USR IOT USR-MB706 User manual

USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
1
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
3
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
Jinan USR IOT Technology Limited www.pusr.com
4
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

USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
5
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:

USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
6
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
Jinan USR IOT Technology Limited www.pusr.com
7
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
Jinan USR IOT Technology Limited www.pusr.com
8
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
Jinan USR IOT Technology Limited www.pusr.com
9
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
Jinan USR IOT Technology Limited www.pusr.com
10
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

USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
11
2.2.3. SMS Mode
In this mode, user's serial device can send SMS to the specified mobile phone and receive SMS from any
mobile phone. User can decide whether to transmit the data of the specified mobile phone to the serial device
through settings.
Users do not need to pay attention to the data conversion process between serial port data and SMS. They
only need to set simple parameters to realize transparent data communication between mobile phones and
serial port devices.
If the user's serial device is placed in a remote place, MB706 can be used to check the running status of the
device or control the running parameters by sending and receiving SMS.
Configure via setup software:

USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
12
Configure via AT commands:
Commands
Description
1
+++a
Enter serial AT command mode
2
AT+WKMOD=SMS
Set the work mode to SMS
3
AT+DSTNUM=10086
Set destination phone number
4
AT+SMSFLT=ON
Enable SMS filtering function
5
AT+Z
Restart the device
Note:
1. The destination phone number of SMS should be added with the international number.
2. When non-target mobile phone number filtering is enabled, the non-target mobile phone number can still
query or set parameters.

USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
13
2.3. General Function
2.3.1. Identity Package
In network transparent mode, user can set the device to send identity package to the server. Identity package
is intended to allow the server to identify the data from which device or to use it as a password to obtain
authorization for the server's functions. Identity package can be sent when the module establishes a
connection with the server, or be added at the forefront of each data packet to form a data packet to be sent
to the network. Identity package data can be ICCID code, IMEI code, CLOUD, or User-defined data.
ICCID: Unique SIM identification code, for applications based on SIM card identification.
IMEI: Unique identification code of the Internet module, which is mainly used in device identification, has
nothing to do with SIM card.
CLOUD: Cloud ID and password when connecting to PUSR Cloud.
USER: User-defined data.
Configure via setup software:

USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
14
Configure via AT commands:
Command
Description
1
+++a
Enter serial AT command mode
2
AT+WKMOD=NET
Set the work mode to “Transparent mode”
3
AT+REGEN=ON
Enable identity package function
4
AT+REGTP=USER
Set the identity package to user-defined data
5
AT+REGDT=7777772E7573722E636E
Set user-defined data, hexadecimal string
6
AT+REGSND=LINK
Set the type as the prefix of each data packet
7
AT+S
Save parameters and restart the device
2.3.2. Heartbeat Package
In network transparent mode, user can send the heartbeat package from the module to meet specific
requirements.
Heartbeat package can be sent to the network or serial port device. The main purpose of sending to the
network is to keep the connection stable and reliable, to ensure the normal connection of the module, and at
the same time, to let the server know the online status of the module.
In the application of fixed query commands sent by the server to the device, in order to reduce
communication traffic, user can choose to send heartbeat package (query commands) to the serial device
instead of sending query commands from the server, so as to save traffic and respond faster.

USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
15
Configure via setup software:
Configure via serial AT commands:
Commands
Description
1
+++a
Enter serial AT command mode
2
AT+WKMOD=NET
Set the work mode to “Transparent mode”
3
AT+HEARTEN=ON
Enable heartbeat package function
4
AT+HEARTSND=NET
Set the heartbeat method to network
5
AT+HEARTDT=7777772E7573722E636E
Set the heartbeat data, HEX format
6
AT+HEARTTM=30
Set the heartbeat sending interval to 30s
7
AT+S
Save the parameters and restart the device
2.3.3. Base Station Geolocation
USR-MB706 supports LBS base station geolocation function, and can obtain general location of the device
through the operator's network. Base station geolocation information is obtained through AT command, which
can be used flexibly with serial AT and SMS AT command.
Command
Function
Default parameter
AT+LBS
Query station positioning information
Empty

USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
16
Note: This function does not obtain positioning information directly (E.g: latitude and longitude information),
but base station location information. Users need to obtain direct positioning information through calculation
on a third-party platform. Third-party location information services are generally require charges. User can go
to the URL to convert the actual location to test:
http://www.minigps.net/cellsearch.html (This URL is for testing only and we cannot guarantee stability)
Query interface is shown below:
Click the query to get the converted location information:
2.3.4. GNSS
USR-MB706 supports multiple positioning modes, including GPS, beidou, glonass and galileo, the
positioning data can be sent to the network server or serial port. Users can choose the positioning mode and
the NMEA statement to be output.
Configuring via setup software:

USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
17
Configure via serial AT commands:
Commands
Description
1
+++a
Enter serial AT command mode
2
AT+WKMOD=NET
Set the work mode to “Transparent mode”
3
AT+GNSSEN=ON
Enable GNSS function
4
AT+GNSSENTH=1
Enable other positioning methods except GPS
5
AT+GNSSSND=COM,500
Set the sending methods and interval of the
positioning data
6
AT+GSGPLOC=1
Set the output format of the positioning data
7
AT+S
Save all parameters and restart the device
In addition to the above settings, you need to configure network connections such as Socket A and Socket B.
For details, please check section 4.1.1. After setting all parameters, save and restart the device. After MB706
connects to the network, it will send positioning data to the serial port every 500 seconds.
Except obtaining positioning data by periodic reporting, you can also query GPS data by using the
GSGPLOC command.
Note:
1. When there is data sent in positioning mode, positioning will be stopped and continued after data
transmission is completed.
2. The longest continuous positioning time is 120s.

USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
18
2.3.5. Modbus RTU to Modbus TCP
In transparent mode, if the serial device transmits data through Modbus RTU protocol and the server
communicates through Modbus TCP protocol, users can enable Modbus function. After this function is
enabled, USR-MB706 converts the Modbus TCP protocol data sent by the server to Modbus RTU data and
sends it to the serial device, and converts the Modbus RTU protocol data sent by the serial device to Modbus
TCP data and sends it to the server.
Configure via setup software:
Configure via serial AT commands:
Commands
Operation
1
+++a
Enter serial AT commands 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 socket A to TCP Client
5
AT+MODBUSEN=ON
Enable Modbus RTU to Modbus TCP conversion
6
AT+S
Save parameters and restart the device

USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
19
2.3.6. FTP Upgrading
MB706 supports FTP upgrade protocol, user's device can request files on FTP server by special protocol
through serial port. The file of the server can be split into small packets with a maximum size of 256 bytes for
transmission, which is convenient for customer device to upgrade or download large files remotely.
For details, please refer to "USR FTP Upgrade protocol".
2.3.7. Indicators
There are four LED indicators on MB706, including PWR, WORK, NET and LINKA. Indicator status is
explained as follows:
Indicators
Function
Description
POWER
Power indicator
Always on after power supply.
WORK
System status.
Flashes every 1s in normal
operation, flashes every 500ms
in positioning.
NET
Network status.
Always on after registering to
network.
LINKA
Socket A connection status
Always on after socket A
establishing connection.

USR-MB706 User Manual Technical Support: h.usriot.com
Jinan USR IOT Technology Limited www.pusr.com
20
2.3.8. Hardware Reset
After power on the device, press and hold the “Reload” button for 3~15s and release it to restore to factory
settings. Less than 3s or greater than 15 seconds is invalid.
2.3.9. Firmware Upgrading
2.3.9.1. Serial Upgrading
USR-MB706 supports upgrading firmware via serial port.
(1) Set the baud rate to 115200, data bit to 8, stop bit to 1, no parity. Open the serial port, click “Load Fw”,
select the firmware to be upgraded.