Getting Started with COTX

Manage your COTX Helium hotspot mine remotely using Nebra and balenaCloud. For further information and features of this Firmware, please visit Nebra OpenFleet Overview

In this guide, we will show you a step-by-step overview of how to download and flash the Nebra Firmware to your COTX hotspot. 

What you will need

  • microSD card reader for laptop/computer
  • OS image file specifically of your COTX Hotspot (follow the steps)
  • Computer or Laptop (Windows or MAC)
  • COTX Hotspot 

Do not follow this guide if you have a different manufacturer of Hotspot.

Flashing your Helium Hotspot

Step 1 - First, you will need to remove the current microSD card inserted into your COTX miner. You can simply remove the microSD card from the TF slot on the front of the Hotspot with a small pair of tweezers.

Step 2 - Insert the microSD card either into an SD adaptor or if your memory card reader takes microSD directly, then insert that and connect it to your computer or laptop.

Step 3 - On your computer, download and install Balena Etcher from -

Once downloaded, open up the balenaEtcher program on your computer or laptop.

Step 4 - Before we move to the next step, you will need to download the latest OpenFleet software for your Hotspot, which you can find here -

Click on the link "COTX" on the left hand side of the page.

Click on file to download the Firmware.

Step 5 - Click on the Flash from File button in balenaEtcher and navigate to where you save your downloaded Firmware file. Select it to be installed.

In the middle button of balenaEtcher, click select target to select your SD card to install the OS (It may be selected automatically).

Finally, click on the Flash! button to begin installing the Firmware to your microSD card (you may need to type your login password here).

Step 6 - Once it has finished, you can now remove the SD card from its adaptor and card reader and then insert it back into the COTX hotspot.

Step 7 - Finally, connect your Ethernet cable to the hotspot and the power cable. The hotspot should now boot up with your new Firmware installed. It may take up to 30 minutes to do all the updates.

It would be best if you use Ethernet for the first initial boot of the hotspot

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