The basis of this work is the integration of the available open source technologies for the purpose of remote monitoring of temperature and humidity at the particular location. The technologies are integrated into a functional system that provides services for real time monitoring and manipulation of the measured values for preventative maintenance and data analysis. The system consists of several interconnected subsystems and each subsystem has a specific task. Measurement subystem consists of temperature and humidity sensor, which is connected to the Arduino microcontroller. Network subsystem is a remote server that receives the measured values and stores them to the database. It is also responsible for processing the data and sending the notifications and alerts in case of a deviations which are beyond allowed limits of tolerance. User subsystem includes mobile devices which are used to monitor the measured values. In addition to monitoring the values, user has access to the graphical representation of data and statistical analysis during daily or weekly measurements. Mobile device also receives a notification which containts the results in real time, which means that the user can always check the current state of measurement system. The result of this work is a functional prototype based on a open source technologies, which implies at the affordable market price, modularity and further upgrade.