Is it possible to update UbiSys H1 from local firmware ?

[hchiorean]

Hi,

I'm trying to update the firmware on a UbiSys H1 heating element. From the homepage of the manufacturer I see 1.7.2 as the latest version.

Zigbee2mqtt only shows 1.7.0 as the latest version and is unable to check for updates for some reason:

[2024-10-20 19:49:34] info: 	z2m:mqtt: MQTT publish: topic 'zigbee2mqtt/bridge/response/device/ota_update/check', payload '{"data":{"id":"<some_name>"},"error":"Failed to check if update available for '<some_name>' (Cannot destructure property 'status' of '(intermediate value)' as it is undefined.)","status":"error","transaction":"sj2kq-1"}'
[2024-10-20 19:49:34] error: 	z2m: Failed to check if update available for '<some_name>' (Cannot destructure property 'status' of '(intermediate value)' as it is undefined.)

So I'm trying to do the OTA update from the local firmware file and my_index.json using manufacturerCode: 4338.
It seems however that this is completely ignored when it comes to UbiSys devices.

Is there a way to do this ?

Thanks

[hchiorean]

For completion, what I tried so far is placing the 10F2-7B2D-0000-0001-0172044D-m7b-h1.ota.zigbee firmware downloaded locally into the data folder and having my_index.json like:

[   
  {      
	"url": "10F2-7B2D-0000-0001-0172044D-m7b-h1.ota.zigbee",
  }    
]

or

[
 {
	"manufacturerCode": 4338,
	"imageType":31533,
	"url": "10F2-7B2D-0000-0001-0172044D-m7b-h1.ota.zigbee",
 }
]	

or various other combination of attributes.