Sun-Tech ST20B User manual

Doc. Title
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ST20B OPERATION MANUAL
M. HEIDA
HB Lee
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Date
Features and How to set parameters
1.01
29. 01. 2018
Suntech International Ltd.
Operation Manual
ST20B
Vehicle Information Device
Suntech International Ltd.

Doc. Title
Author
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ST20B OPERATION MANUAL
M. HEIDA
HB Lee
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Date
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Table of Contents
1. Introduction........................................................................................................................................ 4
2. Overview............................................................................................................................................. 4
2-1. Parameter change........................................................................................................................ 4
2-2. Features ....................................................................................................................................... 4
3. Device Pinout & Wiring Color Code.................................................................................................. 5
3-1. Device Pinout............................................................................................................................... 5
3-2. Serial Connection Options.......................................................................................................... 5
3-2-1. Pigtail Cable Adapter for RS232 connection to Tablet ...............................................................................5
3-2-3. BLE Connection Mode................................................................................................................................5
3-3. Cable adapter for RS232 to Telematics Box .............................................................................. 6
3-4. Cable adapter for connection to vehicle.................................................................................... 6
3-4-1. J1939 Type I Cable.....................................................................................................................................6
3-4-2. J1939 Type II Cable....................................................................................................................................6
3-4-3. J1708 Cable................................................................................................................................................6
4. Device Functionality.......................................................................................................................... 7
4-1. Indication with LED ..................................................................................................................... 7
4-1-1. Red LED for CAN Data...............................................................................................................................7
4-1-2. Blue LED for Bluetooth connection……………………………………………………………………………….7
4-2. Power Saving............................................................................................................................... 7
5. Commands......................................................................................................................................... 8
5-1. Version......................................................................................................................................... 8
5-2. CAN Baud rate ............................................................................................................................. 8
5-3. Vehicle Protocol .......................................................................................................................... 8
6. Report................................................................................................................................................. 9
7. Supported Accessories..................................................................................................................... 9
Revisions................................................................................................................................................ 9

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Author
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ST20B OPERATION MANUAL
M. HEIDA
HB Lee
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Date
Features and How to set parameters
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Disclaimer
We, at Suntech, announce that this document and all other related products (i.e. device, firmware, and software)
have been developed by the company, Suntech International Ltd., which is hereinafter referred to as “Suntech”.
The information in this manual is believed to be accurate and reliable at the time of releasing. We, at Suntech, 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 Suntech, any alteration on the protocol, the firmware functions, the hardware
specifications of the product is subject to change without prior notice.
Copyright
We, at Suntech, notify that Suntech 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 Suntech. Any software programs that might accompany this document can be used only in
accordance with any license agreement(s) between the purchaser and Suntech.
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.

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ST20B OPERATION MANUAL
M. HEIDA
HB Lee
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1. Introduction
ST20B
The ST20B is an ELD device. It is designed to collect data through the vehicle diagnostic connector, and interact
with a connected tablet.
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.
2. Overview
Main function of device installed on a vehicle is to report vehicle data required for ELD.
2-1. Parameter change
Parameters which have already been set on the device can be changed via RS232 connected with PC if a user
needs to do so. Some controlling functions can also be implemented in the same way.
- 9600bps, No parity, 8bit Data, Stop bit 1
2-2. Features
Key features of the ST20B device are as follows:
- Power Saving Modes (Power Down Modes)
- LED Indicators
The LEDs indicate whether or not the CAN communication is available from the vehicle
- I/O Lines
Device has:
1 Output line
1 Input lines
1 Ignition Output line
oIgnition status is detected by the CAN data
- Upgrading Firmware
In case ‘firmware’of the device has an (some) error(s) or needs to be upgraded to provide the user with newly
implemented services, the device can upgrade its internal ROM file by RS232 connection.
Over the air (OTA) updates will need to be handled by the device the ST20B is connected to, either a tablet
or telematics box.
RS232 baud rate is 115200 bps for upgrading firmware.

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3.Device Pinout & Wiring Color Code
3-1. Device Pinout
Device Connector when looking into the device:
Connection Table:
Pin Number
Connector
Description
1
8-pin
RS232 Receive (RX) Line
Communication to the device
2
8-pin
Ground
3
8-pin
Output
4
8-pin
Input
5
8-pin
RS232 Transmit (TX) Line.
Communication from the device
6
8-pin
Enable
7
8-pin
Power
8
8-pin
Ignition Output
1
6-pin
Ground
2
6-pin
CAN Low
3
6-pin
J1708 -
4
6-pin
Power
5
6-pin
CAN High
6
6-pin
J1708 +
3-2. Serial Connection Options
3-2-1. Pigtail Cable Adapter for RS232 connection to Tablet
Thhis Pigtail is used to allow the RS232 to Adnroid conversion cable to be directly connected to the ST20B device
6
3
5
2
1
4
4
2
3
1
8
6
7
5

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3-2-3. BLE Connection Mode
ST20B can communicate with the tablet using BLE communication.
3-3. Cable adapter for RS232 to Telematics Box
3-4. Cable adapter for connection to vehicle
3-4-1. J1939 Type I Cable
9-pin vehicle cable
3-4-2. J1939 Type II Cable
9-pin vehicle cable
3-4-3. J1708 Cable
6-pin vehicle cable

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4. Device Functionality
4-1. Indication with LED
RED LED indicates status of J1708 or CAN data.
4-1-1. Red LED for CAN Data
GPS
Blink Count
Description
CAN Available
1
Blink every 200ms
CAN Not Available
2
On for 3s, then Off
4-1-2. Blue LED for Bluetooth connection
Blink Count
Description
Connection
2
Blink every 500ms
Disconnection
It’s Not Blink
It’s Not Blink
4-2. Power Saving
If ST20B can receive vehicle data like as SPEED, RPM and so on via J1939 or J1708 interface, the vehicle is in
driving. In this case, ST20B will communicate with the tablet and enable charging the battery of the tablet via
RS232 cable. RS232 cable has red colored LED indicator and it will be turned on.
If ST20B cannot receive any data from the vehicle over 3 seconds, it is considered that the engine of vehicle is
turned off. In this case, ST20B will enter the Low-power mode to prevent exhausting vehicle battery.
In the Low-power mode, charging battery and communication will be stopped via RS232 cable. Also, LED indicator
of RS232 will be turned off.
If ST20B receives vehicle data in Low-power mode, it will do wakeup and restart communication and charging tablet.

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5. Commands
All command and response string is ended with CR/LF characters.
5-1. Version
CMD
Value
Description
$REQVER
Request version info of the firmware
Read firmware version
[Command] $REQVER
[Response] $REQVER: ST20B_USA_STADV_001
5-2. CAN Baud rate
CMD
Value
Description
$CAN_BAUD
Get the current value of CAN baud rate
$CAN_BAUD
250 or 500
Set baud rate to 250 or 500 kbps
Default value is 250.
Read current setting of CAN baud
[Command] $CAN_BAUD
[Response] $CAN_BAUD:250 kbps
Set CAN baud to 250kbps
[Command] $CAN_BAUD=250
[Response] $CAN_BAUD:250 kbps
Set CAN baud to 500kbps
[Command] $CAN_BAUD=500
[Response] $CAN_BAUD:500 kbps
5-3. Vehicle Protocol
CMD
Value
Description
$V_PROT
Get the current value of vehicle protocol
$V_PROT
1~3
1: J1939 only
2: J1708 only
3: Auto (J1939 then
J1708)
Set vehicle protocol between J1939 and J1708.
Default value is 3.
Read current setting of vehicle protocol
[Command] $V_PROT
[Response] $V_PROT:3
Set vehicle protocol to “J1939 only”
[Command] $V_PROT=1
[Response] $V_PROT:1
note) 3 (Auto) : ST20B report contains only one vehicle protocol. J1939 has higher priority. If vehicle data
like as SPEED or RPM can be read from J1939, report will be made based on J1939. If J1939 is
unavailable, then ST20B will try to read J1708.

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6. Report
ST20B generates report via RS232 port with 3 seconds interval.
It starts with driving time field and ESN.
e.g.)
[00:00:20]
ESN: 123456789
VIN: 1M8GDM9AXKP042007
SPEED: 20.08 km/hr
ODOMETER: 400.00 km
ENGINE HOURS: 100.00 hr
RPM: 642.50 rpm
7. Supported Accessories
Revisions
Rev. No.
Date
Modifications were made on:
Writer
1.01
17-06-29
Add Commands and Report
JW Park
- End of the Document -

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FCC Statement to the User
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one of the following measures:
1. Reorient or relocate the receiving antenna.
2. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
3. Increase the separation between the equipment and receiver.
4. Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void
the user’s authority to operate this equipment.
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 Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. End users must
follow the specific operating instructions for satisfying RF exposure compliance. To maintain compliance with FCC RF
exposure compliance requirements, please follow operation instructions as documented in this manual.
This transmitter 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.
The availability of some specific channels and/or operational frequency bands are country dependent and are firmware
programmed at the factory to match the intended destination. The firmware setting is not accessible by the end user.