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Antminer 21 Series Firmware Download

Antminer 21 Series Firmware Download

Created 2024/03/05　 Updated 2026/01/06

Update the corresponding firmware to solve the operating faults of Antminer S21, S21 hyd, T21 and other miners. By flashing the firmware and programming the correct operating procedures, you can effectively extend the service life of the miner and obtain more mining profits.

Miner model

File name
File sizeDescriptionPublish dateAction
Antminer S21+ firmwareFR-1.15(250422-S21+).bmu15.62MB

MD5:9c3d761ed5c98425e4879bae9f26fd48

Updates：

1. Optimized firmware.

Please make sure the miner type and firmware type are the same before upgrading the miner firmware.

2025-05-14Download
Antminer S21+ Hydro firmware
FR-1.23(251024-S21+ Hyd.).bmu30.04MB

MD5:c345d7d32b7af85d44ad1ef61b40220c

Updates：

1. Optimized firmware.

Please make sure the miner type and firmware type are the same before upgrading the miner firmware.

2025-11-12Download
Antminer S21 XP Imm firmwareFR-1.38(251031-S21XP-Imm).bmu15.97MB

MD5:eb88d140ee037e244d07291e1cb6000d

1. Optimized firmware.

Please make sure the miner type and firmware type are the same before upgrading the miner firmware.

2025-11-12Download
Antminer S21e XP Hydro firmwareAntminer-S21e-XP-Hyd.-release-202501061507.bmu
17.31MB

MD5:f17de768d5a84257ece9b91b7152c247

ANTMINER S21e XP Hyd. initial firmware.

Please make sure the miner type and firmware type are the same before upgrading the miner firmware.

2025-01-16Download

Antminer S21 XP Hydro firmware

Antminer-S21-XP-Hyd.-release-202501061507.bmu17.31MB

MD5:f17de768d5a84257ece9b91b7152c247

Updates：

1. Optimized firmware.

Please make sure the miner type and firmware type are the same before upgrading the miner firmware.

2025-01-16Download
Antminer S21 XP firmwareFR-1.104(251202-S21-XP).bmu16.00MB

MD5:f044e61727eb310f99c79bc1c3aa4e81

1. Optimized firmware.

Please make sure the miner type and firmware type are the same before upgrading the miner firmware.

2025-12-30Download
Antminer S21Imm firmwareAntminer-S21Imm-AML-release-202408061155.bmu14.42MB

MD5:92f7f01581c49f0d3742b2ce4029d991

ANTMINER S21 lmm. initial firmware.

Please make sure the miner type and firmware type are the same before upgrading the miner firmware.

2024-08-12Download
Antminer S21 Hydro firmware
FR-1.1(250416-S21 Hyd.).bmu17.32MB

MD5:524dcfdced9927b89d28e637b100354a

Updates：

1. Optimized firmware.

Please make sure the miner type and firmware type are the same before upgrading the miner firmware.

2024-06-25Download
Antminer T21 firmwareFR-1.20(251113-T21).bmu44.69MB

MD5:518f735ca49e7e0d7cb6e8d7ceb26610

Updates：

1. For the machines that may shut down due to high temperatures, some optimization strategies, such as frequency reduction, are implemented, which may cause a loss of computing hashrate.

2. Optimized the stability of mining machines under low ambient temperature conditions.

Please make sure the miner type and firmware type are the same before upgrading the miner firmware.

2025-11-18Download
Antminer S21 firmwareFR-1.12(251009-S21).bmu15.21MB

MD5:45c6e3f115a05fa3e6a4a823d9fa500f

Updates：

1. Implemented slight frequency reduction and other optimization strategies for machines that may shut down due to high temperatures.

2. Enhance the stability of the firmware.

Please make sure the miner type and firmware type are the same before upgrading the miner firmware.

2025-11-20Download
Antminer S21 Pro firmwareFR-1.96(251224-S21-Pro).bmu16.00MB

MD5:4113870fbd081ac962f8de6d90416bcb

Updates：

1. Optimized firmware.

Please make sure the miner type and firmware type are the same before upgrading the miner firmware.

2026-01-04Download

Firmware download for SD card:

Miner modelFile nameFile sizeDescriptionPublish dateAction
Antminer S21 firmwareS21-aml-flashcard.zip24.50MB

SD firmware for S21 AML control board.

After flashing the firmware with the SD card, please upgrade to the latest official firmware.

2024-02-26Download
Antminer T21 firmwaret21-flash-card-7007.zip27.11MBT21 7007 Flash card package.2024-03-28Download
Antminer T21 firmwaret21-flash-card-aml.zip24.49MBT21 amlogic Flash card package.2024-03-28Download
Antminer T21 firmwaret21-sd2nand-cvctrl-202403221534.tar.gz16.84MBT21 cvctrl Flash card package.2024-03-28Download
Antminer S21 Hydro firmwareS21-hyd-flash-card-7007.zip27.13MBS21 Hydro 7007 Flash card package.2024-04-09Download

NOTICE
This is an original piece. Reproduction in whole or part without written permission is prohibited.

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