The following are disclosed: Vehicle parking detection, sensors and an On-Board Device (OBD) to create a parking session. Radars, microwave antennas, rechargeable power supplies and their power management circuits. A localized communications protocol between the wireless nodes and repeaters within a wireless network is disclosed. Wireless sensors and wireline sensors. The networks and/or systems may support parking spot management/monitoring, vehicle traffic analysis and/or management of stationary and/or moving vehicles, monitor storage areas and/or manage production facilities. These networks and/or systems may be operated to generate reports of incorrectly parked vehicles, such as reserved parking spots for other vehicles, vehicles parked in multiple parking spots and/or overstaying the time they are permitted to park.