hello, paul Thank you for your reply! I've read the "phosphor-pid-control ". But I didn't read about the linked between temperature and current. could you give me an example? Thanks! On 11/25/2021 16:46，Paul Fertser wrote： Hello, On Thu, Nov 25, 2021 at 04:29:23PM +0800, Landon wrote: Can it be linked with temperature and current? Whether the pwm-fan output can be controlled by the corresponding temperature and current? Are there any instructions or references? https://github.com/openbmc/phosphor-pid-control should be flexible enough for the purpose. Is it missing something you need? -- Be free, use free (http://www.gnu.org/philosophy/free-sw.html) software! mailto:fercerpav@gmail.com