Constrained IoT nodes are class-1 devices9 based on the Contiki operating system and using IEEE 802.15.4 radio. Specifically, we used six TelosB (www.memsic.com/userfiles/ files/Datasheets/WSN/telosb_datasheet.pdf), 20 Zolertia Z1 (http://zolertia.io/z1), and 10 OpenMoteCC2538 (www.openmote.com/hardware.html) constrained nodes. SBC nodes are class-2 devices,9
typically running a Linux operating system and with multiple network interfaces.