Finally figured out the chart and timing issues! Currently in the process of testing the components, but the chart displays signal strength over time with the time scale adjustable from 30 seconds to 5 minutes. RF signal strength is displayed in green and wifi is shown in magenta. The wifi curve is the strongest hotspot in range. Also indicated are the handoff and technology changes made on the RF curve and the strongest indicated hotspot.
Added a timed interval recording feature. Normally, a new record is entered provided a minimum GPS time and distance has elapsed. Also, no record was ever recorded if the mobile location has not changed. This keeps record size down to an absolute minimum. Now, with timed interval recording, a new record is added after a specified time has elapsed regardless.