updated espresso code to power down sensor

Author: jedgarpark

Espresso_Water_Meter/code.py

@@ -8,12 +8,13 @@
 
 import time
 import os
-import ssl
 import microcontroller
 import supervisor
+import ssl
 import socketpool
 import wifi
 import board
+import digitalio
 import alarm
 import neopixel
 import adafruit_hcsr04
@@ -22,6 +23,22 @@
 import adafruit_requests
 import adafruit_max1704x
 
+
+
+# Initialize the power pin for the sensor
+sensor_power = digitalio.DigitalInOut(board.A2)
+sensor_power.direction = digitalio.Direction.OUTPUT
+sensor_power.value = False  # Start with sensor powered off
+
+def power_sensor_on():
+    """Turn on power to the ultrasonic sensor and wait for it to stabilize."""
+    sensor_power.value = True
+    time.sleep(0.55)  # Give sensor time to power up and stabilize
+
+def power_sensor_off():
+    """Turn off power to the ultrasonic sensor."""
+    sensor_power.value = False
+
 # Initialize the sonar sensor
 sonar = adafruit_hcsr04.HCSR04(trigger_pin=board.A0, echo_pin=board.A1)
 
@@ -46,9 +63,9 @@
 
 # Operating hours (24-hour format with minutes, e.g., "6:35" and "16:00")
 OPENING_TIME = "6:00"
-CLOSING_TIME = "22:30"
+CLOSING_TIME = "15:30"
 # Normal operation check interval
-NORMAL_CHECK_MINUTES = 5
+NORMAL_CHECK_MINUTES = 10
 # Sleep duration in seconds during operating hours
 SLEEP_DURATION = 60 * NORMAL_CHECK_MINUTES
 # Display duration in seconds
@@ -58,12 +75,12 @@
 
 def parse_time(time_str):
     """Convert time string (HH:MM format) to hours and minutes."""
-    # pylint: disable=redefined-outer-name
     parts = time_str.split(':')
     return int(parts[0]), int(parts[1])
 
 def get_average_distance():
     """Take multiple distance readings and return the average."""
+    power_sensor_on()  # Power on the sensor before taking measurements
     distances = []
     for _ in range(NUM_SAMPLES):
         try:
@@ -73,6 +90,7 @@ def get_average_distance():
         except RuntimeError:
             print("Error reading distance")
             continue
+    power_sensor_off()  # Power off the sensor after measurements
 
     # Only average valid readings
     if distances:
@@ -103,9 +121,7 @@ def set_pixel_color(distance):
 avg_distance = get_average_distance()
 
 if avg_distance is not None:
-
     if avg_distance >= 22:
-        # pylint: disable=invalid-name
         avg_distance = 22
     print(f"Average distance: {avg_distance:.1f} cm")
     # Set color based on average distance
@@ -118,7 +134,6 @@ def set_pixel_color(distance):
 
     # Try connecting to WiFi
     try:
-
         print("Connecting to %s" % os.getenv("CIRCUITPY_WIFI_SSID"))
         # Show pink while attempting to connect
         pixel.fill(PINK)
@@ -127,7 +142,6 @@ def set_pixel_color(distance):
         # Show cyan on successful connection
         pixel.fill(CYAN)
         time.sleep(1)  # Brief pause to show the connection success
-    # pylint: disable=broad-except
     except Exception as e:
         print("Failed to connect to WiFi. Error:", e, "\nBoard will hard reset in 30 seconds.")
         pixel.fill(OFF)
@@ -160,7 +174,6 @@ def set_pixel_color(distance):
         aio_username = os.getenv("ADAFRUIT_AIO_USERNAME")
         aio_key = os.getenv("ADAFRUIT_AIO_KEY")
         timezone = os.getenv("TIMEZONE")
-        # pylint: disable=line-too-long
         TIME_URL = f"https://io.adafruit.com/api/v2/{aio_username}/integrations/time/strftime?x-aio-key={aio_key}&tz={timezone}"
         TIME_URL += "&fmt=%25Y-%25m-%25d+%25H%3A%25M%3A%25S.%25L+%25j+%25u+%25z+%25Z"
 
@@ -209,7 +222,6 @@ def set_pixel_color(distance):
             time.sleep(DISPLAY_DURATION)
 
             # Use normal check interval during operating hours
-            # # pylint: disable=invalid-name
             sleep_seconds = SLEEP_DURATION
             print(f"Next check in {NORMAL_CHECK_MINUTES} minutes")
         else:
@@ -233,7 +245,6 @@ def set_pixel_color(distance):
 
         response.close()
 
-    # pylint: disable=broad-except
     except Exception as e:
         print("Failed to get or send data, or connect. Error:", e,
               "\nBoard will hard reset in 30 seconds.")
@@ -244,14 +255,13 @@ def set_pixel_color(distance):
 else:
     print("Failed to get valid distance readings")
     pixel.fill(OFF)
-    # pylint: disable=invalid-name
     sleep_seconds = SLEEP_DURATION  # Use normal interval if we couldn't get readings
 
 # Prepare for deep sleep
 pixel.brightness = 0  # Turn off NeoPixel
+power_sensor_off()  # Make sure sensor is powered off before sleep
 
 # Flush the serial output before sleep
-# pylint: disable=pointless-statement
 supervisor.runtime.serial_bytes_available
 time.sleep(0.05)