The CFHDR-8U module should come with the latest firmware installed and ready to use. To reinstall or install a different version, please download a firmware release from the table below and follow the instructions.

1. Download the firmware file from the link above.
2. Press the BOOTSEL button while supplying power and connecting a USB cable to the CFHDR-8U module. It will show up as a removable drive called RPI-RP2 on your USB host.
3. Copy the firmware file to the removable drive. After copying the CFHDR-8U module will immediately reboot and begin running the new firmware.

CFHDR-8U - USB Interface to CFNET IO Modules