A method of controlling a fuel cell system includes applying alternating current signals to an individual fuel cell. The resulting environmentally protected low power connectors provide a small, lightweight, easy to mount, low-cost power source for a wide variety of low power accessories. Also, a debugger may use the simulation state variables in obtaining and displaying the memory variable from a cache. The access point detects congesteduncongested status of the uplink channel by using a wireless transmitter module and notifies the nodes of the congesteduncongested status of the channel by means for transmitting onto the downlink channel.