scripts/autofan.py: new, 20220813

1 files changed, 81 insertions, 0 deletions

diff --git a/scripts/autofan.py b/scripts/autofan.py
new file mode 100644
index 0000000..1072518
--- /dev/null
+++ b/scripts/autofan.py
@@ -0,0 +1,81 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+
+import lgpio, re, os, subprocess, logging
+from time import sleep
+
+
+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
+
+
+h = lgpio.gpiochip_open(0)
+channel = 14
+start_temp = 50
+end_temp = 43
+show_info = True
+is_high = False
+
+# 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.INFO)
+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)
+
+if os.path.exists("/usr/local/IS_HIGH_FLAG"):
+    lgpio.gpio_write(h, channel, 0)
+    logger.info("Fan started.")
+    os.remove("/usr/local/IS_HIGH_FLAG")
+
+try:
+    while True:
+        # temp = open('/sys/class/thermal/thermal_zone0/temp')
+        # temp = int(temp.read()) / 1000
+        temp, msg = check_CPU_temp()
+
+        if temp > start_temp and not is_high:  # 当SoC温度超过启动阈值且风扇处于关闭状态
+            lgpio.gpio_write(h, channel, 1)
+            logger.info("Fan started.")
+            logger.info(("Current %s") % msg)
+            show_info = True
+            is_high = True
+
+        elif temp < end_temp and is_high:  # 当SoC温度低于关闭阈值且风扇处于打开状态
+            lgpio.gpio_write(h, channel, 0)
+            logger.info("Fan stopped.")
+            logger.info(("Current %s") % msg)
+            is_high = 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.gpio_write(h, channel, 0)
+    logger.info("Fan stopped.")
+    lgpio.gpiochip_close(h)
+    logger.info("Controller Closed.")
+
+lgpio.gpiochip_close(h)
+logger.info("Controller Closed.")