Added thread locking instead of variable lock

PC_CONTROL_CODE/dockerInflux/mainDocker.py

@@ -28,7 +28,9 @@ TEMPREADINTERVAL = float(os.getenv("TEMPREADINTERVAL", 15))
 
 TEMPSETING = bool(os.getenv("TEMPSETING", True))
 
-PROCESSTEMPWAITTIME = float(os.getenv("PROCESSTEMPWAITTIME"), 0.75) 
+PROCESSTEMPWAITTIME = float(os.getenv("PROCESSTEMPWAITTIME", 0.75)) 
+
+BACKOFFTIME = float(os.getenv("BACKOFFTIME", 0.1))
 
 # INFLUXDB config
 # token = "apg1gysUeCcxdcRTMmosJTenbEppmUNi9rXlANDB2oNadBdWAu2GVTDc_q_dyo0iyYsckKaOvPRm6ba2NK0y_A=="
@@ -60,7 +62,7 @@ MDserial = serial.Serial(
 lastTempReading = time.time() 
 MDtempDict = {}
 MDict = {}
-currentSerialUsage = False
+currentSerialUsage = threading.Lock()
 fluxSending = False
 currentTime = 0
 lastTempReading = 0
@@ -73,15 +75,15 @@ write_api = inflxdb_client.write_api(write_options=SYNCHRONOUS)
 
 
 def getTemp():
-    global MDict, fluxSending, currentSerialUsage
+    global MDict, fluxSending
 
-    currentSerialUsage = True
     
-    MDserial.write(f"{GETTMPCMND}\n\r".encode())
-    time.sleep(1)
-    MDreturning = MDserial.read_until(" >").decode()
+    with currentSerialUsage:
+        MDserial.write(f"{GETTMPCMND}\n\r".encode())
+        time.sleep(1)
+        MDreturning = MDserial.read_until(" >").decode()
+
     
-    currentSerialUsage = False
 
     # MDict = {}
 
@@ -142,7 +144,6 @@ def getTemp():
 
 
 def setSpeed(inSpeeDict: dict):
-    global currentSerialUsage
 
     bpavrg = 0
     # default
@@ -154,23 +155,21 @@ def setSpeed(inSpeeDict: dict):
         outfanprcntg = int((bpavrg / (HIGH_FAN_TRSHD - LOW_FAN_TRSHD)) * TEMP_FACTOR)
         # os.system(f"echo setting {outfanprcntg}%")
 
-    currentSerialUsage = True
+    with currentSerialUsage:
 
-    # Set fan speed
-    if outfanprcntg >= 20:
-        MDserial.write((f"{SETFANCMND} {str(outfanprcntg)} \n\r").encode())  
-        print(f"setting {outfanprcntg}%", flush=True)
+        # Set fan speed
+        if outfanprcntg >= 20:
+            MDserial.write((f"{SETFANCMND} {str(outfanprcntg)} \n\r").encode())  
+            print(f"setting {outfanprcntg}%", flush=True)
 
-        currentSerialUsage = False
-        return 0
-    else:
-        # Set default value
-        MDserial.write((f"{SETFANCMND} {str(DEFOUTPRCNTG)} \n\r").encode())  
+            return 0
+        else:
+            # Set default value
+            MDserial.write((f"{SETFANCMND} {str(DEFOUTPRCNTG)} \n\r").encode())  
+
+            return 1
     
-        currentSerialUsage = False
-        return 1
     
-    currentSerialUsage = False
     # If something goes super wrong
     return -1
 
@@ -233,7 +232,7 @@ lastTempReading = time.time()
 
 def mainCodeHere():
     while True:
-        global MDict, fluxSending, currentTime, lastTempReading, currentSerialUsage
+        global MDict, fluxSending, currentTime, lastTempReading
         # https://stackoverflow.com/questions/52578122/not-able-to-send-the-enter-command-on-pyserial
 
         # get temperature data, wait for MD1200 to answer and store 
@@ -241,6 +240,7 @@ def mainCodeHere():
         currentTime = time.time()
 
         if currentTime - lastTempReading >= TEMPREADINTERVAL:
+
             getTemp()    
             lastTempReading = currentTime
         
@@ -270,11 +270,11 @@ def mainCodeHere():
         else:
             print(f"temperature not yet pulled.\nFalling back do default fan speed", flush=True)
             # os.system(f"echo temperature not yet pulled.\nFalling back do default fan speed")
-            currentSerialUsage = True
             
-            MDserial.write((f"{SETFANCMND} {str(DEFOUTPRCNTG)} \n\r").encode()) 
+            with currentSerialUsage:
+                MDserial.write((f"{SETFANCMND} {str(DEFOUTPRCNTG)} \n\r").encode()) 
+
             
-            currentSerialUsage = False
 
         time.sleep(EPPYSLEEPY)