Breaking changes

Drop support Gateway firmwares lower than v1.4.7
Drop support Hass lower than v2021.7
ZHA and zigbee2mqtt modes combined to single option. If you have used them, you MUST turn this setting off, apply it, and then turn it back on and apply it. This will update the zigbee chip firmware
zigbee2mqtt has experimental EFR32 support, works poorly and is not recommended for use

Rework

All of the component code is now asynchronous. Should improve performance and reduce automation delays
The ZHA modes now use a new version of zigbee firmware, running at a reduced speed of 38400 and with software flow control. The socat application has been replaced by ser2net. Should improve performance
Completely rewritten the zigbee chip firmware update procedure. Should improve stability of this function
Completely rewritten application management on the gateway. Should improve stability
Changed buzzer disabling. Now buzzer does not work only when adding new devices (5 seconds motion sensor problem). In other cases the button, LED and buzzer works
Changed processing of zigbee parents. Adds questions when information unknown

Added option to transfer storage to memory. Should significantly reduce zigbee and bluetooth data errors
Added zigbee device reboot counting. Allows you to find devices with a dead battery
Added serial port error statistics

ATTENTION: If you using two Hass with one gateway - you should use same integration version on both of them!