Core: MQTT camera not working on 0.87

[nickrout]

Home Assistant release with the issue:
0.87

Last working Home Assistant release (if known):

0.86.4

Operating environment (Hass.io/Docker/Windows/etc.):

NUC running ubuntu 18.04 with ha in a virtualenv

Component/platform:

mqtt camera

Description of problem:

Since 0.87 motion snapshot camera from the dafang_hacked Xiaomi Dafang camera no longer works. This is an mqtt camera which is auto discovered thru mqtt discovery. There is an error in homeassistant.log.

2019-02-08 19:29:31 WARNING (MainThread) [homeassistant.components.mqtt] Can't decode payload b'\xff\xd8\xff\xdb\ (long string of similar stuff) \xd9' on myhome/dafang/motion/snapshot with encoding utf-8

Problem-relevant configuration.yaml entries and (fill out even if it seems unimportant):

Traceback (if applicable):

Additional information:

[mikeage]

[I'm not the OP, but here's my config. I'm also using autodiscovery]
MQTT message:

homeassistant/camera/dafang2/motion_snapshot/config {"name": "dafang2 motion snapshot", "unique_id": "7811dc74e776-motion-snapshot", "device": {"identifiers": "7811dc74e776", "connections": [["mac", "78:11:dc:74:e7:76"]], "manufacturer": "Xiaomi", "model": "Dafang", "name": "Xiaomi Dafang", "sw_version": "Dafang Hacks"}, "topic": "myhome/dafang2/motion/
"}

HA Logs:

Feb 08 11:13:13 raspberrypi hass[29079]: 2019-02-08 11:13:13 INFO (MainThread) [homeassistant.components.mqtt.discovery] Component has already been discovered: camera dafang2 motion_snapshot, sending update
Feb 08 11:13:13 raspberrypi hass[29079]: 2019-02-08 11:13:13 INFO (MainThread) [homeassistant.components.mqtt] Got update for entity with hash: ('camera', 'dafang2 motion_snapshot') '{'platform': 'mqtt', 'name': 'dafang2 motion snapshot', 'state_topic': 'homeassistant/camera/dafang2/motion_snapshot/state', 'topic': 'myhome/dafang2/motion/snapshot', 'device': {'sw_version': 'Dafang Hacks', 'name': 'Xiaomi Dafang', 'connections': [['mac', '78:11:dc:74:e7:76']], 'model': 'Dafang', 'identifiers': '7811dc74e776', 'manufacturer': 'Xiaomi'}, 'unique_id': '7811dc74e776-motion-snapshot', 'discovery_hash': ('camera', 'dafang2 motion_snapshot')}'

In addition to the log, the snapshot isn't shown in the UI (lovelace, picture-entity, showing camera.dafang2_motion_snapshot)

[jmtatsch]

Support to skip decoding was added in #20292 , however, the payload should imho never be read if there is not an automation triggering on the event.

[mikeage]

Even if there's no automation, what about if the entity is being displayed?

[jmtatsch]

True, that would be a good place to look at.

[pullaf]

I too have this problem, snapshots don't work anymore

[jurgenweber]

as mentioned here: https://github.com/home-assistant/home-assistant.io/pull/8247#issuecomment-461583578

I have a mqtt camera, I added:

camera:
  - name: Porch
    platform: mqtt
    topic: camera/porch
+   payload: 'on'
+   encoding: ''

but I still get the whole payload and error in my logs.

[homeassistant.components.mqtt] Can't decode payload b'\.... <payload>.....' on camera/porch with encoding utf-8

I only started receiving this with my 0.87 upgrade.

I feel the default decoding for a camera should have the utf-8 off..... :)

[nickrout]

The encoding: ''seems to relate to automations, not to the mqtt camera component. See https://www.home-assistant.io/docs/automation/trigger/#mqtt-trigger

[jurgenweber]

ok, well why do we have an encoding error? My camera is dead.

[nickrout]

Well not exactly dead, you still have camera via the generic component, like

- platform: generic still_image_url: https://[email protected]/cgi-bin/currentpic.cgi name: cam1 verify_ssl: false authentication: digest

And you still have a motion detection sensor via mqtt.

There was a big change in mqtt components and I suspect something got dragged along.

[emontnemery]

Can you please paste a log with the error message?

[nickrout]

@emontnemery it is very long, are you sure?

Also do you need just the error line, or a whole log? If so I'll restart HA and get you the whole thing.

PS the log message (minus man many lines of escaped binary) is in the first post.

[nickrout]

Meanwhile, I am sure the error message is coming from here https://github.com/home-assistant/home-assistant/blob/b1faad0a50a0dd27d0f471a1ce22bff951649e57/homeassistant/components/mqtt/__init__.py#L781 (and the lines below).

[mikeage]

@emontnemery , here's a sample log showing one snapshot arriving via MQTT
mqtt_snapshot_decode_error.log

[nickrout]

Or if this is more accessible

http://paste.ubuntu.com/p/SnyKChD5h2/

But really it shows no a lot more than what I showed in my original post.

[emontnemery]

Thanks for the logs and more details, very helpful. I'll get this fixed within the next couple of days.

[mikeage]

Thanks. Happy to help with testing if you need

[emontnemery]

@mikeage Please try the change in #20932

[mikeage]

Will do; I'll be home in ~7 hours and will check then

[mikeage]

I guess it's a bit late for me to say so, but this works. Thanks :-)

[nickrout]

Yeah it works, thank you all concerned.

[jurgenweber]

is this in 0.87.1?

[jmtatsch]

no, targeted for 0.87.2

[jurgenweber]

is there going to be a 0.87.2 rls'd?.... or we just waiting for 0.88.0.

[adrianmihalko]

I have similar problem in 0.88.1:

2019-02-22 20:45:30 WARNING (MainThread) [homeassistant.components.mqtt] Can't decode payload b'\x10\x11\xca\x01\x00\x00\x00\x00 |\xc9\x01\x00\x00\x00\x00\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00@\x05\xca\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' on homeassistant/sensor/test1/outside_temperature/config with encoding utf-8

[nickrout]

@adrianmihalko What firmware is your sensor running?

[adrianmihalko]

I am running EspEasy.

[emontnemery]

@adrianmihalko that looks like corrupted retained message, maybe caused by this bug eclipse/mosquitto#1161
You can try to reset your mosquitto database