Allow CLI to retrieve more than 100 000 events

[uhppoted]

Hi there,

I have been using uhppote-cli to connect to some controllers and I thought I would share with you my findings on the 100,000 event log buffer of these devices.
I have a device that is currently at 111,545 events and still working, so I have been modifying the ROLLOVER variable in –cli in a fork in an attempt to work out the actual behaviour of the device, at the moment I can still access all events from 1 through 111545 from CLI or the web interface.
I don’t know whether this is specific to a board version but this controller is running V7.70.61227
I do have other boards with different versions of the firmware but they are not at 100,000 events yet.

[uhppoted]

From experimentation, it appears that the on-device event buffer is approximately 200 000 events:

Fri Dec 24 14:16:01 PST 2021
EVENTS:  423187757  1  186809
FIRST:   423187757  1      2019-02-10 07:12:01 6154410      3 false 6
LAST:    423187757  186809 2021-12-24 14:16:01 3922570474   4 true  44

Fri Dec 24 17:15:49 PST 2021
EVENTS:  423187757  2049  206817
FIRST:   423187757  2049   2021-12-17 11:42:55 3922570474   4 true  44
LAST:    423187757  206817 2021-12-24 17:15:48 3922570474   4 true  44

Once the on-device event buffer is full, events are dropped in chunks of 2048 events and the first event index updated accordingly i.e. the event index does not wrap around but continues to increment:

Fri Dec 24 17:15:49 PST 2021
EVENTS: 423187757  2049  206817
FIRST:  423187757  2049   2021-12-17 11:42:55 3922570474   4 true  44
LAST:   423187757  206817 2021-12-24 17:15:48 3922570474   4 true  44

Fri Dec 24 17:19:37 PST 2021
EVENTS: 423187757  2049   2021-12-17 11:42:55 3922570474   4 true  44
FIRST:  423187757  206825 2021-12-24 17:19:37 3922570474   4 true  44
LAST:   423187757  2049  206825

[uhppoted]

events.log

[uhppoted]

Reworked throughout - pending release of 0.7.2

[uhppoted]

Closing - fixed in release v0.7.2