Vnish

03/12/2026

🔓 Antminer AML Unlocked!

Starting September 2025, Bitmain began shipping Amlogic control boards with the SD card downgrade feature disabled by default. This effectively blocks users from installing custom firmware like VNISH via the standard method.

We have released a comprehensive technical guide to bypass this restriction using a UART connection. The manual covers:

- Hardware Setup: Connecting any USB-UART adapter (like CP2102) to the board’s RX/TX pins.

- Terminal Configuration: Using PuTTY with a 115200 baud rate.

- The Unlock Hack: Using specific commands to enable the USB/SD switch in the environment settings.

Once unlocked, you can freely downgrade your firmware and install Vnish for maximum efficiency.

Read the full manual here:🔗 https://vnish.group/en/en_aml_unlock/

Don't let locked firmware limit your hash rate. 💪🔥

12/22/2025

New release - VNISH firmware 1.2.7! https://vnish.group/en/bitmain/

🆕 New Antminer models
• S19 XP+
• S19 XP+ Hydro
• U3S19XPH
• S21e Hydro
• U3S21EXPH

🆕 Extended submodel support
• S19 XP — BHB56806
• S19j XP — BHB56804-
• S19k Pro — BHB56907
• S21+ Hydro — H6HB70702, H6HB70704
• S21+ — A3HB70702, A3HB70703
• S21 Pro — A3HB70603
• S21 XP — A3HB70502, A3HB70503

✅ you can update in auto mode using VNISH ONLINE UPDATER

🔹 Download VOU (https://vnish.us/files/tools/vou.zip)

10/28/2025

BREAKTHROUGH IN REMOTE INSTALLATION!
Now you can install Vnish firmware on ANY stock Bitmain device remotely via Toolkit - without SD cards and trips to the farm.

⭐️ Universal remote installation Vnish/Hashcore:
- New universal method for installing Vnish/Hashcore firmware on stock Bitmain devices
- Removed stock firmware date restriction (February 2024)
- Ability to remotely install on devices with any stock firmware versions via Toolkit
- Eliminated the need for physical presence and SD card usage
- Support for all Antminer models regardless of factory firmware version
https://vnish.group/en/bitmain/

05/29/2025

New release - VNISH firmware 1.2.6 STABLE! https://vnish.group/en/bitmain/

🆕 Expanded Miner Support
• Newly Antminer supported models:
• T19 Pro Hydro, S19j XP, S19e XP Hydro, S19 Pro Hydro (120 chips)
• S21 XP, S21+, S21+ Hydro, S21 Immersion, S21 Pro,
• S21 XP Hydro, S21 XP Immersion, T21 with Xilinx and L9
• Antminer submodel support added for:
• S19 XP: BHB56802
• S21 Hydro: HHB68601, HHB68502, HHB68503
• T21: BHB68701-
• S21: BHB68606, BHB68603P, BHB68603-

⚙️ New Features & Enhancements
• Added ability to edit tuned presets
• Chinese language now available in dashboard
• New detailed graph for power consumption
• Shows miner consumption and hashboards from presets (for models without PSU consumption reporting)
• Water temperature widget for Antminer S19 Pro Hydro and S19 Pro Plus Hydro (inlet/outlet)
• Miner Initialization: Quick pause during initialization
• PSU temperature monitoring support
• Automatic preset retuning after repeated “Chain Break Detected” errors
• Comprehensive error system with detailed error codes
• Updated voltage limits for Antminer T21
• Automatic shutdown on any chain error for models without PIC controllers
• Charts now persist after reboot
• Resolved unexpected miner crash

🔧 New Configuration Options
• Preset Switcher options:
• Ignore fan speed and Auto-lower top preset based on temperature
• Chip Throttling: Available for x21 series (excluding S21 Pro)
• Sensor Handling:
• Option to ignore chip temperature sensors (Antminer L9, Antminer S21, Antminer T21, Antminer S21 Imm, Antminer S21 Hydro)
• Option to skip broken temperature sensors
• Startup Control:
• Configurable delay before mining starts (reduces startup power spikes)
• Configurable minimum number of operational boards required to start mining

🔧 Bug Fixes
• Fixed occasional EEPROM corruption
• Fixed issue with pool configuration loss on abrupt shutdown
• Fixed dashboard freezing caused by error handling
• Fixed immersion mode unexpectedly resetting to auto

⚠️ Deprecated Features
• Removed Hotel Pool and `Fees` tab

🌡 Preset & Temperature Control Improvements
• Preset Switcher thresholds updated: RISE at 85 °C and DECREASE at 90 °C
• New presets added for: Antminer S19j Pro+, S19a, S19 XP, S21
• Corrected presets for: Antminer S19e XP Hydro, S19 (76 chips), S19j Pro, S19 Pro+ Hydro, L7 and S19i

🌬 Fan & Cooling Enhancements
• Added maximum fan speed limit for auto mode
• Reduced minimum fan speed during pause to 0%
• Increased maximum fan speed to 90% during preset increase
• Improved fan control logic based on temperature

⚙️ Configuration & System Behavior
• Restart Configs: Max Restart Attempts now defaults to disabled (0)
• TimeZone:
• Added time zone handling for Cvitek
• Full reboot now required when changing time zone
• EEPROM Reading: Accelerated on all boards except XIL
• Default Support: Default board_model assigned for miners without EEPROM
• Logging:
• Logs not saved after reboot on Cvitek boards
• Chip ID shown in logs during overheat events

🌍 User Experience (UX) & UI Improvements
• Dashboard now auto-detects system/browser language at first launch
• Various UI and UX enhancements for improved usability

🔐 Stability, Performance & Security
• Improved autoswitcher and autotune performance
• General system stability improvements
• Strengthened firmware security
• Improved PSU compatibility across supported models
• Added brute-force protection for web interface passwords

💻 API Changes
• Factory Info Enhancements: Added `has_pics`, `psu_model`, and `psu_serial` to response
• New API Fields:
• `summary`: includes `hr_nominal` (theoretical hashrate)
• `info`: includes `build_uuid`, `build_name`
• `metrics`: includes `power_consumption`
• `chips`: includes `throttled` field

05/14/2025

Cambridge Report: The most popular firmware among miners

Cambridge report reveals Vnish as the most popular third-party firmware among Bitcoin miners, offering top performance, efficiency, and control.

03/27/2025

New release - VNISH firmware 1.2.6 rc5! https://vnish.group/en/bitmain/

📢 New Features:
- Added support for Antminer L9, Antminer S21+, Antminer S21+ Hydro, and Antminer S19 Pro Hydro (120 chips)
- Add advanced option:
- Ignore chip's temperature sensors for Antminer L9, Antminer S21, Antminer T21, Antminer S21 Imm and Antminer S21 Hydro
- Maximum delay time before mining startup (delayed start of mining to ease power grid/infrastructure load) for all models
- Minimum number of operational boards required to start mining for all models
- Display miner consumption and hashboards from the preset (where the psu doesn't give out consumption)

⚠️WARNING: Ignore chip's temperature sensors and Skip broken temperature sensors - disables temperature-based protection. We are not responsible for any damage caused.

🚦 Improvements:
- Optimized fan control based on temperature
- The Stop mining in case of faulty chain behavior — if zero chips are detected on a hashboard, the miner will now enter an error state
- Chip ID is now shown in the logs when overheating occurs due to high chip temperatures
- Corrected model name display for Antminer S19 (126) and Antminer S19 (88)
- Enhanced overall miner stability
- Improved stability of work with pools
- Implemented various UI/UX enhancements

🐞 Bug Fixes:
- Fixed issue where domains would attempt to rebalance during pause
- Fixed issue where pools were lost after a power outage or miner restart
- Fixed miner pausing when resetting a preset or restarting the mining process with Resume mining after reboot disabled

💻 API Changes:
- Programmatically disabled boards are now included in summary/chains API responses

03/05/2025

Amazing news! 🔥 Introducing the Vnish monitoring bot - a completely free service designed specifically for remote monitoring and management of ASICs running the official version of the VNISH firmware.
https://vnish.us/vnish-monitoring-bot/

Instruction for using the Vnish monitoring bot in Telegram. Learn how to add ASIC miners, monitor their status, and receive notifications.

02/03/2025

Hashcore Toolkit 1.3.2 – More Stability, More Features!

We listened to your feedback and made Hashcore Toolkit even more ...

Hashcore Toolkit 1.3.2 boosts stability, usability, and compatibility with Vnish firmware, helping maximize Antminer performance and profitability.

01/23/2025

New release - VNISH firmware 1.2.6 rc4! https://vnish.group/en/bitmain/

📢 New Features:
- Added support for Antminer S21 Hydro model HHB68601

🚦 Improvements:
- Enhanced miner stability across the board
- Implemented various UI/UX enhancements for better user experience

🐞 Bug Fixes:
- Resolved an issue where fans were incorrectly marked as lost during initialization if the minimum fan speed was set to 0%
- Corrected sensor functionality during the resume process on Antminer L7
- Fixed autotuning issues for Antminer S21, Antminer T21, Antminer S21 Pro, Antminer S21 XP Imm,
Antminer S21 Imm, Antminer S21 XP, Antminer S21 Hydro, Antminer S21 XP Hydro,
Antminer S19k Pro, Antminer S19 XP, Antminer S19j XP, Antminer S19 XP Hydro,
Antminer S19e XP Hydro and Antminer T19 Pro Hydro
- Addressed incorrect chip hashrate display following frequency downgrades
- Fixed errors related to disabling profiles
- Resolved an issue where the top preset could appear lower than the current preset

Official Vnish firmware for Bitmain Antminer: increase productivity up to 25%, reduce consumption up to 15%. Download Vnish firmware.

01/06/2025

❗️Compensation for all users

Hello everyone! We have decided to compensate all our users for any potential inconveniences caused by the recent DevFee outage. From January 6th to January 12th, 2025, DevFee will be canceled for all users. During this period, you can use our firmware absolutely free! The updated version of the firmware 1.2.6 rc3 can be downloaded from our website https://vnish.group/en/bitmain .

We sincerely thank you for your trust and continued support. We hope that this compensation will demonstrate our commitment to providing quality service and our dedication to each user. If you have any questions or need further assistance, do not hesitate to contact our support team https://t.me/vnish_help .

01/02/2025

Attention: The problem with the availability of the DevFee pool has been solved in the latest firmware version 1.2.6-rc3.
Firmware is available on the website https://vnish.group/en/bitmain/. Clear your browser cache and download according to the model, platform and installation method