From d119b30d562f67f977537ee7895f7fbce72c3479 Mon Sep 17 00:00:00 2001
From: Chris Smith <kemenril@users.noreply.github.com>
Date: Fri, 10 Jun 2022 00:30:30 +0000
Subject: [PATCH] New fan_loop function which starts the fan when the
 temperature reaches the threshold and doesn't stop it until the temperatue is
 a bit lower than the threshold.  Also lowered the threshold a bit.

---
 .../temp_fan_daemon_a06.py                     | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/Code/devterm_fan_daemon_cpi_a06/temp_fan_daemon_a06.py b/Code/devterm_fan_daemon_cpi_a06/temp_fan_daemon_a06.py
index f84af2a..7267a6e 100755
--- a/Code/devterm_fan_daemon_cpi_a06/temp_fan_daemon_a06.py
+++ b/Code/devterm_fan_daemon_cpi_a06/temp_fan_daemon_a06.py
@@ -10,9 +10,11 @@ cpus = []
 mid_freq = 0
 max_freq = 0
 
-MAX_TEMP=70000
+MAX_TEMP=60000
 ONCE_TIME=30
 
+lastTemp = 0
+
 gpiopath="/sys/class/gpio"
 gpiopin=96
 def init_fan_gpio():
@@ -82,8 +84,8 @@ def set_performance(scale):
         #print(_f)
         subprocess.run( "echo %s | sudo tee  %s" %(freq,_f),shell=True)
   
-
 def fan_loop():
+    global lastTemp
     while True:
         temps = glob.glob('/sys/class/thermal/thermal_zone[0-9]/')
         temps.sort()
@@ -93,12 +95,18 @@ def fan_loop():
             _t = open(_f).read().strip("\n")
             if isDigit(_t):
                 if int(_t) > MAX_TEMP:
+                    if lastTemp <= MAX_TEMP:
+                        sys.stderr.write("Temp: " + str(_t) + "  Fan on.\n")
                     fan_on()
-                    fan_off()
-        
+                else:
+                    #Don't turn it off right at the threshold
+                    if int(_t) + 2000 < MAX_TEMP:
+                        if lastTemp +  2000 >= MAX_TEMP:
+                            sys.stderr.write("Temp: " + str(_t) + "  Fan off.\n")
+                        fan_off()
+            lastTemp = int(_t)
         time.sleep(5)
 
-
 def main(argv):
     global cpus
     scale = 'mid'