Added Pet Bowl Guide code

Author: makermelissa

FunHouse_Pet_Bowl_Sensor/code.py

@@ -0,0 +1,116 @@
+# SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries
+# SPDX-FileCopyrightText: Copyright (c) 2021 Melissa LeBlanc-Williams for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+import digitalio
+import analogio
+from adafruit_display_shapes.circle import Circle
+from adafruit_funhouse import FunHouse
+
+BOWL_STATE_TOPIC = "funhouse/catbowl/state"
+LOW_VALUE = 4000
+EMPTY_VALUE = 2000
+UPDATE_INTERVAL = 1800	# Every 30 minutes
+
+try:
+    from secrets import secrets
+except ImportError:
+    print("WiFi secrets are kept in secrets.py, please add them there!")
+    raise
+
+# Text labels for the Display
+states = {
+    "empty": "Add Water",
+    "low": "Low",
+    "full": "Full",
+}
+
+def publish_bowl_state(bowl_state):
+    funhouse.peripherals.led = True
+    # Publish the Bowl Level State
+    print("Publishing to {}".format(BOWL_STATE_TOPIC))
+    funhouse.network.mqtt_publish(BOWL_STATE_TOPIC, bowl_state)
+    funhouse.peripherals.led = False
+
+def connected(client, userdata, result, payload):
+    status.fill = 0x00FF00
+    status.outline = 0x008800
+
+def disconnected(client):
+    status.fill = 0xFF0000
+    status.outline = 0x880000
+
+def get_bowl_reading():
+    water_enable.value = True
+    level = water_level_sensor.value
+    water_enable.value = False
+    return level
+
+def get_bowl_state(level):
+    if level <= EMPTY_VALUE:
+        return "empty"
+    elif level <= LOW_VALUE:
+        return "low"
+    return "full"
+
+def bowl_level_display(water_level):
+    if funhouse.peripherals.button_sel:
+        return water_level
+    return states[get_bowl_state(water_level)]
+
+# Set Initial States
+funhouse = FunHouse(default_bg=0x0F0F00)
+funhouse.peripherals.dotstars.fill(0)
+water_enable = digitalio.DigitalInOut(board.A0)
+water_enable.switch_to_output()
+water_level_sensor = analogio.AnalogIn(board.A1)
+funhouse.display.show(None)
+funhouse.add_text(
+    text="Bowl Level:",
+    text_position=(120, 60),
+    text_anchor_point=(0.5, 0.5),
+    text_color=0xFF0000,
+    text_font="fonts/Arial-Bold-24.pcf",
+)
+level_label = funhouse.add_text(
+    text_position=(120, 100),
+    text_anchor_point=(0.5, 0.5),
+    text_color=0xFFFF00,
+    text_font="fonts/Arial-Bold-24.pcf",
+)
+funhouse.display.show(funhouse.splash)
+
+status = Circle(229, 10, 10, fill=0xFF0000, outline=0x880000)
+funhouse.splash.append(status)
+
+# Initialize a new MQTT Client object
+funhouse.network.init_mqtt(
+    secrets["mqtt_broker"],
+    secrets["mqtt_port"],
+    secrets["mqtt_username"],
+    secrets["mqtt_password"],
+)
+funhouse.network.on_mqtt_connect = connected
+funhouse.network.on_mqtt_disconnect = disconnected
+
+print("Attempting to connect to {}".format(secrets["mqtt_broker"]))
+funhouse.network.mqtt_connect()
+
+last_reading_timestamp = None
+last_bowl_state = None
+
+while True:
+    if last_reading_timestamp is None or time.monotonic() > last_reading_timestamp + UPDATE_INTERVAL:
+        # Take Reading
+        water_level = get_bowl_reading()
+        # Update Display
+        funhouse.set_text(bowl_level_display(water_level), level_label)
+        # If changed, publish new result
+        bowl_state = get_bowl_state(water_level)
+        if bowl_state != last_bowl_state:
+            publish_bowl_state(bowl_state)
+            last_bowl_state = bowl_state
+        last_reading_timestamp = time.monotonic()