To get all event updates of all units added into session use events/check_updates:

svc=events/check_updates&params={"lang":<text>,
				 "measure":<uint>,
				 "detalization":<uint>}

All parameters are optional.

Returns basic JSON (equal to all sensor groups)

"<type_name>": {
	"<sensor_id>": {
		"from": {
			"t":<uint>,	/* time (UNIX-time) */
			"y":<double>,	/* latitude */
			"x":<double>	/* longitude */
		},
		"to": {
			"t":<uint>,	/* time (UNIX-time) */
			"y":<double>,	/* latitude */
			"x":<double>	/* longitude */
		},
		"m":<uint>,		/* last message received time */
		"f":<uint> 		/* service flag */
	}
}

Returns specified detector data

"ignition": {
	"<sensor_id>": 
			{
			    "state":<uint>,	/* state: 0 - off, 1 - on */
			    "type": 1,		/* sensor type: switcher sensor */
			    "hours":<uint>,	/* engine hours for all history, sec */
			    "switches":<uint>,	/* number of swithes for all hoistory */
			    "value":<bool>	/* current value */
			}
	...
}

Here are listed all sensor types for sensors:

"sensors": {
	"<sensor_id1>": 
			{
			    "state":<uint>,	/* state: 0 - off, 1 - on */
			    "type": 1,		/* sensor type: switcher sensor */
			    "hours":<uint>,	/* engine hours for all history, sec */
			    "switches":<uint>,	/* number of swithes for all hoistory */
			    "value":<bool>	/* current value */
			},
	"<sensor_id2>": 
			{
			    "type": 2,			/* sensor type: instant sensor */
			    "counter":<uint>,		/* message sequence conuter in event */
			    "summary":<uint>,		/* value summary in event */
			    "total_counter":<uint>,	/* number of messages in history */
			    "total_summary"<uint>,	/* value summary in history */
			    "value":<double> 		/* last value; if -348201.3876 -- value unknown */
			},
	"<sensor_id3>": 
			{
			    "type": 3,			/* sensor type: differential sensor */
			    "counter":<uint>,		/* value sum in event */
			    "total_counter":<uint>,	/* value sum in history */
			    "value":<double> 		/* last value; if -348201.3876 -- value unknown */
			},
	"<sensor_id4>": 
			{
			    "type": 4,			/* sensor type: analog sensor */
			    "value":<double> 		/* last value; if -348201.3876 -- value unknown */
			}
}

"lls": {
	"<sensor_id>":
			{
			    "value":<double>, 		/* last message value with calculated level */
			    "level":<double>, 		/* average median value  (FLS filtration value is used) */
			    "filled":<double> 		/* fuel filled */
			}
}

"trips": {
		"state":<bool>,		/* state: 0 - parking, 1 - trip, 2 - stop */
		"max_speed":<uint>,	/* max speed in trip */
		"curr_speed":<uint>,	/* current speed */
		"avg_speed":<uint>,	/* average speed according to distance */
		"distance":<uint>,	/* GPS mileage in trip */
		"odometer":<uint>,	/* distance for all trips */
		"course":<uint>,	/* course */
		"altitude":<uint>	/* altitude */
}

"counters": {
	"engine_hours": <uint>,   /* engine hours counter */
	"mileage": <uint>,        /* mileage counter */
	"bytes": <uint>           /* GPRS traffic counter */ 
}

Returns user parameters Response depends on user definitions for current event.

"<type_name>": {
	"<sensor_id>": {
		"p":{	/* user-defined object content */
			"test":2,
			"foo":"bar",
			"trips":1
		}
	}
}

Returns full JSON For sensors with both type=2 and type=3 (except FLS):

"sensors": {
	"<sensor_id>": 
			{
			    "msgs": [
					{
					    "tm":<uint>,	/* message time, UNIX-time */
					    "v":<double>	/* value */
					},
					...
				    ]
			},
	...
}

For FLS:

"lls": {
	"<sensor_id>": {
		"msgs": [
			    {
				"tm":<uint>,	/* message time, UNIX-time */
				"v":<double>,	/* value */
				"l":<double>	/* average median value  (FLS filtration value is used) */
			    },
			    ...
			]
		}
	},
	...
}

Returns formatted values

"ignition": {
	"sensor_id": {
		"format": {
			    "value":<text>	/* formatted value  (usually "On"/"Off") */
		}
	}
}

"sensors": {
	"sensor_id": {
		"format": {
			    "value":<text>	/* formatted value, depends on sensor type and format */
		}
	}
}

"trips": {
	"format": {
		"distance":<text>,		/* distance according to prev message */
		"avg_speed":<text>		/* average speed according to "distance"  */
	}
}

"lls": {
	"sensor_id": {
		"format": {
			    "value":<text>,	/* formatted value, depends on sensor type and format */
			    "filled":<text>	/* fuel filled */
		}
	}
}

"counters": {
	"format": {
	"engine_hours":<uint>,   /* formatted value of engine hours counter */
	"mileage":<text>,        /* formatted value of mileage counter */
	"bytes":<uint>           /* formatted value of GPRS traffic counter */ 
	}
}