Following update, only the most recent events were synced to Android
Making the transition to v2 solved most problems here, but with one out of 8 calendars I am getting this: out of 1700 events in Thunderbird on w10, only around 70 (all recent ones) show up on Android. On the w10 system I see:
syncthingfolder\decsync\calendars\my_calendar_id\stored-entries is 1244kB
syncthingfolder\decsync\calendars\my_calendar_id\stored-entries\mobile_id is 1231kB
syncthingfolder\decsync\calendars\my_calendar_id\stored-entries\PC_id is 13kB
syncthingfolder\decsync\calendars\my_calendar_id\v2\ is 163kB
syncthingfolder\decsync\calendars\my_calendar_id\v2\mobile_id is 87kB
syncthingfolder\decsync\calendars\my_calendar_id\v2\PC_id is 76 kB
So, stored-entries seems to contain the full set as seen by Thunderbird, but the v2 folder contains only the newer events, which is what Android sees. I am not sure if there is a way to make the remaining 1630 events visible on Android. Opening and just saving an older event in Thunderbird, forces Radicale and DecSync to treat that as an update and the event is then synced across devices. The problem is I'd rather not do that manually 1630 times and I can't tell Thunderbird to 'update' 1630 events automatically.
Android 7, Moto G4
Hm, you do have some serious issues for which I don't really know the cause.
A workaround for this would be to export the calendar in Thunderbird as an .ics file and then import it again. Hopefully this will update all events.
A workaround for this would be to export the calendar in Thunderbird as an
.icsfile and then import it again. Hopefully this will update all events.
I tried back then and again now to import the ics as a new calendar but TB fails with:
uncaught exception: 2152333314 calCachedCalendar.js:794:30
adoptItem resource:///components/calCachedCalendar.js:794
addItem resource:///components/calCachedCalendar.js:738
promiseOperation resource:///modules/calendar/utils/calAsyncUtils.jsm:24
get resource:///modules/calendar/utils/calAsyncUtils.jsm:36
putItemsIntoCal chrome://calendar/content/import-export.js:199
AsyncFunctionNext self-hosted:692
handle resource:///modules/MessengerContentHandler.jsm:496
[Exception... "<error>'<error>' when calling method: [calICalendar::adoptItem]" nsresult: "0x804a0002 (<unknown>)" location: "JS frame :: resource:///components/calCachedCalendar.js :: adoptItem :: line 794" data: no] calCachedCalendar.js:794:30
adoptItem resource:///components/calCachedCalendar.js:794
addItem resource:///components/calCachedCalendar.js:738
promiseOperation resource:///modules/calendar/utils/calAsyncUtils.jsm:24
get resource:///modules/calendar/utils/calAsyncUtils.jsm:36
putItemsIntoCal chrome://calendar/content/import-export.js:199
AsyncFunctionNext self-hosted:692
handle resource:///modules/MessengerContentHandler.jsm:496
Uploading the .ics to Radicale generates a Error: 400 Bad Request which doesn't help either.
Ideally, Thunderbird and Radicale/decsync would be able to resync/refresh everything, but apparently it's not possible. The result is that in unusual scenarios you may end up with Radicale/decsync being aware of only a subset of the events TB stores.