feat: added pin logic for rw

pico-w/src/pin.py

@@ -0,0 +1,68 @@
+from typing import Sized
+from machine import Pin, ADC
+from micropython import const
+
+from decorators import HttpError
+
+
+relays = [
+    [Pin(0, mode=Pin.OUT), False],
+    [Pin(1, mode=Pin.OUT), False],
+    [Pin(2, mode=Pin.OUT), False]
+]
+
+moisture_sensors = const([
+    ADC(Pin(28)),
+    ADC(Pin(27)),
+    ADC(Pin(26))
+])
+
+
+min_moisture = const(0)
+max_moisture = const(65535)
+
+
+def read_moisture_sensors():
+    try:
+        data = map(read_moisture_sensor, moisture_sensors)
+        return {
+            "status": "success",
+            "message": "Successfully read moisture sensors",
+            "data": data
+        }
+
+    except:
+        return HttpError(400, {"status": "error", "message": "Something went wrong!"})
+
+
+def read_moisture_sensor(sensor: ADC):
+
+    # Reads from sensor with the help of this tutorial: https://www.diyprojectslab.com/raspberry-pi-pico-with-moisture-sensor/
+    return (max_moisture-sensor.read_u16())*100/(max_moisture-min_moisture)
+
+
+def assert_index(array: Sized, index: int):
+    return not (len(array) >= index or index < 0)
+
+
+def try_switch_relay(relay_index: int, value: bool):
+    if assert_index(relays, relay_index):
+        raise HttpError(
+            400, {"status": "error", "message": "Invalid Relay index"})
+
+    for index in range(len(relays)):
+        relay, state = relays[index]
+        if index != relay_index:
+            if state:
+                raise HttpError(
+                    400, {"status": "error", "message": f"Another Relay is already active, Please turn of {index} first"})
+            # Continue if the index is incorrect
+            continue
+        state = value
+
+        # Update the relay state
+        relays[index][1] = state
+        # Then set the pin
+        relays[index][0].value()
+
+    return {"status": "success", "message": "Successfully turned on relay", "data": map(lambda x: x[1], relays)}