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ASIC.TOOLS / FIRMWARE

Download MicroBT Whatsminer M21S Firmware

Download official firmware for MicroBT Whatsminer M21S. Versions: 1. Local downloads, hardware compatibility, file sizes and SHA-256 checksums.

MicroBT Whatsminer M21S

Firmware is hardware-specific. Match the exact model and control-board revision, back up settings, use stable power, test one miner first, and never interrupt an upgrade. A wrong image can make the controller unbootable.

Available versions

1 version
Official family firmwareOfficial source: WhatsMiner Firmware Download ↗
Version

20220919.15

Whatsminer-M2x-all-20220919.15.bin

Download firmware↓ 18.2 MB
Published / updated
2023-02-19
Compatibility
M2x series
Size
18.2 MB
Check file integrity · SHA-256

SHA-256

5d93927db6c3c086e0940e78c66a6151bc4cc943c2152a4b4b1b3b68763692e4

MD5

f09aa7604a399c14a5707fa3aed97d12

Verify the downloaded file with SHA-256 before uploading it to a miner.

Release notes

1. Applicable mode 1.1 M21S, M20S, M21,etc; 1.2 High mode can not be supported; 1.3 Teaching video: https://youtu.be/L-gpDzD9YCU 2. New version highlights 2.1 Support Pool TLS safety transportation protocol; 2.2 If the miner firmware is before 2021, it is recommended to upgrade the firmware after SD-card flashing; 2.3 Strengthen the safety of firmware: device will reboot 2 times during upgrading,the version name will be end with"NeedUpgradeAgain" at 1st time，please wait for 2nd reboot, after that it will be changed to target version; 2.4 Fixing other bugs; 2.5 Online upgrading to version earlier than 20210602 is prohibit， suggest to match with tool whatsminertool-8.1.34 ; 2.6 The WhatsMiner API version is V2.0.5;

Official source ↗

Sources checked 14 September 2026