Option
Description
Time source Either “NTP”, “RTC” or “internal”. The value will show NTP is an update was
received in the recent past and if we are still using the value of the NTP time
update. This will stay on “NTP” all the while we are in a valid reading, and for
the same time afterwards. If you set the “update interval” to 2 hours, the clock
will continue to report NTP as being the time source for 2 hours after the
reading has expired.
Display time This is the time that the clock is currently showing on the display.
Real time
clock
This will either show “Not installed” if no RTC was found, or the current internal
time reported by the RTC. Normally this should be close (maximum a few
seconds difference) to the display time.
Impressions/
sec
The display update frequency. Normally this should be around 250 per second.
Total Clock
On Hours
The total accumulated time the clock has been switched on. This is saved into
flash memory once per day at midnight. It does not get forgotten.
Total Tube
On Hours
The total accumulated time the tubes have been on. If you have configured
tube blanking or have a motion sensor installed, this will be smaller
(sometimes considerably smaller) than the clock “on” time.
Option
Description
Sketch Size The size (in bytes) of the currently loaded firmware.
Free Sketch
Size
How much free space is left in the flash memory. If this is more than the
“Sketch Size”, the OTA (Over the air) update option will be available.
Sketch Hash The MD5 checksum of the firmware. This is useful when handling firmware
problems, because it tells us exactly which build version you have.
Free Heap
The amount of volatile memory still available.
Boot Version The boot loader version.
CPU
Frequency
The speed of the CPU. This is usually 160MHz.
Flash
Frequency
The speed of the communication to the flash memory. This is usually 40MHz.
