HashCore Docs
Installation, Update, Removal

Update

You can update the firmware on Antminer L7/L9, S19, and S21 series devices in two ways:

1. Via the Device Web Interface (OTA Update)

Used for quickly updating a single miner.

  1. Open the web interface and click the "Firmware Update" button in the left sidebar menu.
  2. If necessary, activate the "Save current miner configuration" toggle to preserve current Pool, Overclocking, and network settings after the update.
  3. Drag the firmware file (.tar.gz) into the upload area or click on it to select the file from your computer.
  4. Click the now active "Flash miner" button and wait for the process to complete and the device to restart.

Attention! It is strictly forbidden to power off the device or disconnect the network cable during firmware updates. This may lead to bootloader corruption.

For more details on update window parameters, see Firmware Update Center.

2. Via HashCore Toolkit (Batch Update)

Used for simultaneously updating multiple devices or an entire farm:

  1. Launch HashCore Toolkit and select a group of miners.
  2. In the bottom panel, select "All Operations → Firmware Installation".
  3. Specify the directory containing the downloaded firmware package and confirm to start the batch update.