Sync Event Setup Fails When Using POST api/schedule

Developer Experience Integrating with Xibo
1

Hello,

I’m trying to create a sync event through the API, but I’m having trouble getting it to work.
Specifically, I’m attempting to use POST api/schedule to create a sync event for Display IDs 58 and 20, assigning Layout IDs 15884 and 15840.
The API response looks successful, but the event does not appear in the CMS at all.

parameters：eventTypeId=9&syncGroupId=34&name=SyncSchedule_2026-12-04_2&fromDt=2026-12-04 00:00:00&toDt=2026-12-04 23:59:59&isPriority=1&displayOrder=0&dayPartId=1&maxPlaysPerHour=0&recurrenceType=&recurrenceDetail=&recurrenceRange=&reminder_type=1&reminder_option=1&reminder_isEmailHidden=0&geoLocation=&displayGroupIds=69&displayGroupIds=25&layoutId_58=15884&layoutId_20=15890&reminder_scheduleReminderId=&reminder_value=

These are the parameters I’m sending:

Has anyone experienced this issue or knows what might be wrong?
Any help would be greatly appreciated!

2

Hi Yasuo, thank you for your post and the details in your API call.

Can you confirm that you have created a sync group for your displays and set a lead display? Can you also confirm if you are scheduling your sync event to that sync group, not to the individual displays?

3

Thank you for your message and for checking.

Regarding your questions:

The sync group has already been created, and a lead display is correctly assigned.
The sync event is also scheduled to the sync group, not to individual displays.

However, the issue we are currently facing is the following:

When a sync event is created via the CMS UI, it is displayed and works correctly

When the same type of sync event is created via the API, it does not appear in the CMS

Based on this behavior, the sync group and lead display configuration itself seems to be correct.
We suspect the issue may be related to the API-based event creation process or specific parameters required when creating the event via the API.

Additionally, I am not sure if this is the appropriate place to ask, but we are also facing another issue related to synchronization.

When playback is synchronized, only the lead display experiences a delay.
More specifically:

The delay occurs only during the first loop of the playlist on the lead display

From the second loop onward, all displays play back in sync correctly

We are currently looking for a solution to this behavior as well.
If this is a known issue, or if there are recommended settings or points to verify, we would appreciate your guidance.

Thank you in advance for your support.

Best regards

4

Hi, yasuo_yamakita! Thank you for providing the additional details.

I went ahead to check the current behavior of the sync event creation via API. Could you please verify if the parameter values provided are correct?

eventTypeId=9&syncGroupId=2&name=SyncSchedule_2026-12-04_2&fromDt=2026-12-04 00:00:00&toDt=2026-12-04 23:59:59&isPriority=1&displayOrder=0&dayPartId=1&maxPlaysPerHour=0&recurrenceType=&recurrenceDetail=&recurrenceRange=&reminder_type=1&reminder_option=1&reminder_isEmailHidden=0&geoLocation=&displayGroupIds[]=2&displayGroupIds[]=3&layoutId_2=23&layoutId_3=28&reminder_scheduleReminderId=&reminder_value=

I was able to proceed with the creation of the schedule via API using the sample above. I suspect the issue may be related to one of the following:

  1. Incorrect user permission to the resources
  2. Invalid layoutId (please verify via /layouts) or displayGroupId (in this case, this refers to the Display ID).
  3. Incorrect parameter formatting (please check if the format layoutId_{displayGroupId}is correct).

Please let us know your updates, thank you!