pi examples

Author: simonmonk

Icon

@@ -0,0 +1,27 @@
+import threading
+import time
+from guizero import App, Text
+from plant_monitor import PlantMonitor
+
+pm = PlantMonitor()
+
+app = App(title="Plant Monitor", width=550, height=300, layout="grid")
+
+def update_readings(): # update fields with new temp and eCO2 readings
+    while True:
+        wetness_field.value = str(pm.get_wetness())
+        temp_c_field.value = str(pm.get_temp())
+        humidity_field.value = str(pm.get_humidity())
+        time.sleep(1)
+
+t1 = threading.Thread(target=update_readings)
+
+# define the user interface
+Text(app, text="Wetness (%)", grid=[0,0], size=20)
+wetness_field = Text(app, text="-", grid=[1,0], size=100)
+Text(app, text="Temp (C)", grid=[0,1], size=20)
+temp_c_field = Text(app, text="-", grid=[1,1], size=100)
+Text(app, text="Humidity (%)", grid=[0,2], size=20)
+humidity_field = Text(app, text="-", grid=[1,2], size=100)
+t1.start() # start the thread that updates the readings
+app.display()

arduino3V/Icon

@@ -0,0 +1,38 @@
+import time
+from aq import AQ
+
+from plant_monitor import PlantMonitor
+pm = PlantMonitor()
+
+interval = int(input("Enter interval between readings (seconds):"))
+file_name = input("Enter filename:")
+current_time = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
+print("Logging started at: " + current_time)
+print("Press CTRL-c to end logging")
+
+f = open(file_name, "w")
+f.write("time(s)\twetness\ttemp(C)\thumidity(%)\n")
+print("time(s)\twetness\ttemp(C)\thumidity(%)\n")
+
+last_update = 0
+t0 = int(time.monotonic())
+
+try:
+    while True:
+        now = time.monotonic()
+        if (now > last_update + interval):
+            last_update = now
+            t = str(int(now) - t0)
+            wetness = str(pm.get_wetness())
+            temp_c = str(pm.get_temp())
+            humidity = str(int(pm.get_humidity()))
+            f.write(t + "\t")
+            f.write(wetness + "\t")
+            f.write(temp_c + "\t")
+            f.write(humidity + "\n")
+            print(t + "\t" + wetness + "\t" + temp_c + "\t" + humidity)
+except:
+    f.close()
+    print("\nLogging to file " + file_name + " complete")
+    current_time = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
+    print("Logging ended at: " + current_time)

esp32/Icon

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+import serial
+import time
+
+class PlantMonitor:
+    """A Class for the MonkMakes Plant Monitor"""
+
+    wetness = 0
+    temp = 0
+    humidity = 0
+    ser = None
+    delay_period = 0.1
+
+    def __init__(self):
+         self.ser = serial.Serial("/dev/ttyS0", 9600)
+
+    def get_wetness(self):
+        self.send("w")
+        self._wait_for_message()
+        return self.wetness
+
+    def get_temp(self):
+        self.send("t")
+        self._wait_for_message()
+        return self.temp
+
+    def get_humidity(self):
+        self.send("h")
+        self._wait_for_message()
+        return self.humidity
+
+    def led_off(self):
+        self.send("l")
+
+    def led_on(self):
+        self.send("L")
+
+    def send(self, message):
+        self.ser.write(bytes(message+"\n", 'utf-8'))
+        time.sleep(self.delay_period)
+
+    def _wait_for_message(self):
+        time.sleep(self.delay_period) # give attiny time to respond
+        incoming_message = str(self.ser.readline()[:-2].decode("utf-8"))  # rem>
+        message_parts = incoming_message.split("=")
+        if len(message_parts) == 2:
+            code, value = message_parts
+            if code == "w":
+                self.wetness = float(value)
+            elif code == "t":
+                self.temp = float(value)
+            elif code == "h":
+                self.humidity = float(value)
+        
+pm = PlantMonitor()
+while True:
+    print(pm.get_wetness())   
+    time.sleep(1)