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Add fan control service

master
KemoNine 2 years ago
parent
commit
638bd93675
  1. 1
      .drone.yml
  2. 3
      cmd/fan/README.md
  3. 99
      cmd/fan/fan.go

1
.drone.yml

@ -30,6 +30,7 @@ steps:
- go build -o out/wifi cmd/wifi/wifi.go
- go build -o out/inotify cmd/inotify/inotify.go
- go build -o out/gui cmd/gui/gui.go
- go build -o out/fan cmd/fan/fan.go
- cp CHANGELOG.md out/
- name: gitea-release
image: plugins/gitea-release

3
cmd/fan/README.md

@ -0,0 +1,3 @@
# Fan
A simple utility to control the [Argon Fan](https://www.argon40.com/argon-fan-hat-for-raspberry-pi-4-raspberry-pi-3b-and-raspberry-pi-3-b.html) speed based on CPU/GPU temperatures.

99
cmd/fan/fan.go

@ -0,0 +1,99 @@
package main
import (
"log"
"os"
"os/signal"
"syscall"
"time"
argonFan "git.sungo.io/sungo/argon/fan"
"git.kemonine.info/PiFrame/utils"
)
const (
BUS = 1
ADDRESS = 0x1a
)
const (
POLL_INTERVAL = "1m"
SPEED_OFF_TEMP = 40.0
SPEED_TWENTY_FIVE_PERCENT_TEMP = 45.0
SPEED_FIFTY_PERCENT_TEMP = 50.0
SPEED_SEVENTY_FIVE_PERCENT_TEMP = 55.0
SPEED_FULL_TEMP = 57.0
)
func main() {
// Setup fan and bail if we can't see it
fan, err := argonFan.New(ADDRESS, BUS)
if err != nil {
log.Fatalf("Error working with fan : %s", err)
}
// Safe exit
defer fan.SafeClose()
sigc := make(chan os.Signal, 1)
signal.Notify(
sigc,
syscall.SIGHUP,
syscall.SIGINT,
syscall.SIGTERM,
syscall.SIGQUIT,
)
go func() {
<-sigc
fan.SafeClose()
os.Exit(1)
}()
// Control fan speed based on temps via a ticker / timeout
pollInterval, err := time.ParseDuration(POLL_INTERVAL)
if err != nil {
log.Fatalf("Error parsing interval duration : %s", err)
}
ticker := time.NewTicker(pollInterval)
go func() {
for {
select {
case <-ticker.C:
cpuTemp := utils.GetCPUTemp()
gpuTemp := utils.GetGPUTemp()
if cpuTemp >= SPEED_FULL_TEMP || gpuTemp >= SPEED_FULL_TEMP {
fan.SetSpeed(100)
continue
}
if cpuTemp >= SPEED_SEVENTY_FIVE_PERCENT_TEMP || gpuTemp >= SPEED_SEVENTY_FIVE_PERCENT_TEMP {
fan.SetSpeed(75)
continue
}
if cpuTemp >= SPEED_FIFTY_PERCENT_TEMP || gpuTemp >= SPEED_FIFTY_PERCENT_TEMP {
fan.SetSpeed(50)
continue
}
if cpuTemp >= SPEED_TWENTY_FIVE_PERCENT_TEMP || gpuTemp >= SPEED_TWENTY_FIVE_PERCENT_TEMP {
fan.SetSpeed(25)
continue
}
if cpuTemp <= SPEED_OFF_TEMP || gpuTemp <= SPEED_OFF_TEMP {
fan.SetSpeed(0)
continue
}
// We should never get here but...
fan.SetSpeed(100)
}
}
}()
// Infinate loop of sleeps to let ticker do it's job working with fan speed
sleepInterval, err := time.ParseDuration("5m")
if err != nil {
log.Fatalf("Error parsing sleep interval : %s", err)
}
for {
time.Sleep(sleepInterval)
}
}
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