APF (Auto Parking-fence)¶
The AT@APF command is used to control the Parking-fence function.
The Parking-fence refers to a virtual circular geographical fence that automatically generated when parking. When the vehicle is ignition off, the terminal will automatically set a Parking-fence with the current location as the center. The terminal will only scan whether it exits this Parking-fence. This Parking-fence will be canceled after the terminal exits the zone.
The Record 18H could be generated and sent to backend server when the Paring-fence is generated or canceled.
In addition, the status of the Parking-fence (Data 105) can be inquired in real time by the subcommand 0 of the AT@RTO command.
Example:
AT@APF=gv500cna,,1,,500,,,012F$
+ACK:APF,123456789012345,8203,3,0,,012F,20210407101530,1234$
AT@APF?gv500cna,,0C37$
+QRY:APF,123456789012345,8203,3,0,1,1,,1,60,500,,,0C37,20210407101530,1234$
Parts |
Fields |
Length (Byte) |
Range/Format |
Default |
|---|---|---|---|---|
Head |
Header |
3 |
AT@ |
AT@ |
Command Word |
3 |
APF |
APF |
|
Leading Symbol |
1 |
= |
= |
|
Password |
8-16 |
gv500cna |
||
Body |
Reserved |
0 |
||
Mode |
1 |
0-2 |
0 |
|
Check Interval |
<=5 |
5-86400 (seconds) |
60 |
|
Radius |
<=6 |
100-100000 (meters) |
100 |
|
Reserved |
0 |
|||
Reserved |
0 |
|||
Tail |
Sequence Number |
4 |
0000-FFFF (‘0’-‘9’, ‘A’-‘F’) |
|
Tail |
1 |
$ |
$ |
Mode
0 - Disable. Disable the Parking-fence function.
1 - Enable (Automatically triggered always).
In this mode, every time the vehicle is ignition off, if there is no Parking-fence that has been generated, the terminal will automatically generate a new Parking-fence.
2 - Enable (Automatically triggered once).
After receiving the AT@APF command with this mode, the terminal will generate a new Parking-fence after the vehicle is ignition off (even if it has been generated before); when the vehicle leaves this fence, the terminal will no longer generate a new Parking-fence until it receives a new AT@APF command.
Check Interval
The checking interval for the Parking-fence event. For power consumption reasons, the terminal will turn off GNSS without affecting the application, in which case the terminal will temporarily stop detecting Parking-fence events until this interval is reached.
Radius
The radius of the circular Parking-fence region.