Switching LYWSD03MMC from Devbis to this version, OTA possible?

[EpicLPer]

Heya, short question.

I'm having major battery drain issues with my LYWSD03MMC from the Devbis version so I want to try this version here.
I'm using Z2M, can I simply just use OTA on those devices to upgrade them? If yes, what .zigbee file would I have to use exactly?

Thanks!

[pvvx]

https://github.com/pvvx/ZigbeeTLc/tree/master/bin/devbis

[EpicLPer]

@michaelnpunkt I simply put this in homeassistant/zigbee2mqtt/z2m_local_index.json

[
  {
      "url": "local_firmware/db15-0203-79993001-Z03MMC_v0129.zigbee"
  }
]

Then in a subfolder called local_firmware I put the above mentioned file. Afterwards put the following lines in homeassistant/zigbee2mqtt/configuration.yaml (disabling updates might not be needed)

ota:
  disable_automatic_update_check: true
  zigbee_ota_override_index_location: z2m_local_index.json

[michaelnpunkt]

thanks a lot @EpicLPer!

Unfortunately I keep getting this error when I try to update the device.
z2m: Failed to check if update available for 'HygroTemp.Wohnzimmer' (Not a valid OTA file)

Any tipps?

Here is the part I added to configuration.yaml

ota:     
  zigbee_ota_override_index_location: ota_local_index.json

And my ota_local_index.json

[
   {
      "url": "local_firmware/db15-0203-79993001-Z03MMC_v0129.zigbee",
      "force": true
   }
]

And in the folder local_firmware I put the zigbee file via
wget https://github.com/pvvx/ZigbeeTLc/blob/8f384a9887831d3f926813da15d146b2a7bf3e08/bin/devbis/db15-0203-79993001-Z03MMC_v0129.zigbee

[michaelnpunkt]

Status of my device:

[robvanoostenrijk]

Your wget command is downloading the HTML page from github and saving it as a firmware file.

Download the proper zigbee firmware with the following command:

wget https://github.com/pvvx/ZigbeeTLc/raw/refs/heads/master/bin/devbis/db15-0203-79993001-Z03MMC_v0129.zigbee

File should be:
131922 Aug 3 09:16 db15-0203-79993001-Z03MMC_v0129.zigbee

[michaelnpunkt]

Thank you - now its working!