USR IOT USR-MB706 User manual
USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
2
1. Introduction ...............................................................................................................................................................................3
1.1. Overview ....................................................................................................................................................................... 3
1.2. Dimensions .................................................................................................................................................................... 3
1.3. Specification .................................................................................................................................................................. 4
2. Features ..................................................................................................................................................................................... 5
2.1. Network Mode ...............................................................................................................................................................5
2.2. Operation Mode .............................................................................................................................................................7
2.2.1. Transparent Mode .............................................................................................................................................. 7
2.2.2. HTTPD Client mode .......................................................................................................................................... 9
2.2.3. SMS Mode ....................................................................................................................................................... 11
2.3. General Function ......................................................................................................................................................... 13
2.3.1. Identity Package ............................................................................................................................................... 13
2.3.2. Heartbeat Package ............................................................................................................................................14
2.3.3. Base Station Geolocation ................................................................................................................................. 15
2.3.4. GNSS ................................................................................................................................................................16
2.3.5. Modbus RTU to Modbus TCP ......................................................................................................................... 18
2.3.6. FTP Upgrading .................................................................................................................................................19
2.3.7. Indicators ..........................................................................................................................................................19
2.3.8. Hardware Reset ................................................................................................................................................ 20
2.3.9. Firmware Upgrading ........................................................................................................................................ 20
3. Serial Port ................................................................................................................................................................................23
3.1. Basic Parameters ..........................................................................................................................................................23
3.2. Frame Mechanism ....................................................................................................................................................... 24
3.2.1. Time Trigger .................................................................................................................................................... 24
3.2.2. Length Trigger ................................................................................................................................................. 24
3.3. Network Data Output Port ........................................................................................................................................... 25
4. Parameter Settings ...................................................................................................................................................................25
4.1. Configuration via AT Commands ............................................................................................................................... 25
4.2. Serial AT Commands .................................................................................................................................................. 26
4.3. Network AT Commands ..............................................................................................................................................27
4.4. SMS AT Commands ....................................................................................................................................................28
5. Contact us ................................................................................................................................................................................30
6. Disclaimer ............................................................................................................................................................................... 31
7. Revision History ..................................................................................................................................................................... 32
USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
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1. Introduction
1.1. Overview
USR-MB706 is a LTE Cat M serial modem which supports GNSS. It supports LTE Cat M1, LTE Cat NB2, and
EDGE/GPRS compatible, covers global frequency bands. It has perfect software function, supports
transparent transmission, HTTPD Client, SMS mode and AT command configuration. Also, it is simple to
configure, has high reliability and built-in hardware watchdog, supports FOTA upgrading. USR-MB706 adopts
terminal interface design, RS232/RS485 interface easy to connect to serial port sensors, PLC, IPC, and
controller, meets the needs of different application scenarios such as meter reading, security monitoring,
vehicle positioning, alarms, asset tracking, etc.
Please open our official website for more information:
https://www.pusr.com/products/RS232/RS485-serial-to-LTE-cat-M-modem-MB706.html
1.2. Dimensions
USR-MB706 User Manual Technical Support: h.usriot.com
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1.3. Specification
Parameters
Description
Basic
Parameters
Standard
Cat.M1/Cat.NB2/EGPRS
Power Supply
DC 9V~36V
Consumption
Average: 30.99mA-43.05mA, maximum: 175.08mA (12V)
Indicators
POWER: Indicates power status, always on after power supply.
WORK: Indicates operation status, flashes every 1s in normal operation,
flashes every 500ms in positioning.
NET: Indicates network connection status, always on after connecting to
the network.
LINKA: Indicates socket A connection status, always on after connecting
successfully.
SIM/USIM
1.8V, 2FF
UART Interface
RS232/RS485, baud rate 2400~230400 (bps)
Antenna Interface
SMA female interface
Appearance
Dimensions (mm)
105*94*28(L*W*H)
Weight (g)
<110g
Temperature
Operation Temperature
-35℃~ +75℃
Storage Temperature
-40℃~ +85℃
Humidity
Operation Humidity
5%~95% (non-condensing)
Transmission
Speed
Cat.M1
588Kbps DL/1119Kbps UL (half-duplex)
Cat.NB2
127Kbps DL/158.5Kbps UL
EDGE
296Kbps DL/236.8Kbps UL
GPRS
107Kbps DL/85.6Kbps
Frequency
Bands
Cat.M1
B1/2/3/4/5/8/12/13/18/19/20/25/26/27/28/66/85
Cat.NB2
B1/2/3/4/5/8/12/13/18/20/25/28/66/71/85
GSM/EDGE
850/900/1800/1900 MHz
TX Power
Cat.M1
B1/2/3/4/5/8/12/13/18/19/20/25/26/27/28/66/85：21dBm+1.7/-3 dB
Cat.NB2
B1/2/3/4/5/8/12/13/18/20/25/28/66/71/85：21dBm+1.7/-3 dB
GSM850/EGSM900
33dBm±2dB
DCS1800/PCS1900
30dBm±2dB
Rx Sensitivity
Cat.M1
B1/2/3/4/5/8/12/13/18/19/20/25/26/27/28/66/85：-106dBm
Cat.NB2
B1/2/3/4/5/8/12/13/18/20/25/28/66/71/85：-114dBm
GSM850/EGSM900
-107dBm
DCS1800/PCS1900
-107dBm
Software
Operation Mode
Transparent mode, HTTPD Client mode, SMS mode
Configuration Command
AT+Command
Network Protocol
TCP/UDP/DNS/FTP/HTTP/IPV4/IPV6
Number of Sockets
2
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User Configuration
Serial AT commands, network AT commands, SMS AT commands
Heartbeat Package
Support user-defined heartbeat
Identity Package
Supports user-defined identity package/ICCID/IMEI
FOTA Upgrading
Support
GNSS
Support
Base Station
Geolocation
Support
FTP Upgrading
Support
Modbus RTU to TCP
Support
2. Features
2.1. Network Mode
MB706 support CAT M1, cat NB2, EGPRS three network modes. After configuring the network modes, users
do not need to care about the connection status between the device and base station, just need simple
configuration to connect it to the network.
Configure via Setup software:
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Configure via AT commands:
Commands
Description
1
+++a
Enter AT command mode
2
AT+NWSCMOD=0
Set the network status to “AUTO”
3
AT+WKMOD=NET
Set the work mode to “Transparent mode”
4
AT+SOCKAEN=ON
Enable Socket A
5
AT+SOCKA=TCPC,test.usr.cn,2317
Set socket A to TCP Client
6
AT+Z
Restart the device
Note:
NWSCMOD parameters:
0: Auto
1: GPRS
2: CAT M1 & CAT NB2
3: CAT M1
4: CAT NB2
USR-MB706 User Manual Technical Support: h.usriot.com
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2.2. Operation Mode
USR-MB706 has three working modes: Transparent mode, HTTPD Client mode, SMS mode.
2.2.1. Transparent Mode
In this mode, user's serial device can directly send data to the specified network server through MB706.
Module can also receive data from the server and directly forward to the serial device.
In this mode, users do not need to pay attention to the data conversion process between serial port and
network data packets. They only need to set simple parameters to realize the transparent transmission of
data between serial devices and network servers.
MB706 supports 2 socket connections, Socket A and Socket B, which are independent of each other. Only
Socket A supports as TCP Client, TCP Server and UDP Client. Socket B supports TCP Client and UDP
Client .
It supports up to 3 TCP Clients when works as a TCP Server. Because the conventional operator network can
not be accessed through the external network, so for the Server function need to use a dedicated APN card .
Configure via setup software:
USR-MB706 User Manual Technical Support: h.usriot.com
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Configure via AT commands:
Command
Description
1
+++a
Enter serial AT command mode
2
AT+WKMOD=NET
Set to transparent mode
3
AT+SOCKAEN=ON
Enable socket A
4
AT+SOCKA=TCPC,test.usr.cn,2317
Set the remote IP and port of socket A
5
AT+Z
Restart the device
USR-MB706 User Manual Technical Support: h.usriot.com
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2.2.2. HTTPD Client mode
In this mode, user’s terminal device can send request data to the specified HTTP server through this module,
then the module receives data from HTTP server, parses and sends data to the serial device.
User does not need to pay attention to the data conversion process between the serial data and the network
data packet, and can achieve the data request from the serial device to the HTTP server through simple
parameter settings.
The module will filter out the received HTTP protocol header data by default, only output user data to the
serial port. Customers can choose whether to filter HTTPD header data by AT command.
Configure via setup software:
USR-MB706 User Manual Technical Support: h.usriot.com
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Configure via AT commands:
Commands
Description
1
+++a
Enter serial AT command mode
2
AT+WKMOD=HTTPD
Set the work mode to HTTPD Client
3
AT+HTPTP=GET
Set HTTP request method
4
AT+HTPURL=/1.php[3F]
Set HTTP request URL
5
AT+HTPSV=test.usr.cn,80
Set HTTP server address and port
6
AT+HTPHD=Connection: close[0D][0A]
Set HTTP request header
7
AT+HTPTO=10
Set HTTP request timeout
8
AT+HTPFLT=ON
Set whether to filter HTTP header
9
AT+Z
Restart the device
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