PWM timeout?

[Bryan Wilder]

I've combined a couple of tutorials I found on Adafruit to have a TMP36 sensor running with visual results shown through a RGB LED. If the temp exceeds a predefined temp then the light turns red, otherwise it stays green. After the loop runs 85 times the LED stops responding. I tried to incorporate PWM.cleanup() but that didn't help.

Any help would be appreciated.

import Adafruit_BBIO.ADC as ADC

import Adafruit_BBIO.PWM as PWM

import time

sensor_pin = 'P9_40'

red = "P8_13"

blue = "P8_19"

green = "P9_14"

PWM.start(red, 100)

PWM.start(blue, 100)

PWM.start(green, 100)

count = 0

ADC.setup()

PWM.cleanup()

while True:

    reading = ADC.read(sensor_pin)

    millivolts = reading * 1800  # 1.8V reference = 1800 mV

    temp_c = (millivolts - 500) / 10

    temp_f = (temp_c * 9/5) + 32

    PWM.start(green, 100)   # reset green light off

    PWM.start(red, 100)     # reset red light off

    PWM.start(blue,100)     # reset blue light off

    count = count + 1

    if temp_f < 82:

        print('Normal Temp -- (COUNT=%d) Celcius=%d; Fahrenheit=%d' % (count, temp_c, temp_f))

        PWM.start(green, 0)

    else:

        print('DANGER -- TOO HOT (COUNT=%d) Celcius=%d; Fahrenheit=%d' % (count, temp_c, temp_f))

        PWM.start(red, 0)

    time.sleep(1)