See [migration path](https://tasmota.github.io/docs/Upgrading#migration-path) for instructions how to migrate to a major version. Pay attention to the following version breaks due to dynamic settings updates:
While fallback or downgrading is common practice it was never supported due to Settings additions or changes in newer releases. Starting with release **v9.1.0 Imogen** the internal GPIO function representation has changed in such a way that fallback is only possible to the latest GPIO configuration before installing **v9.1.0**.
This release will be supported from ESP8266/Arduino library Core version **2.7.4.9** due to reported security and stability issues on previous Core version. This will also support gzipped binaries.
In addition to TLS using fingerprints now also user supplied CA certs and AWS IoT is supported. Read [full documentation](https://tasmota.github.io/docs/AWS-IoT)
For initial configuration this release supports Webserver based **WifiManager** or **Serial** based command interface only. Support for **WPS** and **SmartConfig** has been removed.
- **tasmota-knx.bin** = The Knx version without some features but adds KNX support.
- **tasmota-sensors.bin** = The Sensors version adds more useful sensors.
- **tasmota-ir** = The InfraRed Receiver and transmitter version allowing all available protocols provided by library IRremoteESP8266 but without most other features.
- **tasmota-display.bin** = The Display version without Energy Monitoring but adds display support.
- **tasmota-minimal.bin** = The Minimal version allows intermediate OTA uploads to support larger versions and does NOT change any persistent parameter. This version **should NOT be used for initial installation**.
The attached binaries can also be downloaded from http://ota.tasmota.com/tasmota/release for ESP8266 or http://ota.tasmota.com/tasmota32/release for ESP32. The links can be used for OTA upgrades too like ``OtaUrl http://ota.tasmota.com/tasmota/release/tasmota.bin.gz``
- Command ``L1MusicSync <0|Off>|<1|On>|<2|Toggle>, 1..10, 1..100>`` to control Sonoff L1 Music Sync mode sensitivity and speed [#10722](https://github.com/arendst/Tasmota/issues/10722)
- Command ``SetOption118 1`` to move ZbReceived from JSON message and into the subtopic replacing "SENSOR" default [#10353](https://github.com/arendst/Tasmota/issues/10353)
- Command ``SetOption119 1`` to remove the device addr from json payload, can be used with zb_topic_fname where the addr is already known from the topic [#10355](https://github.com/arendst/Tasmota/issues/10355)
- Commands ``ChannelRemap``, ``MultiPWM``, ``AlexaCTRange``, ``PowerOnFade``, ``PWMCT``, ``WhiteBlend`` and ``VirtualCT`` as synonyms for ``SetOption37, 68, 82, 91, 92, 105`` and ``106``
- Commands ``ZbNameKey``, ``ZbDeviceTopic``, ``ZbNoPrefix``, ``ZbEndpointSuffix``, ``ZbNoAutoBind`` and ``ZbNameTopic`` as synonyms for ``SetOption83, 89, 100, 101, 110`` and ``112``
- Commands ``ZbNoAutoBind``, ``ZbReceivedTopic`` and ``ZbOmitDevice`` as synonyms for ``SetOption116, 118`` and ``119``
- Commands ``BuzzerActive`` and ``BuzzerPwm`` as synonyms for ``SetOption67`` and ``111``
- Support for time proportioned (``#define USE_TIMEPROP``) and optional PID (``#define USE_PID``) relay control [#10412](https://github.com/arendst/Tasmota/issues/10412)
- Disabled ``USE_LIGHT`` light support for ZBBridge saving 17.6kB [#10374](https://github.com/arendst/Tasmota/issues/10374)
- Force initial default state ``SetOption57 1`` to scan wifi network every 44 minutes for strongest signal [#10395](https://github.com/arendst/Tasmota/issues/10395)
- Shelly Dimmer power on state [#10154](https://github.com/arendst/Tasmota/issues/10154) [#10182](https://github.com/arendst/Tasmota/issues/10182)
- Wemo emulation for single devices [#10165](https://github.com/arendst/Tasmota/issues/10165) [#10194](https://github.com/arendst/Tasmota/issues/10194)
- ESP32 LoadStoreError when using ``#define USER_TEMPLATE`` [#9506](https://github.com/arendst/Tasmota/issues/9506)
