3.2 ‐ Quick Start Drive Mode

Quick Start: Drive Mode Logging

Your bGeigie Zen will default to Drive mode initially, or to the last operating mode before shutdown.

The Drive mode display shows radiation measurements, location, date and time, and device status. Logging begins automatically as soon as a GPS position fix is calculated. You can configure the Zen to begin logging to a file immediately, in which case the position in the log file will be given as latitude, longitude 0,0.

To prevent TFT screen burn-in, the display dims after 60 seconds and blanks after NN?? minutes, showing a screen saver message. To restore the display, touch anywhere on the screen. The exact times and screen saver options are configurable.

In the main display

• Current dose rate in microsieverts per hour (uSv/h), based on counts per minute.
• Counts per minute averaged over 5 seconds.
• Navigation
  • Distance travelled (meters) and approximate current heading as eight points of the compass, for example "Northwest".
  • Latitude and longitude in degrees and decimals to 6 digits, as DD.dddddd. Positive numbers are east of the Prime Meridian, negative are west.
  • Altitude, meters above sea level.
  • Dilution of precision (DOP) is a figure of merit related to the uncertainty of the position fix. Lower numbers mean better accuracy. (NEED BETTER WORDING??)

The bottom status bar shows:

• Drive Current mode
• NN% Battery percentage remaining
• GM for Geiger-Muller detector status. White means that the Zen is getting "clicks", red?? means that nothing is received from the detector.
• GPSN GPS status and number of navigation satellites used for a navigation fix. More satellites give a more accurate position. The GPS receiver needs at least three satellites for a longitude-latitude position fix (2D) and four to add altitude. The colour indicates the age of the latest position fix:
  • Green, the fix was updated every second
  • Orange, the fix is stale, and the last known position is shown also in orange.
• SD The uSD card is inserted and the Zen is using it.
• WF WiFi wireless networking. In Drive mode, (How does it work in Drive mode??)
• BT Bluetooth connected. Currently this is not available.
• #5NNN The Zen ID number
• YYYY/MM/DD current date
• HH:MM UTC time, derived from the GPS receiver or, if no GPS satellites are available, from the built-in real time clock chip.

The display is updated every 1 second. (configurable??)

In Drive mode, the Zen logs to a file named according to the starting date and UTC time (24-hour) as "YYYY-MM-DD_HHMM.log". For example, "2024-02-18_1545.log" is a file started February 18, 2024 at 3:45 PM (UTC).

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