Tasmota v15.5.0 Sylvan

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: Migrate to Sonoff-Tasmota 3.9.x Migrate to Sonoff-Tasmota 4.x 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 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 Migrate to Tasmota 7.2.0 (http://ota.tasmota.com/tasmota/release-7.2.0/tasmota.bin) --- Major change in parameter storage layout --- Migrate to Tasmota 8.5.1 (http://ota.tasmota.com/tasmota/release-8.5.1/tasmota.bin) --- Major change in internal GPIO function representation --- Migrate to Tasmota 9.1 (http://ota.tasmota.com/tasmota/release-9.1.0/tasmota.bin.gz) 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 v3.3.8. Support of ESP8266 Core versions before 2.7.8 and ESP32 Core versions before v3.3.8 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 https://github.com/arendst/Tasmota-firmware/tree/firmware/release-firmware http://ota.tasmota.com/tasmota/release Historical binaries can be downloaded from http://ota.tasmota.com/tasmota/release-15.5.0 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 v3.3.8. 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. 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. 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. Latest released binaries can be downloaded from https://github.com/arendst/Tasmota-firmware/tree/firmware/release-firmware https://ota.tasmota.com/tasmota32/release Historical binaries can be downloaded from https://ota.tasmota.com/tasmota32/release-15.5.0 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 v15.5.0 Sylvan Added Build copy firmware artifacts with ELF-extracted build timestamp (opt-in) #24794 Command SetOption [0..2] to display SetOption values Command WcResolution 0..24 increasing camera max resolution from 14 to 24 Command BSSid[1|2] [0|1|11:22:33:44:55:66] to select fixed WiFi Access Point disabling SetOption56 and SetOption57 #24394 Support for hostname generation using single-specifier Format() patterns #24731 Support for Modbus RX Enable GPIO #24726 Support for multi-byte chars like emojis (💡) in light device toggle buttons #24482 Support for M5Stack Atom S3R drivers #24747 Support for uDisplay ST7305 #24738 Support for Modbus Relays #24812 Support for hosted MCU other than esp32c6 Serial console support for Backspace when enabling #define USE_SERIAL_BACKSPACE #24830 Trigger events to Berry when USE_RULES is not enabled #24796 MiElHVAC extend support of AirDirection control #24675 ESP32 VID6608 hardware RMT support for Automotive gauge driver #24759 Berry add support for pre-processor #24679 Berry transpose C defines to Berry in tasmota_defines_for_berry.be #24680 Berry RGBW white blend and 10-bit gamma support to Berry LED pixel rendering #24750 Berry manual tool to compare and verify solidification between C and Python #24754 Enhance Matter plugin functionality for On/Off control and add support for Global Scene Control and related commands #24854 Changed ESP32 Platform from 2025.04.30 to 2026.05.50, Framework (Arduino Core) from v3.1.11 to v3.3.8.260506 and IDF from v5.3.4.260127 to v5.5.4.260407 #24718 Sensirion_Core library from v0.7.2 to arduino-core v0.7.3 SCD30 library FrogmoreScd30 to Sensirion arduino-i2c-scd30 v1.1.1 SCD4x library FrogmoreScd40 to Sensirion arduino-i2c-scd4x v1.1.0 SPS30 library Sensirion arduino-i2c-sps30 v1.0.1 Code hardening replacing strcat and strcpy with safer alternatives #24832 Increase security by inverting state of define DISABLE_REFERER_CHK controlling remote HTTP access which is now default off ESP8266 wrap printf and replace with stubs reducing flash size by 6k #24714 Move autoconf repository to ota.tasmota.com #24754 Berry optimized solidified structures for code constants and maps #24838 Berry format() now uses internal ext_snprintf_P() for floating point formatting #24725 LVGL splash screen uses default Montserrat-14 instead of Montserrat-20 on small screens #24735 Fixed Crash when MQTT-TLS when tcp connection failed #24798 SPS30 not detected on ESP8266 #24780 SML modbus/TCP on ESP32-p4 with only Ethernet shows "SML: could not connect TCP since wifi is down" #24845 I80 pushColors swap logic for parallel displays #24766 MiElHVAC sensor and settings out of sync #24813 NeoPool possible overflow/div-zero errors and Hydrolysis module detection #24724 Seesaw encoder position tracking in light control mode #24730 Berry write(value:int | s:string) -> nil internal argument parsing #24800 Removed USE_UNIVERSAL_TOUCH no more forced when USE_UNIVERSAL_DISPLAY is enabled #24743