Suntech ST4955 GPS Tracking Device User Manual
- June 9, 2024
- SUNTECH
Table of Contents
ST4955 GPS Tracking Device
User Manual
ST4955
ST4955 GPS Tracking Device
CONFIDENTIAL DOCUMENT
This document belongs to intellectual property of Sentech International Ltd.
and shall neither be copied nor be given to any 3rd parties without prior
written consent from the company.
DO NOT MAKE ANY COPIES
Disclaimer
We, at Sentech, announce that this document and all other related products (i.e. device, firmware, and software) have been developed by the company, Sentech International Ltd., which is hereinafter referred to as “Sentech”. The information in this manual is believed to be accurate and reliable at the time of releasing. We, at Sentech, also assume no responsibility for any damage or loss resulting from the use of this manual, and expressly disclaim any liability or damages for loss of data, loss of use, and property damage of any kind, direct, incidental or consequential, in regard to or arising out of the performance or form of the materials presented herein or in any software program(s) that may accompany this document. When this document is released, it is most compatible with a specified firmware version. Now that the functionalities of the devices are being developed and improved continuously from time to time by Sentech, any alteration on the protocol, the firmware functions, the hardware specifications of the product is subject to change without prior notice.
Copyright
We, at Sentech, notify that Sentech holds all parts of intellectual rights applicable in the copyright laws in all the countries. The information contained in this document cannot be reproduced in any form without prior written consent made by Sentech. Any software programs that might accompany this document can be used only in accordance with any license agreement(s) between the purchaser and Sentech.
Warning
Our customers are required to be aware that connecting the wire inputs can be hazardous to both of the installer and your vehicle’s electrical system(s) if not done by an experienced installer. This document assumes you are aware of the inherent dangers of working in installing the device on the vehicle(s) and the machinery.
Document Amendments
When it comes to the firmware version column with specific firmware number,
any amendment(s) on the comments column should be made on this relevant
firmware version (and the versions thereafter). Before applying any changes
made in this protocol, you are required to make sure that you have upgraded
the firmware suitable for the
specified version.
Introduction
The ST4955 is a asset tracker for a vehicle. It is designed to collect
location data through GPS technology and interact remotely with its server by
using GPRS/HSPA technology.
In order to make the vehicle tracking system work, device should be configured
and installed properly on a vehicle whose geographical position and/or state
is desired to be remotely monitored and/or controlled.
Please note that this Operation Manual is for the standard model. In case
specific requirements are incorporated into this Manual, such a manual applies
only for the case.
For overall operation including installation, in addition to the ‘Device
Manual’, users should refer to other documents such as Parameter Manual,
Commands Manual, Reporting Manual and so on.
Overview
Main function of device installed on a vehicle is to report vehicle location and status to its monitoring server at predefined interval and to deliver command coming from the server for activating any appliance connected to the device.
2-1. Operation modes
The device works in one of the two (2) operation modes below.
- Parking mode:
- This mode is operational when ‘MOTION’ is OFF for duration longer than the pre-defined time or ‘motion sensor’ is disabled.
- Driving mode:
√ This mode starts when ‘MOTION’ is ON for duration longer than the pre- defined time.
2-2. Reports sent by device
There are 2 types of report/response sent by device to the server as follows:
√ Status Report
√ Alerts Report
2-3. Parameter change
Parameters which have already been set on the device can be changed via
GPRS/HSPA or via SMS or via RS232 connected with PC if a user needs to do so.
Some controlling functions can also be implemented in the same way.
2-4. Features
Key features of the ST4955 device are as follows:
– Unified Protocol
√ Support standard report format fixed to all models.
√ Customer can select only the data they want from the data included in the
report, so that they can configure their own report format.
– Power Saving
√ The device can save power consumption of the battery according to options. (
motion sensor and tracking time )
– LED Indicators
√ The LEDs indicate GPRS/HSPA and GPS status. It is helpful to check what
error(s) and why such an error has occurred.
Please refer to Chapter 3-1
– Maintenance server support
√ Upgrading Firmware by Over The Air (Firmware OTA)
– Alerting Battery Low & Shutdown
Device sends an alert or will be shutdown when a battery voltage is lower than
pre-defined.
DETAILED DESCRIPTION
3-1. Indication with Two(2) LEDs
RED LED indicates GPS status and blue LED indicates GPRS/HSPA status.
3-1-1. Red LED for GPS
| GPS | Blink Count | Meaning |
|---|---|---|
| Normal | 1 | 
No Fix| 2| 
< Probable Situations>
**** 1. If power is on, GPS chipset tries to find position for some minutes.
2. If device has weak connectivity with GPS network or if it has no GPS
signal position.
3. If GPS connectivity with a device is weak.
GPS Chipset Error GPS Antenna Error| 4| 
< Probable Situations>
1. If GPS antenna is disconnected.
2. If GPS antenna or socket of GPS antenna is broken.
3. If device is broken.
3-1-2. Blue LED for GPRS/HSPA
| GPRS/HSPA | Blink Count | Meaning |
|---|---|---|
| Normal | 1 | 
Server Com. Error| 2| 
< Probable Situations >
1. If the server or network parameter is wrong.
2. If the server is closed.
3. If there is a temporary network barrier.
GPRS/HSPA Com. Error| 3| 
< Probable Situations >
1. If network parameter is wrong.
2. If SIM is blocked and it is impossible to use GPRS/HSPA session.
3. If there is a temporary network barrier.
4. If device receives weak GPRS/HSPA signal.
5. If GPRS/HSPA connectivity with a device is weak.
No Network| 4| 
< Probable Causes>
1. If GPRS/HSPA antenna is disconnected.
2. If GPRS/HSPA antenna or socket of GPRS/HSPA antenna is broken.
3. If the device is broken.
---|---|---
SIM PIN Locked| 5| 
< Probable Situation >
1. If SIM PIN is enabled.
Cannot Attach NW| 6| 
< Probable Situations>
1. If device receives weak GPRS/HSPA signal.
2.If GPRS/HSPA connectivity with a device is weak.
No SIM| 7| 
< Probable Situations >
1. If there is no SIM or if SIM is not inserted properly.
2. If SIM or SIM socket is broken.
SIM PUK Locked| 8| 
< Probable Situation >
1. If SIM PUK is enabled.
3-2. Power Saving
Device turns off GPS and GPRS/HSPA part except for time to send report. All
communication with the server is impossible and it cannot receive any SMS
messages. If GPRS/HSPA wake up for sending report, will be respond to message
received.
3-3. Turn On/Off
– Turn ON
If you put a magnet on sensor position for more than 2 seconds, the device
will be turned on. Then Red and blue LEDs blink together twice. When the power
is on, Red LED will be light for 3 seconds.
– Turn OFF
If you put a magnet on sensor position for more than 2 seconds when device
turned on, the device will be turned off.
Then Red LED only blink six(6) times. When the power is off, Red LED will be
blink once a second.
3-4. Storage of Reports un-sent
Device has maximum storage capacity of the un-sent reports in such cases as
follows:
- 2,000 reports (**),
Note ():**
Due to bad report-routing environment, device could not make a real-time based
reporting. For example, the reporting router does neither run properly, is nor
connected properly. In such a situation there might be a report which has
consequently failed to arrive in the server successfully after making several
attempts to send the report to the server. In that case, the device stores
such a report for a while until such environment (e.g. GPRS/HSPA network) gets
back to normal to enable the device to try to send the report to the server
again.
When ‘reports’ start being accumulated, max 2000 reports can be hold in the
buffer storage of the device. If those ‘reports’ are triggered out to the
server, the oldest report is erased first and a new report is buffered if the
buffer is completely full of those reports. And then, a new status report
enters (FIFO: First In First Out as a sequential system).
REVISIONS
| Rev. No. | Date | Modifications were made on: | Writer |
|---|---|---|---|
| Rev. 1.00 | 2020-04-22 | Draft a manual | B.C JEON |
Caution
FCC Part 15.19
This device complies with part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference
that may cause undesired operation.
FCC Part 15.21
Any changes or modifications (including the antennas) to this device that are
not expressly approved by the manufacturer may void the user’s authority to
operate the equipment.
FCC RF Radiation Exposure Statement:
[EN] FCC and IC RF Radiation Exposure Statement: This equipment complies with
FCC and IC RF Radiation exposure limits set forth for an uncontrolled
environment.
This device and its antenna must not be co-located or operating in conjunction
with any other antenna or transmitter.
This equipment should be installed and operated with a minimum distance of 20
cm between the radiator and your body.
Sentech International Ltd.
Confidential Document