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RELEASE NOTES

RELEASENOTES.md

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RELEASE NOTES

Migration Information

This version removes support for direct migration from versions before v8.1.0 (Doris)

See migration path for instructions how to migrate to a major version.

Do not upgrade from minimal to minimal version. It will most likely fail at some point and will require flashing via serial. If you do have to use minimal versions, always OTA to a full version of the same release before applying next minimal version.

Pay attention to the following version breaks due to dynamic settings updates:

  1. Migrate to Sonoff-Tasmota 3.9.x
  2. Migrate to Sonoff-Tasmota 4.x
  3. Migrate to Sonoff-Tasmota 5.14 (http://ota.tasmota.com/tasmota/release_5.14.0/sonoff.bin) - NOTICE underscore as a dash is not supported in older versions
  4. Migrate to Sonoff-Tasmota 6.7.1 (http://ota.tasmota.com/tasmota/release_6.7.1/sonoff.bin) - NOTICE underscore as a dash is not supported in older versions
  5. Migrate to Tasmota 7.2.0 (http://ota.tasmota.com/tasmota/release-7.2.0/tasmota.bin)

--- Major change in parameter storage layout ---

  1. Migrate to Tasmota 8.5.1 (http://ota.tasmota.com/tasmota/release-8.5.1/tasmota.bin)

--- Major change in internal GPIO function representation ---

  1. Migrate to Tasmota 9.1 (http://ota.tasmota.com/tasmota/release-9.1.0/tasmota.bin.gz)
  2. Upgrade to latest release (http://ota.tasmota.com/tasmota/release/tasmota.bin.gz)

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.

Supported Core versions

This release will be supported from ESP8266/Arduino library Core version 2.7.8 due to reported security and stability issues on previous Core version. This will also support gzipped binaries.

This release will be supported from ESP32/Arduino library Core version v3.1.11.

Support of ESP8266 Core versions before 2.7.8 and ESP32 Core versions before v3.1.11 have been removed.

Initial configuration tools

For initial configuration this release supports Webserver based WifiManager or Serial based command interface.

Initial installation

Easy initial installation of Tasmota can be performed using the Tasmota WebInstaller.

Provided Binary Downloads

ESP8266 or ESP8285 based

The following binary downloads have been compiled with ESP8266/Arduino library core version 2.7.8.

  • tasmota.bin = The Tasmota version with most drivers for 1M+ flash. RECOMMENDED RELEASE BINARY
  • tasmota-4M.bin = The Tasmota version with most drivers and filesystem for 4M+ flash.
  • tasmota-AD.bin to tasmota-VN.bin = The Tasmota version in different languages for 1M+ flash.
  • tasmota-lite.bin = The Lite version without most drivers and sensors for 1M+ flash.
  • tasmota-knx.bin = The Knx version without some features but adds KNX support for 1M+ flash.
  • tasmota-sensors.bin = The Sensors version adds more useful sensors for 1M+ flash.
  • tasmota-ir.bin = The InfraRed Receiver and transmitter version allowing all available protocols provided by library IRremoteESP8266 but without most other features for 1M+ flash.
  • tasmota-display.bin = The Display version without Energy Monitoring but adds display support for 1M+ flash.
  • tasmota-zbbridge.bin = The dedicated Sonoff Zigbee Bridge version for 2M+ flash.
  • tasmota-zigbee.bin = The dedicated cc25xx Zigbee Bridge version for 4M+ flash.

Above binaries are also available as gzipped version allowing faster uploads.

Latest released binaries can be downloaded from

Historical binaries can be downloaded from

The latter links can be used for OTA upgrades too like OtaUrl http://ota.tasmota.com/tasmota/release/tasmota.bin.gz

ESP32, ESP32-C2, ESP32-C3, ESP32-C5, ESP32-C6, ESP32-P4, ESP32-S2 and ESP32-S3 based

The following binary downloads have been compiled with ESP32/Arduino library core version v3.1.11.

  • tasmota32.bin = The Tasmota version with most drivers including additional sensors and KNX for 4M+ flash. RECOMMENDED RELEASE BINARY
  • tasmota32solo1.bin = The Tasmota version with most drivers including additional sensors and KNX for single core ESP32 and 4M+ flash.
  • tasmota32c2.bin = The Tasmota version with most drivers including additional sensors and KNX for ESP32-C2 with serial and 4M+ flash.
  • tasmota32c3.bin = The Tasmota version with most drivers including additional sensors and KNX for ESP32-C3 with USB HWCDC and fallback to serial and 4M+ flash.
  • tasmota32s2.bin = The Tasmota version with most drivers including additional sensors and KNX for ESP32-S2 with serial and 4M+ flash.
  • tasmota32s2cdc.bin = The Tasmota version with most drivers including additional sensors and KNX for ESP32-S2 with serial over embedded USB CDC only and 4M+ flash.
  • tasmota32s3.bin = The Tasmota version with most drivers including additional sensors and KNX for ESP32-S3 with USB HWCDC and fallback to serial and 4M+ flash.
  • tasmota32-AD.bin to tasmota32-VN.bin = The Tasmota version in different languages for 4M+ flash.
  • tasmota32-bluetooth.bin = The Bluetooth version adds BLE support for 4M+ flash.
  • tasmota32-display.bin = The Display version without Energy Monitoring but adds display support for 4M+ flash.
  • tasmota32-ir.bin = The InfraRed Receiver and transmitter version allowing all available protocols provided by library IRremoteESP8266 but without most other features for 4M+ flash.
  • tasmota32-lvgl.bin = The LVGL version adds Light and Versatile Graphics Library (LVGL) display support for 4M+ flash.
  • tasmota32-nspanel.bin = The Sonoff NSPanel Smart Scene Wall Switch version with HASPmota display support.
  • tasmota32-webcam.bin = The Webcam version adds webcam support for 4M+ flash.
  • tasmota32-zbbridgepro.bin - The Sonoff Zigbee Bridge Pro version with CC2652P firmware load support.

The following binary downloads have been compiled with ESP32/Arduino library core version v3.3.8.

  • tasmota32c5.bin = The Tasmota version with most drivers including additional sensors and KNX for ESP32-C5 with USB HWCDC and fallback to serial and 4M+ flash.
  • tasmota32c6.bin = The Tasmota version with most drivers including additional sensors and KNX for ESP32-C6 with USB HWCDC and fallback to serial and 4M+ flash.
  • tasmota32p4.bin = The Tasmota version with most drivers including additional sensors and KNX for ESP32-P4 with USB HWCDC and fallback to serial and 4M+ flash.

Latest released binaries can be downloaded from

Historical binaries can be downloaded from

The latter links can be used for OTA upgrades too like OtaUrl https://ota.tasmota.com/tasmota32/release/tasmota32.bin

Additional information

List of embedded modules.

Complete list of available feature and sensors.

Changelog v15.4.0 Sybil

Added

  • Support for JSON value pair "ARCH" in template being either ESP8266, ESP32, ESP32C2, ESP32C3, ESP32C5, ESP32C6, ESP32H2, ESP32H4, ESP32P4, ESP32S2 or ESP32S3
  • Support for Sensirion SCD42 and SCD43 CO2 sensor
  • Support for Sensirion STCC4 CO2 sensor
  • Shelly Pro EM-50 template {"NAME":"Shelly Pro EM-50","ARCH":"ESP32","GPIO":[0,0,224,0,3457,0,0,0,0,608,544,640,9472,0,5600,0,0,0,0,5568,0,0,0,0,0,0,0,0,5536,0,0,32,4736,0,0,0],"FLAG":0,"BASE":1,"CMND":"AdcGpio36 10000,10000,3350"} #24604
  • ESP8266 redesigned I2C Wire driver to support second I2C bus
  • Drivers PCA9685 and PCF8574 multi I2C bus support
  • Environment sensors CCS811, SCD30, SGP30 and SGP40 multi I2C bus support
  • Real Time Clocks BM8563, PCF85063 and PCF85363 multi I2C bus support
  • LCD multi I2C bus support
  • I2S full duplex, auto rx sample rate #24469
  • Sen5x power on delay of 60ms #24452
  • Berry solidification is now part of the build system #24664
  • Berry add loglevel to mqtt.publish() #24551

Breaking Changed

  • Renamed SCD40 sensors to their real names like SCD40 to SCD43

Changed

  • ESP8266 platform update from 2026.02.00 to 2026.04.00 #24635
  • ESP32 Platform from 2025.02.30 to 2026.04.30, Framework (Arduino Core) from v3.1.9 to v3.1.11 and IDF from v5.3.4.251226 to v5.3.4.260127 #24635
  • ESP32-C5/C6/P4 Platform from 2025.03.30 to 2026.04.50, Framework (Arduino Core) from v3.1.10 to v3.3.8 and IDF from v5.3.4.260127 to v5.5.4.260407 #24635
  • Adafruit_BusIO library from v1.11.0 to v1.17.4
  • Adafruit_CCS811 library from v1.0.0.14 to v1.1.3
  • Adafruit SGP30 library from v1.2.0 to v2.0.3
  • Adafruit SGP40 library from v1.1.0 to v1.1.4
  • Sensirion Core library from v0.6.0 to v0.7.2
  • LVGL library from v9.4.0 to v9.5.0 #24470
  • SHT1x software reset I2C bus after initial (un)detection
  • NeoPool always output valid sensitive data #24573
  • SML suppress MQTT publish until valid meter data received #24587
  • Berry faster compilation #24656
  • Matter improved parameters handling #24471

Fixed

  • ESP8266 heap drain and exception 29 when DHCP provides NTP server #24515, #24566
  • Crash when shutting down Wifi with Wifi 0 #24536
  • Don't send extraneous 0\r\n\r\n with non-chunked HTTP/1.0 #24518
  • Shelly Dimmer 2 serial timeout regression from v15.2.0.1 #24560
  • NeoPool possible IntegerDivideByZero #24578
  • Mitsubishi Electric HVAC memory leak and other issues for MiElHVAC #24660
  • File upload improvements: /ufsu api mode, no interrupts disabling, cleaner confirmation page #24521
  • Do not free BT memory when in use #24480
  • I2S mkv muxing for files #24666
  • Berry avoid tasmota.wifi() returning bad values when wifi is turned off #24505
  • Berry crash when comparing for equality float literals on ESP32 #24610

Removed

  • ESP8266 I2C Slave support which was never used by Tasmota anyway
  • Berry tasmota.urlbecload() superseded by Extension Manager #24493
  • Berry remove mdns.stop() #24549