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LYWSD03MMC - B1.4 flashing issue #355

@csatag94

Description

@csatag94

Hey guys, have anyone faced any issue like this?

17:34:49: Searching for devices
17:34:52: Connecting to: LYWSD03MMC
17:35:23: Detected Mi Thermometer
17:35:23: Fw_version: 2.1.1_0159
17:35:23: Connected
17:35:44: File was selected, size: 69680 bytes
17:35:44: Count: 4355
17:35:53: Received device infos are correct
17:35:54: Login successfull
17:35:57: Start DFU
17:36:12: Update error: NotSupportedError: GATT operation failed for unknown reason.
17:36:12: Disconnected.

The flashing process starts, but around 15% it stops and losing the connection.
I have 10 devices, 7 of them was done, but I have 3 with the same issue.
Thanks!

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