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main.py

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+import time
+import uasyncio as asyncio
+import machine
+import gc
+import neopixel
+
+from config import *
+from wifi import connect_wifi
+from timeutil import setup_rtc
+from sensors import Sensors
+from display import OLED
+from webserver import WebServer
+
+
+# Set CPU speed
+machine.freq(CPU_FREQ)
+
+#HOSTNAME = "Testname"
+
+# Connect WiFi
+print("Version = ", VERSION)
+print("Hostname = ", HOSTNAME)
+wlan = connect_wifi(SSID, PASSWORD, HOSTNAME)
+rtc = setup_rtc(TZ_OFFSET)
+print("Server running on http://" + wlan.ifconfig()[0])
+
+#TANK_CAPACITY_L = 3000
+print("Heart Beat =", HEARTBEAT)
+print("Tank Volume =", TANK_CAPACITY_L)
+# Init sensors and display
+sensors = Sensors()
+if DISPLAY_ON:
+    oled = OLED()
+
+sensors.test_pin1.on()
+sensors.test_pin2.on()
+sensors.test_pin0.on()
+# Capture boot time
+start_time = time.time()
+
+# print("Boot timestamp:", start_time)
+
+# Set tank full reference from current reading at boot
+
+#MAX_PRESSURE_KPA = sensors.read_pressure()
+time.sleep_ms(250)
+sensors.test_pin1.off()
+sensors.test_pin2.off()
+sensors.test_pin0.off()
+
+print("✔ Config loaded.")
+print("Initial MAX_PRESSURE_KPA =", MAX_PRESSURE_KPA, "KPA")
+print("Initial Known Depth =", KNOWN_DEPTH_M, "m")
+#print("Initial Known Pressure =", MAX_PRESSURE_KPA)
+
+def rssi_percent():
+    rssi = wlan.status("rssi")
+    rssi = max(-100, min(-50, rssi))
+    return int((rssi + 100) * 2)
+
+class HeartbeatFadeNeoPixel:
+    def __init__(self, neopixel_obj, pixel_index=0, color=(255, 0, 0),
+                 min_brightness=5, max_brightness=100,
+                 step=2, interval_ms=20):
+
+        self.np = neopixel_obj
+        self.index = pixel_index
+        self.color = color
+
+        self.min_brightness = min_brightness
+        self.max_brightness = max_brightness
+        self.step = step
+        self.interval = interval_ms
+
+        self.brightness = min_brightness
+        self.direction = 1          # 1 = fade up, -1 = fade down
+        self.last_time = time.ticks_ms()
+
+    def apply_brightness(self, c, level):
+        r, g, b = c
+        factor = level / 100
+        return (int(r * factor), int(g * factor), int(b * factor))
+
+    def update(self):
+        now = time.ticks_ms()
+        if time.ticks_diff(now, self.last_time) >= self.interval:
+            self.last_time = now
+
+            # Update brightness
+            self.brightness += self.direction * self.step
+
+            # Bounce at limits
+            if self.brightness >= self.max_brightness:
+                self.brightness = self.max_brightness
+                self.direction = -1
+
+            if self.brightness <= self.min_brightness:
+                self.brightness = self.min_brightness
+                self.direction = 1
+
+            # Apply brightness
+            self.np[self.index] = self.apply_brightness(self.color, self.brightness)
+            self.np.write()
+
+
+# ============================================================
+#  NEOPIXEL SETUP
+# ============================================================
+
+STRIP_PIN = 17
+STRIP_LEDS = 3
+strip = neopixel.NeoPixel(machine.Pin(STRIP_PIN), STRIP_LEDS)
+
+SINGLE_PIN = 28
+single = neopixel.NeoPixel(machine.Pin(SINGLE_PIN), 1)
+
+# ============================================================
+#  BUTTONS
+# ============================================================
+
+button_pins = [20, 21, 22]
+buttons = [machine.Pin(pin, machine.Pin.IN, machine.Pin.PULL_UP) for pin in button_pins]
+
+# ============================================================
+#  COLOR PALETTE
+# ============================================================
+
+colors = [
+    (0,   0,   0),     # Off
+    (255,   0,   0),   # Red
+    (0,   255,   0),   # Green
+    (0,     0, 255),   # Blue
+    (255, 255, 255),   # White
+]
+
+# ============================================================
+#  STRIP STATE
+# ============================================================
+
+color_index = [0, 0, 0]
+brightness = [50, 50, 50]
+last_state = [1, 1, 1]
+press_time = [0, 0, 0]
+
+# ============================================================
+#  HEARTBEAT CONFIG (NOW HAS MIN + MAX)
+# ============================================================
+
+FLASH_COLOR_INDEX = 1    # Palette color
+FLASH_MIN = 1           # << lowest brightness (0–100)
+FLASH_MAX = 10          # << highest brightness
+FLASH_STEP = 0.2           # fade speed
+FLASH_INTERVAL_MS = 20   # smoothness
+
+heartbeat = HeartbeatFadeNeoPixel(
+    neopixel_obj=single,
+    pixel_index=0,
+    color=colors[FLASH_COLOR_INDEX],
+    min_brightness=FLASH_MIN,
+    max_brightness=FLASH_MAX,
+    step=FLASH_STEP,
+    interval_ms=FLASH_INTERVAL_MS
+)
+
+# ============================================================
+#  HELPERS
+# ============================================================
+
+def apply_brightness(color, level):
+    r, g, b = color
+    factor = level / 100
+    return (int(r * factor), int(g * factor), int(b * factor))
+
+def update_strip():
+    for i in range(STRIP_LEDS):
+        strip[i] = apply_brightness(colors[color_index[i]], brightness[i])
+    strip.write()
+
+# ============================================================
+#  INITIAL
+# ============================================================
+
+update_strip()
+
+async def sensor_task():
+    global MAX_PRESSURE_KPA
+    while True:
+        gc.collect()
+        sensors.check_buttons()
+#         heartbeat.update()
+        if AVERAGE:
+            pressure = sensors.read_pressure_avg()
+        else:  
+            pressure = sensors.read_pressure()
+        #sensors.test_pin1.on()
+        if sensors.tank_full:
+            sensors.tank_full = False
+            MAX_PRESSURE_KPA = sensors.read_pressure()
+            
+        if HEARTBEAT:
+#             sensors.test_pin2.on()
+#             time.sleep_ms(100)
+#             sensors.test_pin2.off()
+#             color_index[i] = 0
+             i=0
+             color_index[i] = (color_index[i] + 1) % len(colors)
+             update_strip()
+#             time.sleep_ms(100)
+
+        else:
+#              sensors.test_pin2.off()
+#             color_index[i] = 3
+             update_strip()
+#             time.sleep_ms(100)
+                    
+        percent = pressure / MAX_PRESSURE_KPA
+        depth_mm = percent * MAX_DEPTH_M * 1000
+        sensors.tank_percentage = percent * 100
+        
+        if DISPLAY_ON:
+            oled.show(
+                rtc,
+                pressure,
+                sensors.tank_percentage,
+                sensors.cpu_temp(),
+                rssi_percent(),
+                depth_mm
+            )
+        await asyncio.sleep(1)
+
+async def main():
+    asyncio.create_task(sensor_task())
+    server = WebServer(wlan, sensors, start_time, MAX_CONNECTIONS)
+    srv = await asyncio.start_server(server.handle, "0.0.0.0", 80)
+    async with srv:
+        await asyncio.Event().wait()
+
+asyncio.run(main())