Antminer Firmware Flash OTG Card Reader

When your Antminer's control board is bricked or needs a firmware update, flashing new firmware can be a challenge without the right tools. Our Antminer Firmware Flash OTG Card Reader offers a plug-and-play solution to get you back up and running fast. This 3-in-1 adapter features USB-C, Micro-USB, and USB-A connectors all in one device, so you can connect directly to your miner’s OTG port without extra cables or hassle. Even better, it comes with a 512 MB microSD card preloaded with the correct recovery firmware for Amlogic-based Antminers (e.g. S21 Pro, S21+, S21 XP and more).

No complex equipment needed 💡 – just insert the preloaded card, plug the adapter into the control board’s OTG port, and power on your miner to initiate the firmware flash. Each adapter is 100% tested and the same tool our technicians use in-house for firmware flashing during control board repair jobs, so you can trust it to work reliably when you need it most.

🔧 Features

• Universal 3-in-1 Adapter: USB-C, Micro-USB, and USB-A connectors integrated into one reader for maximum compatibility and easy plug-and-play use.
• Preloaded Firmware Card: Includes a 512 MB microSD card pre-flashed with the correct Antminer recovery firmware – no manual downloads or setup required.
• Broad Compatibility: Compatible with Antminer S21 Pro, S21+, S21 XP, and all models using Amlogic-based control boards for firmware (re)flashing.
• Proven Reliability: Used extensively by our repair team, each adapter is thoroughly tested to ensure it performs flawlessly for critical firmware recovery tasks.
• Budget-Friendly: Priced at only $25 + shipping, it’s an affordable must-have tool to minimize downtime and avoid costly repairs.

What’s Included

• 3-in-1 USB OTG Card Reader (USB-C, Micro-USB, USB-A connectors)
• 512 MB MicroSD Card (preloaded with Antminer firmware)

Have questions or need help with firmware recovery?
Contact us → and our team will be happy to assist you in getting your miner back online.