MELCloud reported energy consumption drops briefly to 0kWh after recent firmware update

[KingJ]

The problem

My Mitsubishi Electric MSZ-EF air-to-air heat pump units recently received a firmware update for their MAC-567IF WiFi interfaces. Although this finally seems to allow the units to receive commands in real time (rather than polling MELCloud every minute), it also seems to result in the reported cumulative energy consumption dropping to zero for a few minutes, and then returning to the normal value. As a result, this wildly skew's Home Assistant's Energy statistics for individual devices, as every drop to zero and subsequent return to normal results in that much energy being considered as consumed. For example, so far today this means Home Assistant thinks the unit has consumed 5,803.6kWh of energy whereas in reality total consumption today has increased from 965.4kWh to 967.7kWh (i.e. an increase of 2.3kWh).

This has also been reported by another user on the Home Assistant Community, with a similar effect on their Energy reports.

This is not a bug caused by a change in Home Assistant, rather it appears to be a bug in how the new firmware on these units affects energy readings in MELCloud. Unfortunately I cannot find any references to the firmware version - I was offered it as an update a few days ago and accepted it. It is the first update firmware update I have had for these units since installing them last year.

What version of Home Assistant Core has the issue?

core-2021.11.5

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

melcloud

Link to integration documentation on our website

https://www.home-assistant.io/integrations/melcloud/

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response

[probot-home-assistant]

melcloud documentation
melcloud source
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[probot-home-assistant]

Hey there @vilppuvuorinen, mind taking a look at this issue as it has been labeled with an integration (melcloud) you are listed as a code owner for? Thanks!
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[vilppuvuorinen]

This is not a home-assistant issue. Please report the client lib issues here: https://github.com/vilppuvuorinen/pymelcloud

[KingJ]

Thanks @vilppuvuorinen, i'll close this out and report it over on the pymelcloud repo.