Two-stage firmware? about z03mmc

[devbis]

The size for the firmware is almost 128kb that makes impossible to flash it with you flashing tool after adding more features and spilling over 129kb (due to restrictions in the web UI). In this case bluetooth firmware should be able to write a firmware to 0x40000 address, what is intermediate firmware does.

ota_40000 is literally doing what you've said (it's your code modified). It looks for the boot flag in 0x20000, moves itself to 0x40000, and changes its segments to let next zigbee firmware be written to 0 or 0x40000.

[pvvx]

For double flashing, you need to use a random MAC.
Otherwise, there will be problems described in this issue

Для двойной перепрошивки требуется использовать случайный MAC.
Иначе будут проблемы, описанные в этом issue

[pvvx]

Starting from firmware version v4.6, all thermometers in TelinkMiFlasher.html (v6.9) support BigOTA.

BigOTA is enabled if the OTA file is larger than 128 kilobytes.
BigOTA download occurs at address 0x40000.
BigOTA size limit is 221184 bytes. The MAC of the device is written at address 0x76000.

If the battery is low, the connection may be interrupted. Then you will need to download again.
For example, MiHome does not allow OTA when the battery charge is less than 50%.

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Начиная с версии прошивки v4.6, все термометры в TelinkMiFlasher.html (v6.9) поддерживают BigOTA.

BigOTA включается, если файл OTA более 128 килобайт.
Загрузка BigOTA происходит по адресу 0x40000.
Ограничение размера BigOTA в 221184 байт. По адресу 0x76000 записан MAC устройства.

При слабой батарее возможен разрыв связи. Тогда потребуется повторить загрузку.
Например, MiHome не разрешает ОТА при заряде батареи менее 50%.