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Normal end-users should be warned against flashing this firmware was is the EZSP protocol version been incremented to EZSP v12 and Zigbee gateway solutions such as Home Asssitant's ZHA integration and Zigbee2MQTT are still only compatible with EZSP v11 and earlier EZSP versions at this time.
EZSP protocol version been incremented to EZSP v12 in Silicon Labs Gecko SDK v4.3 (4.3.0.0) / Zigbee EmberZNet v7.3 (7.3.0.0):
Sidenote - EmberZNet 7.3 is the first Silabs firmware release to be "Zigbee PRO 2023" compatible
Silicon Labs EmberZNet 7.3.0.0 is the first Silabs SDK that offers Zigbee R23 compliance, with it making their Silabs Zigbee stack compatible with Zigbee Protocol Specification Revision 23 / R23 (also known as "Zigbee PRO 2023" and "Zigbee 2023" ).
Zigbee
Zigbee R23 compliance, with these Security enhancements among others:
Dynamic link key negotiation
Device interview to query devices before they are allowed to join
Trust Center Swap Out to replace an existing Trust Center with a new one
Frame Counter Synchronization
Zigbee Direct Device (ZDD) support for:
Onboarding/commissioning
Communication to all Zigbee devices without a hub (Alpha), using Bluetooth LE
Zigbee Smart Energy 1.4a compliance (Alpha)
Enhancements to Zigbee Green Power (ZGP) APIs
New Zigbee Security upgrade component for moving encryption keys from cleartext NVM3 tokens into secure storage
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FYI, Silicon Labs have on the 7th of June 2023 released Gecko SDK (GSDK) v4.3 / 4.3.0 with Zigbee EmberZNet SDK v7.3 / 7.3.0.0 GA:
https://github.com/SiliconLabs/gecko_sdk/releases/tag/v4.3.0
https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-7.3.0.0.pdf
https://www.silabs.com/wireless/zigbee?tab=software#software
Normal end-users should be warned against flashing this firmware was is the EZSP protocol version been incremented to EZSP v12 and Zigbee gateway solutions such as Home Asssitant's ZHA integration and Zigbee2MQTT are still only compatible with EZSP v11 and earlier EZSP versions at this time.
EZSP protocol version been incremented to EZSP v12 in Silicon Labs Gecko SDK v4.3 (4.3.0.0) / Zigbee EmberZNet v7.3 (7.3.0.0):
https://github.com/SiliconLabs/gecko_sdk/blob/gsdk_4.3/protocol/zigbee/app/util/ezsp/ezsp-protocol.h#L33
0x0C hexadecimal = 12 in decimal.
Reference -> zigpy/bellows#563 and Koenkk/zigbee-herdsman#319
Sidenote - EmberZNet 7.3 is the first Silabs firmware release to be "Zigbee PRO 2023" compatible
Silicon Labs EmberZNet 7.3.0.0 is the first Silabs SDK that offers Zigbee R23 compliance, with it making their Silabs Zigbee stack compatible with Zigbee Protocol Specification Revision 23 / R23 (also known as "Zigbee PRO 2023" and "Zigbee 2023" ).
Zigbee
https://www.silabs.com/blog/zigbee-pro-2023-spec-released-increases-security
https://csa-iot.org/newsroom/zigbee-pro-2023-improves-overall-security-while-simplifying-experience/
https://csa-iot.org/wp-content/uploads/2023/04/05-3474-23-csg-zigbee-specification-compressed.pdf
Reference:
zigpy/zigpy#1211
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