Sensor modules and devices for measuring temperature, often also moisture, are nowadays included in almost every step in the food supply chain. However, these numbers are still too small, or not sufficiently taken into account in ensuring food quality control, which is also evident by the amount of food waste before it comes to shelves.
The master's thesis presents a solution for capturing sensor data with Near Field Communication (NFC) technology and additional data protection with AES encryption. We implemented an autonomous NFC sensor system (SS-NFC) for use in the cold chain. Data is readable by mobile phone or uploaded to a server using NFC reader and NodeMCU.The system provides various modes of operation using Wi-Fi communication or local storage of sensor measurements (`On-line', `Off-line'), data encryption and user authorization. SS-NFC was analysed by testing temperature in a cold chain and by evaluating the sensor measurements of temperature, humidity and light in the refrigerator. We made a simple SS-NFC prototype with 3D printer for easy testing in a real environment.