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Jetson Nano A02 fix - Сooler was not spin when overheated #16

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Jetson Nano A02 fix - Сooler was not spin when overheated #16

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a875efd
Jetson Nano A02 fix
d3dx13 Mar 2, 2022
e7b14bb
save int(float) and correct bounds
d3dx13 Mar 2, 2022
6a9dad9
added some debug (disabled)
d3dx13 Mar 2, 2022
aab9ad2
Restart=always
d3dx13-bot May 22, 2023
ca24d23
config for our jetson
May 22, 2023
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5 changes: 2 additions & 3 deletions automagic-fan.service
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Original file line number Diff line number Diff line change
Expand Up @@ -3,12 +3,11 @@ Description=Automagic fan control

[Service]
Type=simple
ExecStartPre=/bin/sleep 5
Restart=always
RestartSec=5
ExecStart=/usr/bin/python3 -u /usr/local/bin/automagic-fan/fanctl.py
ExecStopPost=/bin/sh -c '/bin/echo 0 > /sys/devices/pwm-fan/target_pwm'
User=root
StandardOutput=journal+console
Restart=always

[Install]
WantedBy=multi-user.target
3 changes: 2 additions & 1 deletion config.json
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Original file line number Diff line number Diff line change
Expand Up @@ -2,5 +2,6 @@
"FAN_OFF_TEMP":20,
"FAN_MAX_TEMP":50,
"UPDATE_INTERVAL":2,
"MAX_PERF":1
"MAX_PERF":1,
"INVERSED_PIN":false
}
7 changes: 6 additions & 1 deletion fanctl.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,12 +11,14 @@
FAN_MAX_TEMP=config["FAN_MAX_TEMP"]
UPDATE_INTERVAL=config["UPDATE_INTERVAL"]
MAX_PERF=config["MAX_PERF"]
INVERSED_PIN=config["INVERSED_PIN"]
except:
print("error loading /etc/automagic-fan/config.json.\nPlease check your config file.\nProceeding with default settings.")
FAN_OFF_TEMP=20
FAN_MAX_TEMP=50
UPDATE_INTERVAL=2
MAX_PERF=0
INVERSED_PIN=true

if MAX_PERF>0:
print("Maximizing clock speeds with jetson_clocks")
Expand All @@ -34,7 +36,10 @@ def read_temp():

def fan_curve(temp):
spd=255*(temp-FAN_OFF_TEMP)/(FAN_MAX_TEMP-FAN_OFF_TEMP)
return int(min(max(0,spd),255))
spd=int(min(max(0,spd),255))
# DEBUG
# print(255-spd if INVERSED_PIN else spd)
return 255-spd if INVERSED_PIN else spd

def set_speed(spd):
with open("/sys/devices/pwm-fan/target_pwm","w") as file:
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