Wireless sensor transmission range measurement within the ground level

The maximum transmission range of crossbow wireless sensors are considered and discussed for sensor to sensor on ground level communication, and sensor on ground level to base station on lamppost. Two different crossbow wireless sensors kits operated at 900 MHz and 2400 MHz bands were used. Both indoor and outdoor sensor to sensor communication ranges were performed for one and five different types of environments respectively. The performance of the crossbow mote with four different types of antennas, in term of transmission range was considered. Several measurement results for fixed power transmission of the two operated frequencies were recorded for comparisons.