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#!/usr/bin/python3
# -*- coding: utf-8 -*-
import lgpio, re, os, subprocess, logging
from time import sleep
from pathlib import Path
def check_CPU_temp():
t = 0
err, msg = subprocess.getstatusoutput(
"/usr/bin/zsh -c 'LD_LIBRARY_PATH=/opt/vc/lib /opt/vc/bin/vcgencmd measure_temp'"
)
if not err:
m = re.search(r"-?\d\.?\d*", msg) # a solution with a regex
try:
t = int(m.group())
except ValueError: # catch only error needed
pass
return t, msg
def HIGH_FLAG_callback(old, new):
if new:
lgpio.gpio_write(h, channel, 1)
logger.info("Fan started.")
Path(flag_file).touch()
logger.debug(("Wrote flag: %s") % flag_file)
logger.info(("Current %s") % msg)
else:
lgpio.gpio_write(h, channel, 0)
logger.info("Fan stopped.")
os.remove(flag_file)
logger.debug(("Deleted flag: %s") % flag_file)
logger.info(("Current %s") % msg)
class VariableListenedOnChange:
def __init__(self, init_value):
self._value = init_value
self._callbacks = []
@property
def value(self):
return self._value
@value.setter
def value(self, new_value):
old_value = self._value
self._value = new_value
for callback in self._callbacks:
callback(old_value, new_value)
def register_callback(self, callback):
self._callbacks.append(callback)
# Logger setup
logger = logging.getLogger()
logger.setLevel(level=logging.INFO)
formatter = logging.Formatter("%(asctime)s %(levelname)s %(message)s")
streamHandler = logging.StreamHandler()
streamHandler.setLevel(logging.DEBUG)
streamHandler.setFormatter(formatter)
fileHandler = logging.FileHandler("/var/log/autofan.log", mode="w")
fileHandler.setLevel(logging.INFO)
fileHandler.setFormatter(formatter)
logger.addHandler(streamHandler)
logger.addHandler(fileHandler)
h = lgpio.gpiochip_open(0)
channel = 14
start_temp = 50
end_temp = 43
show_info = True
flag_file = "/usr/local/IS_HIGH_FLAG"
is_high = VariableListenedOnChange(False)
is_high.register_callback(HIGH_FLAG_callback)
if os.path.exists(flag_file):
lgpio.gpio_write(h, channel, 0)
logger.info("Got IS_HIGH_FLAG, stopping fan for now just in case.")
os.remove(flag_file)
try:
while True:
temp = open("/sys/class/thermal/thermal_zone0/temp")
temp = int(temp.read()) / 1000
msg = "%.1f ℃" % temp
# temp, msg = check_CPU_temp()
if temp > start_temp and not is_high.value: # 当SoC温度超过启动阈值且风扇处于关闭状态
is_high.value = True
show_info = True
elif temp < end_temp and is_high.value: # 当SoC温度低于关闭阈值且风扇处于打开状态
is_high.value = False
show_info = True
elif show_info:
logger.info("Nothing to do, Skipping now...")
logger.info(("Current %s") % msg)
show_info = False
sleep(10) # 每隔10秒监控一次
except:
lgpio.gpiochip_close(h)
logger.info("Controller Closed.")
lgpio.gpiochip_close(h)
logger.info("Controller Closed.")
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