Horometer and odometer

What equipment do you use and in what measurement units this numbers?

cerpas, You can get historical values of counters using unit/get_events request. Example:

var events_config = {
            itemId: <unit_id>,
            eventType: 'counters',
            ivalType: 4,
            ivalFrom: <utc_seconds_time_from>,
            ivalTo: <utc_seconds_time_to>,
        };
wialon.core.Remote.getInstance().remoteCall("unit/get_events", events_config, function(code, events) {
if (code || !events)
       return;
console.log(events);
});

It works almost perfect only sometimes gives no values. The units where they do not give value the counters have a atrack ak1-lite but there are other units with that same device and there they give the counter.

Do I have to set something up on the drive so it will absolutely always give me the value of the counters?

cerpas, we are happy to hear that this was helpful to You.

For this there is no documentation.

hhamedk, there were some performance and correctness problems with results of this request after it was added.
That's why this feature wasn't documented in time. We'll add this request to docs soon.