Marson MT840 User manual

MT840 User’s Manual V1.1
MT840
2D Wireless Scanner
User’s Manual
Version 1.1 DATE: 2022/07/14

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Table of Content
CHAPTER 1 INTRODUCTION............................................................................................................................................. 7
SPECIFICATIONS ............................................................................................................................................................................ 7
BEEPER INDICATION....................................................................................................................................................................... 9
LED INDICATION .......................................................................................................................................................................... 10
CHAPTER 2 GENERAL SETTINGS.................................................................................................................................. 11
BARCODE CONFIGURABILITY ....................................................................................................................................................... 11
FACTORY DEFAULT ...................................................................................................................................................................... 11
CHECK VERSION .......................................................................................................................................................................... 11
ABORT .......................................................................................................................................................................................... 12
GOOD READ INDICATOR .............................................................................................................................................................. 12
Beep Tone ............................................................................................................................................................................. 12
Beep Mode ............................................................................................................................................................................ 12
DATA FORMAT.............................................................................................................................................................................. 13
UTF-8 to Unicode Conversion ............................................................................................................................................ 13
HT/CR/ESC Converts to TAB/ENTER/ESCAPE ............................................................................................................. 13
Function Code Conversion.................................................................................................................................................. 14
Control Code Output Method.............................................................................................................................................. 14
Numeric Key.......................................................................................................................................................................... 16
Capslock Mode ..................................................................................................................................................................... 16
Keyboard Layout................................................................................................................................................................... 17
Intercharacter Delay............................................................................................................................................................. 19
Interblock Delay .................................................................................................................................................................... 19
BCC (Binary Check Character) .......................................................................................................................................... 19
GS Character Replacement................................................................................................................................................ 20
IMAGING SETTINGS ...................................................................................................................................................................... 21
Inverse Barcode.................................................................................................................................................................... 21
CHAPTER 3 INTERFACE.................................................................................................................................................. 21
BT HID......................................................................................................................................................................................... 21
Getting Connected................................................................................................................................................................ 21
Pincode Setup....................................................................................................................................................................... 22
BT SPP........................................................................................................................................................................................ 24
Getting Connected................................................................................................................................................................ 24
Set SPP Pincode .................................................................................................................................................................. 24
GENERAL BLUETOOTH SETTINGS................................................................................................................................................ 25
Power Off Timeout................................................................................................................................................................ 25
Shut Down ............................................................................................................................................................................. 26
iOS Touch Keyboard............................................................................................................................................................ 26
Secure Simple Pairing (SSP).............................................................................................................................................. 27
Set Bluetooth Device ID....................................................................................................................................................... 27

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Check Bluetooth Firmware Version ................................................................................................................................... 28
Check Device MAC Address............................................................................................................................................... 28
Check Host MAC Address................................................................................................................................................... 29
Check Battery Life ................................................................................................................................................................ 29
ScanLink ................................................................................................................................................................................ 29
MEMORY MODE ........................................................................................................................................................................... 30
Delete Last Record............................................................................................................................................................... 31
Clear All Record.................................................................................................................................................................... 31
Data Format........................................................................................................................................................................... 31
Field Separator...................................................................................................................................................................... 32
Date Format........................................................................................................................................................................... 32
Time Format .......................................................................................................................................................................... 33
Date & Time Setup ............................................................................................................................................................... 34
USB HID...................................................................................................................................................................................... 34
USB VCP .................................................................................................................................................................................... 35
CHAPTER 4 READING MODE.......................................................................................................................................... 36
TRIGGER MODE ........................................................................................................................................................................... 36
TOGGLE MODE............................................................................................................................................................................. 36
CONTINUOUS MODE .................................................................................................................................................................... 36
AUTO-SENSING MODE ................................................................................................................................................................. 37
ADVANCED READING MODE SETTINGS ....................................................................................................................................... 38
LED Auto-Off Timeout.......................................................................................................................................................... 38
Scan Interval.......................................................................................................................................................................... 38
Identical Read Interval ......................................................................................................................................................... 39
Trigger Control ...................................................................................................................................................................... 39
CHAPTER 5 DATA FORMAT............................................................................................................................................ 40
CODE ID....................................................................................................................................................................................... 40
SET ID.......................................................................................................................................................................................... 40
DATA LENGTH .............................................................................................................................................................................. 43
PREAMBLE.................................................................................................................................................................................... 43
POSTAMBLE.................................................................................................................................................................................. 43
Clear Preamble/Postamble ................................................................................................................................................. 44
TERMINATOR ................................................................................................................................................................................ 44
CHAPTER 6 SYMBOLOGIES............................................................................................................................................ 45
GENERAL SETTINGS .................................................................................................................................................................... 45
UPC-A ......................................................................................................................................................................................... 45
Enable/Disable UPC-A......................................................................................................................................................... 45
Check Digit ............................................................................................................................................................................ 46
UPC-A Expand to EAN-13 .................................................................................................................................................. 46
Add On Supplement............................................................................................................................................................. 46

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UPC-E ......................................................................................................................................................................................... 47
Enable/Disable UPC-E......................................................................................................................................................... 47
Check Digit ............................................................................................................................................................................ 47
Add On Supplement............................................................................................................................................................. 47
EAN-8.......................................................................................................................................................................................... 48
Enable/Disable EAN-8 ......................................................................................................................................................... 48
Check Digit ............................................................................................................................................................................ 48
Add On Supplement............................................................................................................................................................. 48
EAN-13........................................................................................................................................................................................ 49
Enable/Disable EAN-13 ....................................................................................................................................................... 49
Check Digit............................................................................................................................................................................ 49
Add On Supplement............................................................................................................................................................. 50
CODE 39 ...................................................................................................................................................................................... 51
Enable/Disable Code 39...................................................................................................................................................... 51
Verification ............................................................................................................................................................................. 51
Start/Stop ............................................................................................................................................................................... 51
Full ASCII Code39................................................................................................................................................................ 52
Code39 Min/Max Length ..................................................................................................................................................... 52
CODE 32 ...................................................................................................................................................................................... 53
Enable/Disable Code 32...................................................................................................................................................... 53
Leading/Tailing...................................................................................................................................................................... 53
CODABAR (NW-7)........................................................................................................................................................................ 54
Enable/Disable Codabar...................................................................................................................................................... 54
Verification ............................................................................................................................................................................. 54
Start/Stop ............................................................................................................................................................................... 54
Codabar Min/Max Length .................................................................................................................................................... 55
INTERLEAVED 2OF 5.................................................................................................................................................................... 56
Enable/Disable Interleaved 2 of 5 ...................................................................................................................................... 56
Verification ............................................................................................................................................................................. 56
Interleaved 2 of 5 Min/Max Length..................................................................................................................................... 57
STANDARD 2OF 5(IATA)............................................................................................................................................................ 58
Enable/Disable Standard 2 of 5.......................................................................................................................................... 58
Verification ............................................................................................................................................................................. 58
Standard 2 of 5 Min/Max Length ........................................................................................................................................ 59
MATRIX 2OF 5............................................................................................................................................................................. 60
Enable/Disable Matrix 2 of 5 ............................................................................................................................................... 60
Verification ............................................................................................................................................................................. 60
Matrix 2 of 5 Min/Max Length.............................................................................................................................................. 61
INDUSTRIAL 2OF 5....................................................................................................................................................................... 62
Enable/Disable Industrial 2 of 5.......................................................................................................................................... 62
Verification ............................................................................................................................................................................. 62
Industrial 2 of 5 Min/Max Length ........................................................................................................................................ 63

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CODE 11 ...................................................................................................................................................................................... 63
Enable/Disable Code 11...................................................................................................................................................... 63
Verification ............................................................................................................................................................................. 64
Check Digit ............................................................................................................................................................................ 64
Code 11 Min/Max Length .................................................................................................................................................... 64
CHINA POSTAL CODE .................................................................................................................................................................. 65
Enable/Disable China Postal Code.................................................................................................................................... 65
Verification ............................................................................................................................................................................. 65
China Postal Code Min/Max Length .................................................................................................................................. 66
MSI PLESSEY............................................................................................................................................................................... 67
Enable/Disable MSI Plessey............................................................................................................................................... 67
Verification ............................................................................................................................................................................. 67
MSI Plessey Min/Max Length ............................................................................................................................................. 68
UK PLESSEY ................................................................................................................................................................................ 69
Enable/Disable UK Plessey ................................................................................................................................................ 69
Check Digit ............................................................................................................................................................................ 69
CODE 93 ...................................................................................................................................................................................... 70
Enable/Disable Code 93...................................................................................................................................................... 70
Code 93 Min/Max Length .................................................................................................................................................... 70
CODE 128/GS1-128 ................................................................................................................................................................... 71
Enable/Disable Code 128/GS1-128................................................................................................................................... 71
Code 128/GS1-128 Min/Max Length ................................................................................................................................. 71
GS1 DATABAR (RSS-14) ........................................................................................................................................................... 72
Enable/Disable GS1 DataBar ............................................................................................................................................. 72
GS1 DATABAR LIMITED (RSS-LIMITED)..................................................................................................................................... 72
Enable/Disable GS1 DataBar Limited ............................................................................................................................... 72
GS1 DATABAR EXPANDED (RSS-EXPANDED)........................................................................................................................... 72
Enable/Disable GS1 DataBar Expanded .......................................................................................................................... 72
GS1 DataBar Expanded Min/Max Length......................................................................................................................... 73
Surround GS1 Application Identifiers (AI’s) with Parentheses....................................................................................... 73
QR CODE ..................................................................................................................................................................................... 74
Enable/Disable QR Code .................................................................................................................................................... 74
MICRO QR CODE......................................................................................................................................................................... 74
Enable/Disable Micro QR Code.......................................................................................................................................... 74
DATA MATRIX............................................................................................................................................................................... 74
Enable/Disable Data Matrix................................................................................................................................................. 74
PDF417....................................................................................................................................................................................... 75
Enable/Disable PDF417 ...................................................................................................................................................... 75
MICROPDF417............................................................................................................................................................................ 75
Enable/Disable MicroPDF417............................................................................................................................................. 75
AZTEC........................................................................................................................................................................................... 75
Enable/Disable Aztec ........................................................................................................................................................... 75

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MAXICODE ................................................................................................................................................................................... 76
Enable/Disable MaxiCode ................................................................................................................................................... 76
HANXIN ......................................................................................................................................................................................... 76
Enable/Disable Hanxin......................................................................................................................................................... 76
CODE 16K.................................................................................................................................................................................... 76
Enable/Disable Code 16K ................................................................................................................................................... 76
CHAPTER 6 APPENDIX .................................................................................................................................................... 77
APPENDIX –NUMBERS ................................................................................................................................................................ 77
APPENDIX –UPPER CASE ALPHABETS ....................................................................................................................................... 78
APPENDIX –LOWER CASE ALPHABETS....................................................................................................................................... 80
APPENDIX –CONTROL CODES .................................................................................................................................................... 82
APPENDIX –SYMBOLS ................................................................................................................................................................. 84
APPENDIX –FUNCTION KEYS ...................................................................................................................................................... 87
APPENDIX –NAVIGATION KEYS ................................................................................................................................................... 88
APPENDIX –MODIFIER KEYS ....................................................................................................................................................... 89
APPENDIX –ABORT ..................................................................................................................................................................... 90
APPENDIX –DEFAULT TABLE ...................................................................................................................................................... 91
APPENDIX –FACTORY ID ............................................................................................................................................................ 96
APPENDIX –ASCII TABLE ........................................................................................................................................................... 98
VERSION HISTORY ......................................................................................................................................................... 102

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Chapter 1 Introduction
This user’s manual is dedicated to MT840, a portable 2D scanner that can send data to the host
up to 20 meters away. This economical, ergonomic pocket-sized wireless 2D barcode scanner is
a high efficient companion for users who work with laptops, tablets, smart phones and other
mobile devices with iOS®, Android®and Windows®.
Specifications
Optic & Performance
Light Source White LED
Visible red LED
Sensor
640 x 480
Scan Rate
30 Frames/Sec
Resolution 5mil / 0.125mm (1D)
10mil / 0.25mm (2D)
Scan Angle Horizontal 37°
Vertical 27.5°
Pitch Angle
±60°
Skew Angle
±60°
Roll Angle
360°
Print Contrast Ratio
25%
Width of Field
141mm (13Mil Code39)
Scan Button
(Trigger)
LED Indicator
Exit Window
Mini USB port
(with protective cover)

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Memory
2MB (20,000 barcodes)
Guaranteed D.O.F
(Environment: 800 lux)
5 Mil Code 39 : 55 ~ 115mm
15 Mil Code 39 : 60 ~ 350mm
13 Mil UPC/EAN : 55 ~ 285mm
15 Mil QR Code : 40 ~ 255mm
10 Mil Data Matrix : 40 ~ 135mm
Physical Characteristics
Dimension
W25.6 x L65.6 x H18.2 mm
Weight
26.7g
Color
Black
Material
PC
Cable Mini(M) to USB A(M) Cable, 1.5M
Trigger
Scan Button
Indicator
LED, Buzzer
Electrical
Operation Voltage
3.7 VDC ± 5%
Working Current
< 210mA
Standby Current
< 25mA
Battery
3.7V, 350mAh, Li-Polymer Battery
Number of Scan
(per full charge)
> 6,000 scans
(1 scan/ 5 secs, Bluetooth connected)
Connectivity
Radio
Bluetooth 5.0 dual mode (Class 2)
Range
66 ft/ 20m (line of sight)
Interface/ Profile
BT HID
BT SPP
USB HID
USB VCP
Memory
User Environment
Operating Temperature
-10 ~ 50˚C
Storage Temperature
-20 ~ 60˚C
Humidity
0% ~ 95%RH (Non-condensing)
Drop Durability
1.5M
Sealing
IP55
Ambient Light
70,000 Lux (Sunlight)
1D Symbologies
UPC-A/ UPC-E0/ UPC-E1, EAN-8/ EAN-13,
Code128, Code39, Code93, Codabar,
Interleaved 2 of 5, Industrial 2 of 5, Matrix 2
of 5, Standard 2 of 5 (IATA), China Post 25,

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Code11, MSI Plessey, Plessey, GS1
Databar, GS1 Databar Limited, GS1 Databar
Expanded
2D Symbologies
QR Code, Micro QR Code, PDF417,
MicroPDF417, Data Matrix, Aztec,
MaxiCode, Han Xin, Code 16K
Regulatory
ESD
Functional after 4KV contact, 8KV air
discharge
EMC/RF
TBA
Safety Approval
EN/IEC62471 (Exempt Group)
Environmental
WEEE, RoHS 2.0
Beeper Indication
Beeper Status
Single beep
Good read
Single short beep The scanner reads a Code39 ASCII during
multi-step configuration
Two beeps
Wireless connection
The scanner successfully reads a
configuration barcode
Three beeps
Wireless disconnection
Three short beeps
The scanner reads a barcode while
disconnected
The scanner reads an unexpected barcode
during multi-step configuration. (Please
scan “
Abort
” and start over)
Memory Full
Four beeps (Hi-Lo-Hi-Lo)
Out of range / Poor connection
Five beeps
Low power

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LED Indication
LED Status
Off
Power off / Standby / Connected
Flashing green
Disconnected / Discoverable
One green flash
Good read
Flashing red
Low power
Solid red
Charging

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Chapter 2 General Settings
Barcode Configurability
Scanning below configuration barcodes will allow/prohibit user to change settings by scanning
configuration barcodes in this manual.
Enable Barcode Configurability*
Disable Barcode Configurability
Factory Default
Scanning below configuration barcode will reset all parameters to factory default settings (the ones
with *asterisk mark)
Factory Default
Check Version
To check firmware version, please scan below configuration barcode.
Check Version

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Abort
If there is an error reading data barcode during multi-step configuration, you may cancel
configuration by scanning below configuration barcode.
Abort
Good Read Indicator
Beep Tone
Off
Beep Low (2.0KHz)
Beep Medium (2.7KHz)
Beep High (4.0KHz)*
Beep Mode
Normal*
Warning Beep Only
Mute

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Data Format
UTF-8 to Unicode Conversion
Off*
On
Note:
To output double-byte character (i.g. Chinese) using UTF-8 to Unicode Conversion, please make
sure that the application accepting barcode data supports Unicode display (i.g. Word, TeraTerm).
HT/CR/ESC Converts to TAB/ENTER/ESCAPE
Off*
On
Note:
1. By default, HT [$I], CR [$M] and ESC [%A] is transmitted as <0x09>, <0x0D> and <0x1B>
respectively.
2. When enabled, HT [$I], CR [$M] and ESC [%A] is transmitted as <TAB>, <ENTER> and
<ESCAPE> on keyboard respectively.

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Function Code Conversion
Off
On*
Note:
Once disabled, the scanner will output the original encoded data of the barcodes in Appendix –
Function/Navigation/Modifier Keys.
Control Code Output Method
Ctrl Mode* Alt Mode
Disable Output
Note:
Control code (0x01 ~ 0x1A) can be sent by two methods:
(1) Ctrl Mode:
A barcode of “A<HT>F” (0x41/0x09/0x46) is scanned, the output sequence is:
a. Enter “A” – Press A key
b. Enter “Ctrl + I” – Since 0x09 corresponds to “CtrI + I”, virtual keyboard will press and hold
Ctrl key, press I key, and release Ctrl key and I key
c. Enter “F” – Press F key

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Since “Ctrl+I” is shortcut for italicizing text in some software applications, the result of above
output sequence can be a regular A plus an italic F.
(2) Alt Mode:
For <HT>, the output sequence of virtual keyboard is:
Enter “Alt + 0 + 9” – Virtual keyboard will press and hold Alt key, press “0” and “9” on numeric
keypad respectively, and release Alt key.
Control Code Table
ASCII
Hex
Dec
Ctrl Mode
Alt Mode
NUL
00
0
Alt+0+0
Alt+0+0
SOH
01
1
Ctrl+a
Alt+0+1
STX
02
2
Ctrl+b
Alt+0+2
ETX
03
3
Ctrl+c
Alt+0+3
EOT
04
4
Ctrl+d
Alt+0+4
ENQ
05
5
Ctrl+e
Alt+0+5
ACK
06
6
Ctrl+f
Alt+0+6
BEL
07
7
Ctrl+g
Alt+0+7
BS
08
8
Ctrl+h
Alt+0+8
HT
09
9
Ctrl+i
Alt+0+9
LF
0A
10
Ctrl+j
Alt+1+0
VT
0B
11
Ctrl+k
Alt+1+1
FF
0C
12
Ctrl+l
Alt+1+2
CR
0D
13
Ctrl+m
Alt+1+3
SO
0E
14
Ctrl+n
Alt+1+4
SI
0F
15
Ctrl+o
Alt+1+5
DLE
10
16
Ctrl+p
Alt+1+6
DC1
11
17
Ctrl+q
Alt+1+7
DC2
12
18
Ctrl+r
Alt+1+8
DC3
13
19
Ctrl+s
Alt+1+9
DC4
14
20
Ctrl+t
Alt+2+0
NAK
15
21
Ctrl+u
Alt+2+1
SYN
16
22
Ctrl+v
Alt+2+2
ETB
17
23
Ctrl+w
Alt+2+3
CAN
18
24
Ctrl+x
Alt+2+4
EM
19
25
Ctrl+y
Alt+2+5
SUB
1A
26
Ctrl+z
Alt+2+6
ESC
1B
27
Alt+2+7
Alt+2+7

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FS
1C
28
Alt+2+8
Alt+2+8
GS
1D
29
Alt+2+9
Alt+2+9
RS
1E
30
Alt+3+0
Alt+3+0
US
1F
31
Alt+3+1
Alt+3+1
Numeric Key
Numeric Key
Alphanumeric Key*
Note:
1. By default, the alphanumeric key is used for 16ecommended16 digits. Scan NUMERIC KEY if
you want to use the keys on the numeric keypad.
2. If you select NUMERIC KEY, the Num Lock status of the physical keyboard should be ON.
Capslock Mode
Capslock Off* Capslock On
Capslock Free
Note:
When barcode scanner is set to Capslock Free mode, no matter keyboard Capslock LED indicator
is ON or OFF, output will be always the same as the Original barcode. In other words, what you see
is what output is.

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Keyboard Layout
English (US)* English (UK)
Danish Spanish
Hungarian (QWERTZ) Hungarian (QWERTY)
Canadian French Dutch
Italian
French
German Swiss German
Swiss French
Swedish

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Czech (QWERTZ) Czech (QWERTY)
Norwegian Belgian
Portuguese Slovak
Brazilian (QWERTY)
Canadian (Traditional)
Japanese
Alt Code

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Intercharacter Delay
The configurable range is from 0 to 255ms, with 1ms increment. The larger the number, the longer
the delay.
Set Intercharacter Delay
(Default = 4ms)
Example: Set Intercharacter Delay to 8ms
Step1: Scan Set Intercharacter Delay
Step2: Scan “0” “0” “8” in Appendix – Numbers
Step3: Scan Set Intercharacter Delay
Interblock Delay
The configurable range is from 0 to 2550ms, with 10ms increment. The larger the number, the
longer the delay.
Set Interblock Delay
(Default = 0ms)
Example: Set Interblock Delay to 20ms
Step1: Scan Set Interblock Delay
Step2: Scan “0” “0” “2” in Appendix – Numbers
Step3: Scan Set Interblock Delay
BCC (Binary Check Character)
On
Off*
Note:

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Once enabled, a checksum will be added to the end of each data to conduct Xor calculation. For
Bluetooth SPP & USB VCP, the BCC is 1 byte. For Bluetooth HID & USB HID the BCC are 2 bytes.
Example:
The barcode data is “TEST” with terminator <CR><LF>
Chapter 1 BT SPP & USB VCP:
Data Format = <T> + <E> + <S> + <T> + <CR> + <LF> + <BCC>.
BCC = 54h ^ 45h ^ 53h ^ 54h ^ 0Dh ^ 0Ah = 11h
2. BT HID & USB HID:
Data Format = <T> + <E> + <S> + <T> + <Enter> + <BCC>
BCC = 54h ^ 45h ^ 53h ^ 54h ^ E7h = F1h
However, since control character cannot be displayed in Bluetooth HID & USB HID, BCC will be
converted into 2 bytes of characters.
As a result, the data will be: TEST + <Enter> + F + 1
GS Character Replacement
Enable GS Character Replacement
Disable GS Character Replacement*
Define Replacement Character
Note:
1. When enabled, the <GS> character in all barcodes will be replaced by the one defined by the
user.
2. To define replacement character, please refer to below:
Example: Set Replacement Character as “X"
Step1: Scan “Define Replacement Character”
Step2: Scan “X” in Appendix - Upper Case Alphabets
Step3: Scan “Define Replacement Character”