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11.1_Thermometer.py

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+from machine import Pin, ADC, PWM
+import time
+import math
+
+#Set ADC
+adc=ADC(26)
+led = Pin(25, Pin.OUT)
+pwm = PWM(Pin(15))
+pwm.freq(10000)
+Buzz = PWM(Pin(16))
+Buzz.freq(10000)
+try:
+    while True:
+        adcValue = adc.read_u16()
+        val = 0
+        led.value(val)
+        Buzz.duty_u16(adcValue)
+        voltage = adcValue / 65535.0 * 3.3
+        Rt = 10 * voltage / (3.3-voltage)
+        tempK = (1 / (1 / (273.15+25) + (math.log(Rt/10)) / 3950))
+        tempC = int(tempK - 273.15)
+        tempL = 2 ** int(tempC / 2)
+        Buzz.duty_u16(tempL)
+        pwm.duty_u16(tempL)
+        print("ADC value:", adcValue, "  Voltage: %0.2f"%voltage,
+              "  Temperature: " + str(tempC) + "C")
+        time.sleep(1)
+        val = 1
+        led.value(val)
+
+except:
+    pass