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After building your device, you need a copy of EmbassyOS.
Visit the latest EmbassyOS release page on Github to download an image of EmbassyOS. It is eos.tar.gz.
Once you have the EmbassyOS image, you will need to flash it onto a microSD card.
Download balenaEtcher onto your Linux, Mac, or Windows computer.
Insert the microSD card into your computer, either directly or using an adapter.
Click “Select Image” and select your downloaded copy of EmbassyOS.
Click “Select Target” and select your 32GB microSD card.
Be certain you have selected the correct target microSD card. Whatever target you select will be completely erased and replaced with EmbassyOS.
Click “Flash!”. You may be asked to (1) approve the unusually large disk target or (2) enter your password. Both are normal.