Connected AH10 User Manual
Author
Revision
Changes
Date
Hao
1.1
Initial version
2016-04-20
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 LLC
User Manual
For the
AR-3HU / SR-3HU / S4N-3HU / KT-3HU
Vehicle Tracking Device
April 20, 2016
R1.1
© 2016 Connected Holdings LLC 1 / 20
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 / 20
1 Introduction
The AR-3HU / SR-3HU / S4N-3HU / KT-3HU is a self-Contained vehicle tracking device that
combines GPS location with GSM/GPRS connectivity.
The AR-3HU / SR-3HU / S4N-3HU / KT-3HU 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 or WCDMA IP connection, or through SMS messaging.
The AR-3HU / SR-3HU / S4N-3HU / KT-3HU 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 or WCDMA wireless data/MT6276 Baseband
chipset, which includes GPS functionality, ARM CPU and GPRS protocol. This baseband
internal connection 8M serial flash, GSM 850M/1900M RF Transceiver and 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 / 20
2 Hardware Design
Items
Requirement
Baseband Chipset
MT6276A
RF 2G Transceiver
RF3235
RF 3G Transceiver
RF7411TR7
Memory
MCP_NAND 1Gb(x16) / mobile DDR
512Mb(x16)
Air Interface
Frequency
Antenna
GPS Antenna
UIM requirement
No-UIM mode, GSM card connector optional
Interface
UART TX
UART RX
12V DC Input（1A current）
Relay Drive (12V Output ,500mA current)
GPIO1
GPIO2
Battery Monitor
internal analog input scaled (Optional)
Build in battery manager
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
Support for WCDMA, Class 12 GPRS, GPS
2G band support : 850MHz & 1.9GHz Support
for 12 class GPRS
3G band support : Band
Internal
Antenna[850M&1900M]
Dedicate high performance ceramic antenna
2 & Band 5
The AR-3HU /SR-3HU / S4N-3HU / KT-3HU 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
© 2016 Connected Holdings LLC 4 / 20
incoming signal and the selected PRN code based on certain Carrier Doppler Frequency, Code
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
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 connector.
They are general purpose bidirectional lines capable of providing system interrupts 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-3HU /SR-3HU / S4N-3HU / KT-3HU provides user control allowing the LEDs to be
extinguished once installation is verified. This feature reduces power and further conceals the
AR-3HU /SR-3HU / S4N-3HU / KT-3HU 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-3HU /SR-3HU / S4N-3HU / KT-3HU 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.
© 2016 Connected Holdings LLC 5 / 20
Timers
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
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
circuit requirement is optional.
Motion Detect (Option)
A factory populates option for motion detector is provided. If populated at the time the AR-
3HU /SR-3HU / S4N-3HU / KT-3HU is manufactured, this option will work with firmware
power down options to keep the AR-3HU /SR-3HU / S4N-3HU / KT-3HU 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/1930MHz~1990MHz
824MHz～849MHz/1850MHz～1910MHz
33 dBm for Band 850, 29 dBm for Band 1900.
© 2016 Connected Holdings LLC 6 / 20
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