That should be a warning, not an error.
You can get rid of that by using Functions$Function0<Boolean> in the arguments to the lambda.
Add logging to your rules to verify that they are triggering it not. If not, what ever event the roles the to trigger is not happening or the trigger is not working.
Add logging to your lambdas to see if they are being executed and where they are failing.
Will do when I get back home!
All,
it took some time, but to save others from debugging the same snippet, please find included my working version of these rules, items en widget.
I translated them to English.
At least, the debugging of the snippets learned me a lot about working with lambda’s and groups 
Full code is attached, here parts of it:
Group gAlarm (gPersistme)
//Alarm Monday
Switch PERSON1_ALARM_MON "ALARM Monday" <clock> (gAlarm)
Number PERSON1_ALARM_MON_H "Alarm start Monday Hour [%s]" <calendar> (gAlarm)
Number PERSON1_ALARM_MON_M "Alarm start Monday Minutes [%s]" <calendar> (gAlarm)
Number PERSON1_ALARM_MON_RUN "ALARM Monday Duration [%s]" <clock>
<../..>
****************************
import org.eclipse.xtext.xbase.lib.Functions
import java.util.Map
var Map<String, Timer> timers = newHashMap
val Functions$Function4
<String, Map<String, Timer>, Functions$Function0<Boolean> , Functions$Function0<Boolean> , Boolean>
processAlarm = [person, timers, alarmStart, alarmStop |
var dayTempName="NA"
switch now.getDayOfWeek()
{
case 1: dayTempName = "MON"
case 2: dayTempName = "TUE"
case 3: dayTempName = "WED"
case 4: dayTempName = "THU"
case 5: dayTempName = "FRI"
case 6: dayTempName = "SAT"
case 7: dayTempName = "SUN"
}
val dayName=dayTempName
val myPerson = gAlarm.members.filter[ s | s.name == person+dayName ].head.state
if(myPerson == ON)
{
val startMinutes = (gAlarm.members.filter[ s | s.name == person+dayName+"_M" ].head.state as Number).intValue
val startHour = (gAlarm.members.filter[ s | s.name == person+dayName+"_H" ].head.state as Number).intValue
val runTime = (gAlarm.members.filter[ s | s.name == person+dayName+"_RUN" ].head.state as Number).intValue
if(startMinutes == now.getMinuteOfHour && startHour == now.getHourOfDay)
{
sendCommand(person+"ACTIVE", "ON")
// alarmStart is a passed in lambda that implements the stuff to do for that person's alarm
alarmStart.apply()
timers.put(person, createTimer(now.plusMinutes(runTime), [|
// alarmStop is a passed in lambda that implements the stuff to do at the end of that person's alarm
alarmStop.apply()
sendCommand(person+"ACTIVE", "OFF")
timers.put(person, null)
]))
}
}
true
]
//===================================================================================
rule "Alarms"
when
Time cron "0 0/1 * * * ?"
then
val Functions$Function0 <Boolean> person1Start = [|
logInfo("Alarms", "alarm start code")// alarm start code
true
]
val Functions$Function0 <Boolean> person1Stop = [|
logInfo("Alarms", "alarm stop code")// alarm stop code
true
]
// define functions for each person, if there is nothing to do for that person you can use [| true]
// as illustrated with person2 below.
processAlarm.apply("PERSON1_ALARM_", timers, person1Start, person1Stop)
// processAlarm.apply("Ellen", timers, [| true], [| true]) // PERSON2 has nothing to do when the alarm starts and ends so we pass empty lambdas
end
rule "init"
when
System started
then
logInfo("init alarm", "Initialise alarm items if needed")
gAlarm.members.filter[ i | i.type.toString == "Switch" ].forEach[ s |
if (s.state.toString == "NULL")
{
s.postUpdate(OFF)
}
]
gAlarm.members.filter[ i | i.type.toString == "Number" ].forEach[ s |
if (s.state.toString == "NULL")
{
s.postUpdate(0)
}
]
end
I hope this is helpful for others.
brgds,
Raf
Alarm.widget.json (2.9 KB)
scheduler.items.txt (2.8 KB)
scheduler.rules.txt (2.9 KB)
A bit has changed in the more than year since the last post and there are some minor improvements.
Don’t import the Functions. It is already imported for you.
If you don’t care about the return value, use a Procedures instead.
A better way to define a lambda is
val processAlarm = [String person, Map<String, Timer>, Procedures$Procedure0 alarmStart, Procedures$Prpocedure0 alarmStop |
...
]
Use a filter before your forEach to exclude the NULLs.
gAlarm.members.filter[ i | instanceof SwitchItem && i.state != NULL ].forEach[ s | s.postUpdate(OFF) ]
Thanks for posting!
This has been really useful - I have it as my alarm clock now
I have conacated the H/M variables to a time variable to display in the basic UI
However what I haven’t managed to do is to pass that time and date to another item that displays tomorrow’s alarm time
eg - using above variables
if i=(now.getDayOfWeek) Person1_Alarm_Tomorrow=("Person1_Alarm"+TheDay+"_T")
Where Person1_Alarm_Tomorrow is the display item and _T is the time string used to display the label on the frame
What I want is a simple item to display tomorrows alarm time on a habpanel
Maybe I’m making too complicated using rules based approach
Trigger a rule once a day and on any change to any one of the alarm Items. Midnight is probably a good choice.
Get the current day. val today = now.getDayOfWeek
Get tomorrow. val tomorrow = (today + 1) % 7
Convert the number for tomorrow to the characters representation. I recommend using a .map file and the transform Action. val tomorrowStr = transform("MAP", "alarm.map", tomorrow.toString)
Now we can pull the parts of the alarm out from the gPerson1Wecker Group by name.
Person1_Alarm_Tomorrow.postUpdate(gPerson1Wecker.members.findFirst("Person1_Alarm_"+tomorrowStr+"_T"))
Note the use of postUpdate.
Rule ‘update Tommorows Alarm’: An error occurred during the script execution: Could not invoke method: org.eclipse.xtext.xbase.lib.IterableExtensions.findFirst(java.lang.Iterable,org.eclipse.xtext.xbase.lib.Functions$Function1) on instance: null
is what I get with
rule "update Tommorows Alarm"
when
Member of gPerson1Alarm changed
then
val today = now.getDayOfWeek
val tomorrow = (today + 1) % 7
val tomorrowStr = transform("MAP", "alarm.map", tomorrow.toString)
Person1_Alarm_Tomorrow.postUpdate(gPerson1Alarm.members.findFirst("Person1_Alarm_"+tomorrowStr+"_T"))
end
alarm.map
default=NA
1=Mo
2=Tu
3=We
4=Th
5=Fr
6=Sa
7=Su
in Items
String Person1_Alarm_Tomorrow "Tomorrow [%s]" <none> (gPerson1Alarm)
Make sure gPerson1Alarm exactly matches the Group definition.
Try this syntax for findFirst.
Person1_Alarm_Tomorrow.postUpdate(gPerson1Alarm.members.findFirst[ a | a. name == “Person1_Alarm_”+tomorrowStr+"_T"]. state)
Yup that’s works - Thank you
I’ve also taken Person1_Alarm_Tomorrow out of the group gPerson1Alarm…hadn’t considered that changing the former would trigger the rule also!
Oddly I copied and pasted and it didn’t work as the quotation marks " were wrong - but sorted that
Is there a way to implement a limit in the widget so it doesn’t go below 0 or above 59 when setting the minutes? By default it is possible to set the alarm to “negative” minutes or beyond the end of the hour.
The sitemap version of the interface implements this, I just don’t know how to do this in the HABPanel version.
Hi
I’ve been looking for something like this for a while.
Thank you so much for your efforts 
To give a little back, I have added two rules to limit the hours and minutes.
I created two extra groups
Group gMinute
Group gHour
and assigned them to all the minutes and hour ITEMS like this
Group gAlarm (StartPersist) // Where "StartPersist" is the catch all for Peristance
Group gMinute
Group gHour
//Alarm Monday
Switch PERSON1_ALARM_MON "ALARM Monday" <clock> (gAlarm)
Number PERSON1_ALARM_MON_H "Alarm start Monday Hour [%s]" <calendar> (gAlarm,gHour)
Number PERSON1_ALARM_MON_M "Alarm start Monday Minutes [%s]" <calendar> (gAlarm,gMinute)
Number PERSON1_ALARM_MON_RUN "ALARM Monday Duration [%s]" <clock> (gAlarm)
//Alarm Tuesday
Switch PERSON1_ALARM_TUE "ALARM Tuesday" <clock> (gAlarm)
Number PERSON1_ALARM_TUE_H "Alarm start Tuesday Hour [%s]" <calendar> (gAlarm,gHour)
Number PERSON1_ALARM_TUE_M "Alarm start Tuesday Minutes [%s]" <calendar> (gAlarm,gMinute)
Number PERSON1_ALARM_TUE_RUN "ALARM Tuesday Duration [%s]" <clock> (gAlarm)
//Alarm Wednesday
Switch PERSON1_ALARM_WED "ALARM Wednesday" <clock> (gAlarm)
Number PERSON1_ALARM_WED_H "Alarm start Wednesday Hour [%s]" <calendar> (gAlarm,gHour)
Number PERSON1_ALARM_WED_M "Alarm start Wednesday Minutes [%s]" <calendar> (gAlarm,gMinute)
Number PERSON1_ALARM_WED_RUN "ALARM Wednesday Duration [%s]" <clock> (gAlarm)
//Alarm Thursday
Switch PERSON1_ALARM_THU "ALARM Thursday" <clock> (gAlarm)
Number PERSON1_ALARM_THU_H "Alarm start Thursday Hour [%s]" <calendar> (gAlarm,gHour)
Number PERSON1_ALARM_THU_M "Alarm start Thursday Minutes [%s]" <calendar> (gAlarm,gMinute)
Number PERSON1_ALARM_THU_RUN "ALARM Thursday Duration [%s]" <clock> (gAlarm)
//Alarm Friday
Switch PERSON1_ALARM_FRI "ALARM Friday" <clock> (gAlarm)
Number PERSON1_ALARM_FRI_H "Alarm start Friday Hour [%s]" <calendar> (gAlarm,gHour)
Number PERSON1_ALARM_FRI_M "Alarm start Friday Minutes [%s]" <calendar> (gAlarm,gMinute)
Number PERSON1_ALARM_FRI_RUN "ALARM Friday Duration [%s]" <clock> (gAlarm)
//Alarm Saturday
Switch PERSON1_ALARM_SAT "ALARM Saturday" <clock> (gAlarm)
Number PERSON1_ALARM_SAT_H "Alarm start Saturday Hour [%s]" <calendar> (gAlarm,gHour)
Number PERSON1_ALARM_SAT_M "Alarm start Saturday Minutes [%s]" <calendar> (gAlarm,gMinute)
Number PERSON1_ALARM_SAT_RUN "ALARM Saturday Duration [%s]" <clock> (gAlarm)
//Alarm Sunday
Switch PERSON1_ALARM_SUN "ALARM Sunday" <clock> (gAlarm)
Number PERSON1_ALARM_SUN_H "Alarm start Sunday Hour [%s]" <calendar> (gAlarm,gHour)
Number PERSON1_ALARM_SUN_M "Alarm start Sunday Minutes [%s]" <calendar> (gAlarm,gMinute)
Number PERSON1_ALARM_SUN_RUN "ALARM Sunday Duration [%s]" <clock> (gAlarm)
Switch PERSON1_ALARM_ACTIVE "ALARM PERSON1 Active" (gAlarm)
Number PERSON1_ALARM_PRESETS "ALARM Preset Load" <calendar> (gAlarm)
then just added these two rules
rule "Confine Minute"
when
Member of gMinute changed
then
logInfo("Minute Limiting", "Minute Value of "+triggeringItem.name+" Currently "+triggeringItem.state)
if (triggeringItem.state > 59) {
postUpdate(triggeringItem.name,"0")
}
if (triggeringItem.state < 0) {
postUpdate(triggeringItem.name,"59")
}
end
rule "Confine Hour"
when
Member of gHour changed
then
logInfo("Hour Limiting", "Hour Value of "+triggeringItem.name+" Currently "+triggeringItem.state)
if (triggeringItem.state > 23) {
postUpdate(triggeringItem.name,"0")
}
if (triggeringItem.state < 0) {
postUpdate(triggeringItem.name,"23")
}
end
The only thing I need to work out now is how to change the colours of the Glypths
Update
I couldn’t get 14 of those widgets to fit within the Android Tablet screen in an elegant way, so I had to create a custom layout using SVG files.
Considering that I would compare my artistic skills to that of a feral infant, I’m quite happy with the result.
Since you are using HABPanel, I’m pretty sure someone had created a time picker widget that you could use to set a DateTime I tem and save a lot of these Rules. Then you just need a ride to run one a day to change the date to today.
Thanks Rich
I’ve tried the other two timeline schedulers and using this seems to be the nearest I can get to a perfect solution for a particular use case.
You remember we chatted about using Google Calendar… I suggested it and it wasn’t welcomed as well as I had hoped.
Hi
I’ve managed to tweak this widget to suit the Velbus alarm times,
it can be downloaded here
http:/ /www. mdar. co. uk /dl/ forum_assets/ Velbus_Alarm.widget.zip – Removed
It requires the following naming convention, Where “AlarmName” is the only variable that has to be set in the widget.
AlarmName_Enabled
AlarmName_Wake_H
AlarmName_Wake_M
AlarmName_BedTime_H
AlarmName_BedTime_M
Update 2020 Jan
The widget has evolved quite a bit, if anyone wants to try it, the zip file is here
http://www.mdar.co.uk/dl/openhab2/Velbus_Alarm_V2.widget.zip
This uses an extra Item named
AlarmName_Type - Which in Velbus has the states “Global” and “Local”
Update
The minute and hour constraint rule has been updated, thanks to Rossko
I was having a problem where the Widgets didn’t size nicely, so I’ve spent the morning adding two size options.
One for the Font & Glyphs, another for the IconSets
I’ve added the new widget to the Zip file
Have been using this for a while
Map
default=NA
1=Mo
2=Tu
3=We
4=Th
5=Fr
6=Sa
7=Su
rule "update Tommorows Alarm"
when
Member of gPerson1Alarm changed or
Time is noon
then
val today = now.getDayOfWeek
val tomorrow = (today + 1) % 7
val tomorrowStr = transform("MAP", "alarm.map", tomorrow.toString)
Person1_Alarm_Tomorrow.postUpdate(gPerson1Alarm.members.findFirst[ a | a. name == "Person1_Alarm_"+tomorrowStr+"_T"].state)
end
I now have a problem where by it is returning 0 for tomorrow and therefore not mapping correctly - returns an error as cant mapto 0
Try
val tomorrow = now.plusDays(1).getDayOfWeek
You can add a default to your MAP file
=unexpected day
That’s got it thanks - I was looking at the map file to see if I could chnage it - I will anyway even though not needed
Hi everybody,
Is there a modification to do in OH 3 ?
The widget work properly, the item is updated at each change but de
PERSON1_ALARM_ACTIVE
Don t switch on at the defined time ?
I use the second widget in english this one
Raf
Alarm.widget.json (2.9 KB)
scheduler.items.txt (2.8 KB)
Thank you for help
In case anyone is still using this. It needs to be updated for OH3 because of the way dates are handled in rules.
So instead of
now.getDayOfWeek
you use
now.getDayOfWeek.getValue.intValue
and for
now.getMinuteOfHour
now.getHourOfDay
use
ZonedDateTime.now.getMinute
ZonedDateTime.now.getHour