Wireless Sensor Networks Laboratory

This Laboratory activities are provided in the framework of the Wireless Sensor Netwoks M course.

It is a 20-hours Laboratory, during which students can program IEEE 802.15.4-compliant platform.

Facilities made available to students are: i) computers; ii) 30 IEEE 802.15.4-compliant Freescale devices (approx. one Coordinator and two/three devices per group of students); iii) programmer (IAR Systems) for ARM Processors for programming devices and iv) sniffers to visualize the data packets transmitted on the air by devices. Oscilloscopes will be also available to students, to check the level of energy consumed by devices, during the different phases.

The devices used are the MC1322 Freescale Chip, working in the 2.4 GHz band, transmitting at a bit rate of 250 kbit/s and with a programmable transmit power (-30 dBm, +4 dBm).

The aim of the Lab activities is to help students in understanding the behavior of a real Wireless Sensor Network,  through experiments made on the field.

The Lab activities are mainly divided into two parts:

1. Observation of the Network behavior - Network formation procedure, data transmission, CSMA/CA protocol to access the channel, such as the multi-hop transmissions, will be observed and analyzed thanks to the help of a sniffer.

2. Programming of the devices - Students will directly program devices (the software is written in C), with the aim of implementing some applications. Some experiments will be also conducted, to evaluate the performance of the networks.