changes to only send req when change

main.py

@@ -5,17 +5,21 @@ from machine import Pin, time_pulse_us
 
 DOOR_OPEN_THRESHOLD = 50 # in cm
 
-echo_pin = Pin(0, Pin.IN)
-trig_pin = Pin(1, Pin.OUT)
+echoPin = Pin(0, Pin.IN)
+trigPin = Pin(1, Pin.OUT)
+
+led = Pin("LED", Pin.OUT)
+
+prevDoorStatus = 67
 
 def getDistanceCM():
-    trig_pin.value(0)
+    trigPin.value(0)
     time.sleep_us(2)
-    trig_pin.value(1)
+    trigPin.value(1)
     time.sleep_us(10)
-    trig_pin.value(0)
+    trigPin.value(0)
 
-    pulse_time = time_pulse_us(echo_pin, 1, 30000)
+    pulse_time = time_pulse_us(echoPin, 1, 30000)
     
     if pulse_time < 0:
         return -1 
@@ -29,6 +33,8 @@ def sendDoorStatus(status):
     #r = urequests.post(requestURL, data={"status", status})
 
 def checkDoorDistance():
+    global prevDoorStatus # Tell Python to use the global variable
+    
     dist = -1
     timeoutTime = 10
     while timeoutTime > 0 and dist == -1:
@@ -36,13 +42,26 @@ def checkDoorDistance():
         timeoutTime -= 1
         time.sleep(1)
 
+    status = 0;
     if dist < DOOR_OPEN_THRESHOLD:
-        sendDoorStatus(1) # door open
+        status = 1 # door open
+        led.on()
     elif dist == -1:
-        sendDoorStatus(-1) # unknown
+        status = -1 # unknown
     else:
-        sendDoorStatus(0) # door closed
+        status = 0 # door closed
+        led.off()
 
+    if status != prevDoorStatus:
+        sendDoorStatus(status)
+        prevDoorStatus = status
+
+def flashLED():
+    flashes = 10
+    while flashes > 0:
+        led.toggle()
+        time.sleep_ms(500)
+        flashes -= 1
 
 def connectToNet():
     ssid = "ITRnet"
@@ -63,6 +82,7 @@ def connectToNet():
     if wlan.status() != 3:
         raise RuntimeError('network connection failed')
     else:
+        flashLED()
         print('connected!')
         status = wlan.ifconfig()
         print('ip = ' + status[0])