–    According to the instructions, we tried to connect the devices from Broadcast terminal. –    After that, we set contiki device number 9 as a “sender” and contiki device number 34 as a “receiver”. –    Then, we’d respect to our plan we modified contiki’s command script according to the instructions. –    Then we changed the location of the receiver into different spots in the IAAC third floor studio, and the device received different integers depend on the location. –    This is the location plan and the spots. There were some spots which the signal was weak which there were no network coverage.