Raspberry Pi PiCoolFAN4 User Manual page 35

PiCoolFAN4 Firmware Code 0x14 Print Date 10.11.2019
not activated. Please follow exactly the Serial Port activation procedure described in our manual. Also
there is a strong recommendation, before you start doing boot loading, install and use this product to be
more familiar with it. Unfortunately many, many people the first think they are doing is to boatload of the
new firmware. That is definitely not the best approach of handling of a new unknown device, even it is
simple one.
During boot loading process system hang up (or for any reason and not completed uploading)
The implemented in the PiCoolFAN4 bootloader is very secure. If the bootloaded new firmware not
finished successfully, PiCoolFAN4 will not start. Will wait for repeated loading until completed properly.
The Green User LED will lit then. If something like that happen, then user need to repeat the bootloader
command without recalling (bootloader itself) it, like below. Remember to write the proper and current
firmware name instead this typed.
sudo python PCF4_serial0_9600_FU1.0.py -v -f PiCoolFAN.hex
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