Board: RPi-4b/Zero4/Rpi-Zero-2W
Prerequisites
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Before flashing an RPI module with KOS Bootloader, ensure your Mac or Windows machine has the necessary software installed.
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For macOS, please refer to Prerequisites for macOS
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For Windows, please refer to Prerequisites for Windows
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You will also need the following hardware.
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A Windows or Mac machine with a microSD card reader
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A Raspberry PI-4 Model B with power supply.
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OR Raspberry PI-0-2W with power supply.
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OR Tier One Zero4 board with power supply.
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A Micro SD card for flashing the KOS bootloader.
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An HDMI monitor, keyboard, and ethernet cable that you’ll connect to the RPi board.
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Step 1: Download the KOS Bootloader
Navigate to the KOSDev Download Page and select the correct bootloader.
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If you use Safari to download the file, the file is automatically unarchived, and the *.img file will be in the download location.
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On other browsers, you will use the *.img.gz file for flashing.
Step 2: Prepare the Micro SD card
Insert the Micro SD card into the card reader and connect it to your computer.
Step 3: Flash the Bootloader onto the SD Card
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Start the Disk imaging software (Balena Etcher or RPi Imager) installed in the machine.
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Locate and select the '.img' or '.img.gz' file and then select the inserted SD card.
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Follow instructions Balena Etcher or RPi Imager to flash the image to the SD card.
Step 4: Verify installation
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Turn off the power to the board.
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Insert the SD card into the board.
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Connect the USB keyboard and HDMI monitor.
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Connect the Ethernet cable to the board.
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Power up the board and wait for a few seconds to boot up.
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The screen should show “Node Manager,” and the IP should be displayed.
