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Converting a Helium Hotspot to a DeFli Ground Station
Whilst almost all Helium Hotspot manufacturer’s remain engaged in discussions to produce DeFli Ground Station’s there remains an elephant in the room…… board availability.
DeFli has a minimum production requirement of 2,000 units per batch, per manufacturer and acquiring either of Raspberry Pi 4 or RockPi boards in such quantity is proving difficult.
With this in mind, we at DeFli decided to utilise the abundance of unused/under-used Raspberry Pi and RockPi boards associated with the Helium Network (and actually any project with redundant devices).
What follows is a guide on how to use one of our kits to convert your Helium Hotspot (or A.N. Other “miner”) into a DeFli Ground Station along with an explanation of the differences between the options available.
Determining Your Board Type
The first step to take upon receiving your converter kit is to determine your board manufacturer. There are only two choices and so this should be relatively easy.
The options are:
Raspberry Pi
Rock Pi
Typically Rock Pi’s are found in Bobcat 300’s and the newer Nebra models.
SD Card or eMMC
The second step is to determine if your board boots from an SD Card or from eMMC (basically an on-board memory chip).
You can normally tell this from the manufacturer’s specification, but if you do not have access to this you can look for the presence of an eMMC chip on the compute module.
Flashing via SD
If your board has an SD card as opposed to eMMC then it is very simple to convert it to run the DeFli software. Simply insert the pre-flashed SD card that was included in your converter kit and reboot the board, it’s as easy as that. This is the same for both Raspberry Pi and RockPi devices.
Flashing via eMMC
If your board boots from eMMC then the process for flashing is slightly more complicated but still very easily accomplished.
Firstly you need to remove the compute module from the board, this should just lift off with a little tug.
Secondly you should then attach the compute module to the Waveshare adaptor that came with your converter kit.
Note that the Waveshare adaptor differs between Raspberry Pi and Rock Pi boards so make sure you order the correct converter kit!
Once the compute module is on the Waveshare adaptor you can connect the Waveshare adaptor to your PC or Laptop by USB.
Once connected follow these steps to flash your eMMC with the DeFli Image. This can be done using Mac OS or Windows, the process is the same.
Once this has completed you can remove the compute module from the Waveshare device and connect it back to the original board.
Connecting the ASD-B Receiver
The DeFli ASD-B receiver is a USB based device that connects directly in to one of the USB sockets on your Raspberry Pi or Rock Pi board.
The antenna included in the converter kit simply screws on to the end of the receiver device, alternatively you may use your own antenna. The antenna needs to DVB+T or ADS-B specific and must tune to 1090MHz (this is done automatically by the SDR).
LTE
As an option and to increase rewards for data transfer you can attach an LTE Modem module to the Raspberry Pi or Rock Pi board.
The Raspberry Pi LTE Hat attaches directly to the board using the GPIO Pins.
The Rock Pi Utilises a Quectel LTE Modem with a CM4 + LTE Carrier Board that connects directly to the Rock Pi board.
Attach the included U.FL antenna (or your own antenna) to the board and you are all set.
Note the LTE module is optional.
How Rewards Differ Based on Setup
The fundamental difference is that boards with LTE equipped will earn Data Transfer Rewards in addition to Proof of Signal and Block Rewards.
Non-LTE equipped devices will only earn Proof of Signal and Block Rewards.
That being said, LTE modules are easily added retrospectively.
The price for the conversion kit differs based on the board type and the specification (LTE or ADS-B only) and the price includes software fees and 12 months data on a SIM card (specific to your region).
Build Your Own
There does of course remain the option to build your own DeFli Ground Station. The fees for this are $79 for the software license and $42 for the onboarding cost.
Buy a conversion kit today!
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