- This paper will discuss about the technical measurement of pH accuracy, temperature and inertia which become the most important part in determining the feasibility of mushroom media, especially on mushroom growth. This research has developed an electronic device for measurement of mushroom media especially pH, temperature and humidity which is designed integrated using ATmega8 microcontroller. The prototype is equipped with a TD60805 pH sensor and a DHT22 temperature-humidity sensor.Keywords - Prototype pH Measurement, Temperature and Humidity or Mushroom Growing Media, ATMega8, DHT22 and Probe TD60805