Smart sensors and communication using Internet of Things in supermarkets
Sensor to Server communication
Joseph Verburg (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Niels De Winter (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Jaap Hoekstra – Mentor
Bart Frens – Mentor
Arno Smets – Graduation committee member
Andre Bossche – Graduation committee member
Paul Marcelis – Mentor
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Abstract
During 9 weeks of investigation multiple solutions for implementing a communication module in a supermarket have been explored. These results led to three options which have been further researched. Bluetooth Low Energy (BLE), 433 MHz and ZigBee have been selected as the best communication protocols
for sensor to gateway communication. Chips for these protocols have been bought and for BLE and 433 MHz libraries have been developed. For the gateway and the communication to the server a Raspberry PI and Mobile Internet have been selected and these have been integrated. During the measurements we came to the conclusion that for the RFM69HCW (433 MHz) and the BLE Nano (BLE) the sleep mode did not work as specified. Resulting in high power consumption and thus worse battery life (sleep mode consumption for RFM69HCW 3.37 mA, BLE Nano 4.38 mA and for XBee 43.2 휇A). The final conclusion of this thesis is that, with the current research, XBee (ZigBee) is
the best communication protocol for communicating within a supermarket. But in further research BLE Nano and RFM69HCW can perform better if the sleep mode is improved to work according to what is specified.