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===How to start PWM fan when pi 4 boots===
But we hope that the script can be executed automatically when the Raspberry Pi board boots, we can use crontab system command to achieve it. please refer to the following
sudo crontab -e
Choose "1" then press Enter
Add a line at the end of the file that reads like this:
@reboot python /home/pi/fan.py
Please note the path of this file.
Save and exit (CTRK + O and ENTER to save it). In nano editor, you do that by hitting CTRL + X, answering Y and hitting Enter when prompted.
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python /home/admin/x-c1/fan.py&
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