An IoTbased electronic pricetag for food retail In this work a lowcost electronic Tag (eTag), using an electronic ink (eInk) display for use in food retail is presented. Each eTag has a black and white 2.9xe2x80xb3 display with 296x128 pixels and can communicate using LoRa to a central database than can configure it remotely. Measured consumption of the batteryoperated eTag show it can function for more than five years, while syncing with the central database in an hourly basis. A range of more than 250 meters indoors was measured between nodes and using a simple gateway more than 8km range was achieved. The eTag can be used in transportation, logistics and storage of raw food, to control stock, shelf life and maintain the first in first out requirements. It can also be used for dynamic pricing in a store, to reduce spoilage. The eTag is versatile and can be easily adapted, with a temperature sensor for example, to help implement a temperaturecontrolled supply chain or other applications.

Monitoring of Temperature in Retail Refrigerated Cabinets Applying IoT Over OpenSource Hardware and Software The control of refrigeration in the food chain is fundamental at all stages, with special emphasis on the retail stage. The implementation of information and communication technologies (IoT, opensource hardware and software, cloud computing, etc.) is representing a revolution in the operational paradigm of food control. This paper presents a lowcost IoT solution, based on free hardware and software, for monitoring the temperature in refrigerated retail cabinets. Specifically, the use of the ESP8266WiFi microcontroller with DS18B20 temperature sensors is proposed. The ThingSpeak IoT platform is used to store and process data in the cloud. The solution presented is robust, affordable, and flexible, allowing to extend the scope of supervising other relevant parameters in the operating process (light control, energy efficiency, consumer presence, etc.).