Meawow baby thermometer - MMC-T201-1 incorrect readings

[cloudbr34k84]

The problem

The Xiaomi BLE integration is reporting different readings compared to the app used for this device.

What version of Home Assistant Core has the issue?

Latests

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

Xiaomi BLE

Link to integration documentation on our website

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

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response

[home-assistant]

Hey there @chemelli74, @epenet, mind taking a look at this issue as it has been labeled with an integration (samsungtv) you are listed as a code owner for? Thanks!

Code owner commands

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• @home-assistant close Closes the issue.
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• @home-assistant unassign samsungtv Removes the current integration label and assignees on the issue, add the integration domain after the command.

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samsungtv documentation
samsungtv source
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[home-assistant]

Hey there @Jc2k, @Ernst79, mind taking a look at this issue as it has been labeled with an integration (xiaomi_ble) you are listed as a code owner for? Thanks!

Code owner commands

Code owners of xiaomi_ble can trigger bot actions by commenting:

• @home-assistant close Closes the issue.
• @home-assistant rename Awesome new title Renames the issue.
• @home-assistant reopen Reopen the issue.
• @home-assistant unassign xiaomi_ble Removes the current integration label and assignees on the issue, add the integration domain after the command.

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xiaomi_ble documentation
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[Ernst79]

The temperature data of this device has been based on the information of BLE monitor. In BLE monitor, the following is reported in the documentation.

temperature DISCLAIMER - The sensor sends two temperatures in the BLE advertisements, that are converted to a body temperature with a certain algorithm in the original app. We tried to reverse engineering this relation, but we were only able to approximate the relation in the range of 36.5°C - 37.9°C at this moment. It has not been calibrated at elevated body temperature (e.g. if someone has a fever), so measurements displayed in Home Assistant might be different (wrong) compared to those reported in the app. It is therefore advised NOT to rely on the measurements in BLE monitor if you want to monitor your or other peoples body temperature / health). If you have additional measurements, especially outside the investigated range, please report them in this issue.

So, we either need to get the way they calculate the temperature, or we need to make a better approxiation. For that, we need more data, preferably a combination of the BLE advertisments (can be recorded by enabling debugging for the Bluetooth integration) and the measurement at the exact same time in the app.

[issue-triage-workflows]

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