Connected AG21 User Manual

User Manual

Author

Revision

Changes

Date

Hao

1.1

Initial version

2016-07-28

The information presented in this document is strictly confidential and contains trade secrets
and other confidential information that are the exclusive property of Connected Holdings

For the

AR-2GM

Vehicle Tracking Device

April 20, 2016

R1.1

© 2016 Connected Holdings LLC 1 / 19

Contents

1 Introduction 3
2 Hardware Design 4

2.1 Basic Hardware 5

2.2 Basic RF Performance 6

2.3 Certification and Safety 9
3 Software Features 10

3.1 Basic Software 10

3.2 Remote Update 10

3.3 Power Modes 10

3.4 AT Command 11
Event Setting Commands 11
Action Commands 12
File Update Commands 12
Periodic Action Commands (with Events) 13
Configuration Commands 13
Communication related settings 13
Protocol related settings 13
Drive Trip related settings 13
Peripheral related settings 13
Maintenance report settings 14
Miscellaneous settings 14
Information Commands 14
Configuration reading commands 14
Information commands 14

3.5 Report 15
Report Queuing 15
Ack’ed Mode 15
Event Report Format 15

3.6 Reset 16

3.6.1 Context Preservation 16

3.7 Startup Banner 16

4 Test Method 17

4.1 Hardware 17

4.2 Software Test 17

Mechanical Structure(mm) 18
FCC Statement 19
RF Exposure Warning Statements: 19
IC STATEMENT 19

© 2016 Connected Holdings LLC 2 / 19

1 Introduction

The AR-2GM is a self-Contained vehicle tracking device that combines GPS location with
GSM/GPRS connectivity.
The AR-2GM appears to a user or a server application as a single endpoint device. It can be
queried, updated and configured either through a serial connection, or an over the air GPRS
IP connection, or through SMS messaging. The AR-2GM presents itself over these
connections as an enhanced cellular modem with attached functional elements. These
elements include:

 GPS location engine
 2 General Purpose Bidirectional I/O (GPIO) pins
 1 Relay drive pin output
 Serial UART port
 Input voltage monitor (optional)
 Timers
 Watchdog lockup protection (Dedicated watchdog circuit is optional)
 Factory load option for motion detection

Access to these elements and general purpose interfaces is done through an extended AT
command set as defined herein.

Application scene:

This product will be designed based on the 2G wireless data/MT6261 Baseband chipset,
which includes GPS functionality, ARM CPU and GPRS protocol. This baseband internal
connection 4M serial flash, GSM 850M/1900M RF Transceiver &GPS receiver, and RF Front
end circuit.

The device will use one dual band antenna（GSM850&PCS1900）and one dedicate
GPS antenna.

© 2016 Connected Holdings LLC 3 / 19

2 Hardware Design

Items

Requirement

Baseband Chipset

MT6261D

RF 2G Transceiver

AP6682

Air Interface

Support for Class 12 GPRS, GPS

Frequency
Antenna

GPS Antenna

Dedicate high performance ceramic antenna

UIM requirement

No-UIM mode, GSM card connector optional

Interface

UART TX

Battery Monitor

UART RX

Build in battery manager

12V DC Input（1A current）

Relay Drive (12V Output ,500mA current)

GPIO1

GPIO2

internal analog input scaled (Optional)

Supported

Dedicate Timers

No

Watchdog

Supported

Motion Detect

Optional（GPS/Sensor）

LED

2 LED Supported
2 LEDs(one is RED，one is Green)

Battery

Built in battery（80MAH Lion）

Working Time

4 hours

Power switch

No

Power Cable color

8 colors

Power Cable connector type

8 pin

Power Consumption

< 5Watts

2.1 Basic Hardware

2G band support : 850MHz &

1.9GHz Support for 12 class GPRS
Internal Antenna [850M&1900M]

The AR-2GM provides support for specialized hardware features through extended AT
commands. The features supported include the following.

GPS

The major functionality of the GPS module is to compute the correlation results between the
incoming signal and the selected PRN code based on certain Carrier Doppler Frequency,
Code Doppler Frequency, code phase, carrier phase, and the particular satellite the module is
tracking or acquiring.

GPIO

Two GPIO pins, GP1 and GP2, are presented to the external environment on the main

© 2016 Connected Holdings LLC 4 / 19

connector. They are general purpose bidirectional lines capable of providing system interrupts

LED

Function

Status

Red

GPS

On: GPS satellites acquired and Locked
Flash Slow: GPS satellite search is in progress
Off: No power or GPS subsystem fault

Green

GSM/GPRS
Connection

On: Indicates GPRS connection is made
Flash Slow: GPRS subsystem initialized but no connection
Flash Fast: GPRS initialization in process
Off: No power or GSM subsystem fault

to generate a report or drive logic levels to external devices. These lines are 2.8V logic level
and are 16V tolerant. These pins default to input. GP1 is pulled down representing 0 when
disconnected; GP2 is pulled up representing logical 1 when disconnected. They should be
asserted to a known value if used. GP1 is intended to use for Ignition Sensing.

LED’s

Two LED status indicators are provided to verify correct installation and operation. The status
LEDs are color coded and directly convey the status of the cellular and GPS subsystems as
described in the table below. Their valid operation also indicates operational status and
power.

The AR-2GM provides user control allowing the LEDs to be extinguished once installation is
verified. This feature reduces power and further conceals the AR-2GM Tracker from
untrained parties wishing to defeat its operation.

UART

A UART port is provided for AT command and data interaction and optionally for application
specific control.

Relay Driver

A 500mA sink capable output pin is provided. This pin is meant to drive a relay coil indented
to interrupt the starter solenoid relay for the ignition circuit to a car.

Battery Monitor

The battery monitor is internal analog input scaled such that the DC value of the power input
pin to the AR-2GM system is measured. This value is scaled to span the most significant 8
bits of the A/D and consequently covers a scale from 0 to 25.5 Volts.

Timers

Timers resident on the GSM baseband chip generate periodic interrupts for power down
wakeup, watchdog support, report generation and other timer related functions. Report timers
are supported by related AT command and cause generation of periodic reports.

Watchdog

MT6261D chipset provide internal software Watchdog, and a physically dedicate Watchdog

© 2016 Connected Holdings LLC 5 / 19

circuit requirement is optional.

Items

Requirements

Remark

TRP free space

>= 20 dBm

TRP free space

TIS free space

<= -104dBm

TIS free space

Antenna loss

<= -3 dB

TRP-TX Power Conducted

Antenna Loss

<= -3 dB

RX receive sensitivity conducted
– TIS

Board RF Specification

Cellular Band RX

2G Frequency range

Sensitivity

-108dBm (FER≤0.5%)

Dynamic range

-25～-108dBm (FER≤0.5%)

Single tone Desensitization

-102.4dBm(FER≤1%,-30dBm@±900KHz)

Intermediation Spurious
Response Attenuation

-102.4dBm(FER≤1%,-43dBm@±900 KHz/±1800KHz)

-91.4dBm(FER≤1%,-32dBm @±900 KHz/±1800KHz)

-80.4dBm(FER≤1%,-21dBm @±900 KHz/±1800KHz)

Conducted Spurious
Emission

<-76dBm/1MHz（RX band）

<-61dBm/1MHz（TX band）

<-47dBm/30KHz（other frequency）

Cellular Band TX

2G Frequency range

Maximum Frequency error

±200KHz

Maximum output power

Minimum controlled output
power

<-50dBm
Standby output power

<-61dBm

Code domain power

The code domain power in each inactive code channel
shall be 23 dB or more below the total output power
measured on both the I and Q data channel combined.

Time reference

±1.0uS

Waveform quality

>0.944

Range of open loop output
power

（test1：－25dBm/1.23MHz）－47.7±9.5dBm

（test2：－60dBm/1.23MHz）－7.7±9.5dBm

（test3：－93.5dBm/1.23MHz）20.3±9.5dBm

Motion Detect (Option)

A factory populates option for motion detector is provided. If populated at the time the
AR-2GM is manufactured, this option will work with firmware power down options to keep
the AR-2GM in a very low power down state until motion is detected. Upon wakening, a
report can then be generated.

2.2 Basic RF Performance

869MHz～894MHz

824MHz～849MHz

33dBm

© 2016 Connected Holdings LLC 6 / 19