location: "United States", …}

so the js would be

payload[0].title 

for the title (cal subject) of the 1st cal entry

I found this by using the developers window (ctrl-shift-i), selecting the ‘Sources’ tab,
expanding the modules entry, and then the calendar entry to get to calendar.js

then knowing it is a notification,(notificationreceived) i searched (ctrl-f) for ‘sendnotification’
I put a stop on that line, hit refesh(f5), and the web page starts over, and stops on that line, then use the mouse to hover over the eventlist variable name, and it expands to the data layout

Is that what you want?

upcoming calendar events

what does that mean? if I have 20 entries, u want 1 alert with 20 entries, or 20 alerts with 1 entry each?
or just today, or?

alert module is expecting a single line of text