Add valves and moisture sensors

pico/src/actors/valve.py

@@ -0,0 +1,13 @@
+from machine import Pin
+import asyncio
+
+class ValveActor:
+    p: Pin
+
+    def __init__(self, p: int):
+        self.p = Pin(p, Pin.OUT)
+    
+    async def dispense(self, t: float):
+        self.p.value(1)
+        await asyncio.sleep(t)
+        self.p.value(0)

pico/src/main.py

@@ -1,5 +1,7 @@
 import asyncio
 
+from actors.valve import ValveActor
+from sensors.moisture import MoistureSensor
 from vendor.microdot import Microdot, Request
 
 from statusled import STATUS_LED
@@ -24,13 +26,60 @@ async def read_sensor():
             log.info(f"distance: {d}mm")
         await asyncio.sleep(0.5)
 
+async def toggle_valves():
+    log = Logger("vlvs", Color.GREEN)
+    valves = [
+        ValveActor(19),
+        ValveActor(20),
+        ValveActor(21),
+    ]
+    while True:
+        for i, v in enumerate(valves):
+            log.info(f"[{i}]")
+            await v.dispense(1)
+            await asyncio.sleep(0.5)
+
+async def read_moisture():
+    log = Logger("mstr", Color.YELLOW)
+    sensors = [
+        MoistureSensor(26, submerged=39_000),
+        MoistureSensor(27, submerged=39_000),
+        MoistureSensor(28, submerged=39_000),
+    ]
+    """
+    minmax = [
+        (65535, 0)
+        for _ in sensors
+    ]
+    while True:
+        res: list[str] = []
+        for i, sensor in enumerate(sensors):
+            v = sensor.read()
+            v_min, v_max = minmax[i]
+            v_min = min(v_min, v)
+            v_max = max(v_max, v)
+            minmax[i] = (v_min, v_max)
+            res.append(f"[{i}] v={v} min={v_min} max={v_max}")
+        log.info("\n".join(res))
+        await asyncio.sleep(0.2)
+    """
+    while True:
+        values = [
+            sensor.read()
+            for sensor in sensors
+        ]
+        log.info(f"{values=}")
+        await asyncio.sleep(0.2)
+
 
 async def _main():
     await asyncio.gather(
         STATUS_LED.task(),
-        ensure_network(),
-        read_sensor(),
-        app.start_server(port=80)
+        read_moisture(),
+        toggle_valves(),
+        # ensure_network(),
+        # read_sensor(),
+        # app.start_server(port=80),
     )
     
 

pico/src/sensors/moisture.py

@@ -0,0 +1,19 @@
+from machine import Pin, ADC
+
+
+class MoistureSensor:
+    a: ADC
+
+    # calibration
+    submerged: int
+    dry: int
+
+    def __init__(self, a: int, submerged: int = 0, dry: int = 65535):
+        a_pin = Pin(a, Pin.IN)
+        self.a = ADC(a_pin)
+        self.submerged = submerged
+        self.dry = dry
+
+    def read(self):
+        return (self.a.read_u16() - self.dry) / (self.submerged - self.dry)
+        # return self.a.read_u16()