Calendar events broadcasting, nothing showing...

BKeyport

0|run8080  | [2026-05-27 08:48:46.741] [DEBUG] [calendar] title: Winlink Wednesday Zoom class
0|run8080  | [2026-05-27 08:48:46.741] [DEBUG] [calendar] Event: Winlink Wednesday Zoom class | start: Wed Sep 16 2020 20:30:00 GMT-0700 (Pacific Daylight Time) | end: Wed Sep 16 2020 21:30:00 GMT-0700 (Pacific Daylight Time) | recurring: true
0|run8080  | [2026-05-27 08:48:46.743] [INFO]  [calendar] Broadcasting 165 events from https://calendar.google.com/calendar/ical/b7jirihj85d3klbcvja8im40fk%40group.calendar.google.com/public/basic.ics.

Running newest Magic Mirror, installed April 27, using Sam’s scripts.

I’m getting broadcasts as you can see, but default calendar and all modules that depend on it show nothing.

any clue what’s going on?

sdetweil

@BKeyport broadcasting is different than using

Can you explain the setup and config you are running.

Is this multiple systems to one server?

We added a caching handler to reduce unnecessary sends to the same module

sdetweil

@BKeyport were you able to resolve this?? the 165 events could have been all in the past too

BKeyport

@sdetweil Sorry, I’ve been away due to work issues. It is multiple systems to one server, and still unsolved. Worked fine before “upgrade” to current MM version.

sdetweil

@BKeyport hmmm. I think the caching might be affecting

Comment out these lines in calendar.js

KristjanESPERANTO

I tracked this down to a likely root cause: after the HTTPFetcher 304 change, some consumers were trying to process empty responses. In PR #4180, I fixed that for calendar and other consumers.

BKeyport

@sdetweil does not seem to affect anything.

            if (notification === "CALENDAR_EVENTS") {
                        // have we received events for this url
                        if (!this.calendarData[payload.url]) {
                                // no, setup the structure to hold the info
                                this.calendarData[payload.url] = { events: null, checksum: null };
                        }
                        // save the event list
                        this.calendarData[payload.url].events = payload.events;

                        this.error = null;
                        this.loaded = true;

                        if (this.config.broadcastEvents) {
                                this.broadcastEvents();
                        }
                        // if the checksum is the same
/*
                        if (this.calendarData[payload.url].checksum === payload.checksum) {
                                // then don't update the UI
                                return;
                        }
*/
                        // haven't seen or the checksum is different
                        this.calendarData[payload.url].checksum = payload.checksum;

sdetweil

@BKeyport thanks… I see an other change submitted today

https://github.com/MagicMirrorOrg/MagicMirror/pull/4180
which references this topic

if you want to try that do

cd ~/MagicMirror
# restore calendar.js 
git checkout defaultmodules/calendar/calendar.js
git fetch origin pull/4180/head:_fix_304
rm package-lock.json
git switch _fix_304
npm run install-mm
restart MM