No that's why I mentioned I have an external sensor. DHT22 actually.Measuring CPU temperature isn't useful for measuring the ambient temperature. You'll need to use a BMP085, BMP180, BME280, DHT11 or DS18B20 sensor or a MAX31855 SPI thermocouple amplifier (with a k-type thermocouple).
I didn't realize that. Was relying on that you could. Then it won't work as I like.555 cant be re-triggered until timed out.