Zigbee2Tasmota (Z2T) OTA firmware update for devices

[nagyrobi]

Is there a way to make OTA firmware updates of the Zigbee devices through Zigbee2Tasmota?
IKEA and LEDVANCE support this, moreover, some devices like IKEA's SYMFONISK Sound Controller have a hard time working properly with third party coordinators unless they get a recent firmware update. But it's a bit hard to perform an update without Ikea's original coordinator...

[s-hadinger]

No it's not implemented and will not be. The ESP8266 is too limited for this. The best option would be to have an external program driving the OTA update via TCP bridge, like ZHA is doing. But I don't know if ZHA does OTA upgrades.

[s-hadinger]

What do you mean "a template". OTA through Zigbee is a whole state machine and a whole pile of code to write. Not just a template.

[songhellobulter]

I mean like a flowchart. Does the state machine deal with states like:

New OTA file
Zbsend
Block ACK
Send block
endOfOTA

Thank you.

[Jason2866]

Well if you really need this you should dive into this special zigbee topic. It is not a trivial feature. Zigbee is a standard, search the documentation and learn how it works. A simple flow chart will help you nothing. If you want or need it you have to do yourself. There is no wish list for Tasmota to get anything done.

A general rule there is no private email communication. Please delete your email contact in your post.

[songhellobulter]

Appreciated if you could provide as much guidance as possible. Where should we start? Here it is a simple OTA procedure. Where should we pay more attention? Thank you very much.

[s-hadinger]

OTA is fully described in Zigbee ZCL specification chapter 11. There are 80 pages of specs, so it's not that simple. I haven't read them, I suggest you first read them, including the frame format of ZCL (chapter 2).

Scanning through the spec, it seems that you first need to send a "Image Notify" command (command 0x00) to the device on the OTA cluster. The payload is described in section 11.13.3.1.

[Jason2866]

This is updating the zigbee stack in the cc25xx. This is not new. The ccloader Tasmota driver to flash the cc25xx is already there and was ported from @Staars https://github.com/arendst/Tasmota/blob/development/tasmota/xdrv_46_ccloader.ino
@nagyrobi asked for a way to flash zigbee end devices via OTA with a new firmware.

[yzg011]

this way is not good， when using ccloader， then zigbee2tasmota can not use