Does Aqara provide OTA firmware updates via 3rd party products like Home Assistant? If not, is there a chance they will start doing this? With the still quickly evolving standard, I feel this is a mandatory feature, as each new version adds functionalities that most devices already expose via ZigBee
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This works for most devices via Zigbee2MQTT. I’m not sure if it’s possible for all of them.
Check for your specific devices at:
Aqara doesn’t publish the URLs of firmware updates so it relies on community members manually extracting the URLs during an update process and submitting the firmware images to public repositories.
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Thank yo that is to bad.
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Are you only interested in Zigbee?
For Matter, there is a directory called the Distributed Compliance Ledger (DCL), which contains all official information about devices. Manufacturers can store software update details (links and checksums) there. Home Assistant checks the ledger, finds the secure path, and then downloads the update directly from the manufacturer.
The URLs for the firmware provided by the manufacturer can be viewed publicly at: Distributed Compliance Ledger
Im actually more interested in matter over tbread. Should have probably mentioned that 
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you can’t update 3rd party matter devices in aqara, not supported
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That’s good to know 
In answer to your specific question:
Yes, Aqara provides a link to the firmware update in the Distributed Compliance Ledger (DCL) for certain Matter devices. In this case, you can update the device via Home Assistant.
I have upgraded my Aqara P2 Motion Sensor (Matter over Thread) to version 1.0.3 in Home Assistant. However, this update has now been marked as invalid and Home Assistant no longer downloads it.
A link to the firmware for the W100 was also provided, for example. While there is an entry in the DCL for the P100 sensor, no firmware information was included. It therefore depends on whether Aqara has stored the firmware information in the DCL.