ComNav Technology SinoGNSS M900 User manual

M900 GNSS Receiver User Guide
ComNav Technology
User Guide
M900 GNSS Receiver
2022 Apr.

M900 GNSS Receiver User Guide
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CONTENTS
1. Introduction .................................................................................................................................... 4
1.1 Safety information .......................................................................................................... 4
1.2 Warning and cautions ...........................................................................................................4
1.3 Use and care ......................................................................................................................... 4
1.4 Technical assistance ..............................................................................................................5
1.5 Your comments .....................................................................................................................5
2. Overview .........................................................................................................................................6
2.1 Receiver features .................................................................................................................. 6
2.2 Technical specifications ........................................................................................................ 7
2.3 M900 basic kit .......................................................................................................................8
3. Installing the receiver ................................................................................................................... 10
3.1 Front panel ..........................................................................................................................10
3.2 Guidelines ........................................................................................................................... 11
3.2.1 Environmental requirements .................................................................................. 11
3.2.2 Power Supply ........................................................................................................... 11
3.2.3 Mounting the antenna ............................................................................................ 12
3.2.4 M900 connection view ............................................................................................13
4. Receiver configuration through a web browser ...........................................................................13
4.1 Login the configuration page of M900 ...............................................................................14
4.1.1 Login the webpage by WIFI ..................................................................................... 14
4.1.2 Login the webpage by LAN ......................................................................................14
4.2 Checking the receiver status .............................................................................................. 17
4.3 Receiver configuration ........................................................................................................18
4.3.1 Satellite tracking ...................................................................................................... 18
4.3.2 Work mode .............................................................................................................. 18
4.3.3 Antenna setup ......................................................................................................... 19
4.3.4 4G network .............................................................................................................. 19
4.3.5 WIFI and bluetooth ..................................................................................................20
4.3.6 Ethernet config ........................................................................................................ 20
4.3.7 Inertial navigation ....................................................................................................21
4.3.8 DDNS ........................................................................................................................21
4.3.9 Natapp and ngrok ....................................................................................................22
4.3.10 User management .................................................................................................23
4.4 Receiver management ........................................................................................................23
4.4.1 Data transfer............................................................................................................23
4.4.1.1 Serial Port config .................................................................................................. 24

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4.4.1.2 TCP/IP config .........................................................................................................24
4.4.1.3 Ntrip server ...........................................................................................................25
4.4.1.4 Ntrip client ............................................................................................................26
4.4.1.5 Radio .....................................................................................................................27
4.4.2 Data record .............................................................................................................. 28
4.4.3 Data download ........................................................................................................ 30
4.4.4 Receiver utility .........................................................................................................31
4.5 Firmware update................................................................................................................ 31
5. Programmatic interface ................................................................................................................ 31
5.1 Frequently used commands ............................................................................................... 32

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1. Introduction
Thank you for choosing the M900 GNSS receiver.
This Getting Started Guide will provide useful information about M900. It will also
guide you through your first step of using M900 GNSS receiver.
1.1Safety information
Before using the receiver, please make sure that you have read and understood this
Getting Started Guide, as well as the safety requirements.
-Install the M900 receiver in a location that minimizes vibration and moisture
-Avoid falling to ground, or colliding with other item
-Do not rotate 7-pin Lemo port
-Do not cover the radio, keep a sound ventilation environment
-To reduce radiation, please keep above 2 meters away from the radio station
-Take lighting protection measures when installing antennas
1.2 Warning and cautions
An absence of specific alerts does not mean that there are no safety risks involved. A
Warning or Caution information is intended to minimize the risk of personal injury
and/or damage to the equipment.
WARNING-A Warning alerts you to a potential misused or wrong setting of the equipment.
CAUTION- A Caution alerts you to a possible risk of serious injury to your person and/or damage to
the equipment.
1.3 Use and care
The M900 is designed to withstand the rough environment that typically occurs in
the field. However, the M900 is high-precision electronic equipment and should be
treated with reasonable care.

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1.4 Technical assistance
If you have any question and can’t find the answer that you need in this manual,
please contact your local dealer from which you purchased the M900. Alternatively,
please request technical support using the ComNav Website at:
www.comnavtech.com or technical support email: [email protected]om.
1.5 Your comments
Your feedback about this Getting Started Guide will help us to improve it with future
revisions. Please email your comments to: [email protected].

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2. Overview
This chapter will introduce the main features, technical specifications and basic kit of
M900 receiver.
2.1 Receiver features
The M900 is designed as a multi-purpose GNSS receiver for a wide range of
applications. Integrating with a high performance GNSS OEM Board inside, M900
GNSS receiver can provide centimeter - level positioning and high accuracy heading.
With dual antenna connectors in one compact box, it is an economical choice for
challenging guidance and positioning applications including fleet management,
marine, UGV and related unmanned control systems. A standard SinoGNSS M900
GNSS receiver provides the following features:
• 1226 GNSS tracking channels
• Working with all the running constellations
• Advanced QUANTUMTM technology
• Support INS+GNSS navigation
• Dual Antennas Design for Positioning and Heading
• LED status indicator
• Compact and rugged housing with flexible interfaces for external devices
• Integrated Ethernet and 4G modem guarantee the stability internet communication
• LAN and WIFI support Webpage Configuration

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2.2 Technical specifications
Signal Tracking
• 1226 channels with simultaneously tracked
Satellite Signals
- GPS: L1 C/A, L2C, L2P
- BeiDou: B1, B2
- BeiDou Global Signal: B1C, B2b
- GLONASS: L1, L2
- Galileo: E1, E5b
- L- Band
- SBAS: WAAS, EGNOS, MSAS, GAGAN
• Low noise carrier phase measurements with
<1 mm precision in a 1 Hz bandwidth
• High precision multiple correlates for GNSS
pseudorange measurements
• Signal Noise Ratios reported in dB-Hz
Positioning Specifications
• Post Processing Static
- Horizontal: 2.5 mm + 1 ppm RMS
- Vertical: 5 mm +1 ppm RMS
• Single Baseline RTK(<30KM)
- Horizontal: 8 mm + 1 ppm RMS
- Vertical: 15 mm + 1 ppm RMS
• DGPS: 0.5 m 3D RMS
• SBAS: 1 m 3D RMS
• Standalone: 1.5 m 3D RMS
• Heading: (0.2/R)°
• Pitch and Roll: (0.4/R)°
Communications
• 2 × 7-pin Lemo ports, contains 2 RS232, 1
CAN BUS, 1 USB
• 3 TNC connectors
- 1 UHF connector
- 2 external GNSS antenna connectors
• 1 SMA connector
Data Format
• Correction data I/O:
- RTCM 2.x, 3.x, RTCM3.2, MSM4-7, CMR
(GPS only), CMR+ (GPS only)
• Positioning data outputs:
- ASCII: NMEA-0183 GSV, RMC, HDT, VHD,
GGA, GSA, ZDA, VTG, GST, PJK, PTNL
- Extended NMEA-0183 BDGGA, GPNTR,
GPCDT, GPHPR
• Observations
ComNav binary, RINEX, RTCM3.X
Data logging
• Loop recording data function supports long
time record
• Data logging frequency, maximum 50Hz
• Storage capacity
- 8 GB internal memory
- Rinex 3.X or 2.X or ComNav binary format
• File log session
- Days or hours can be set by user
Physical
• Size (L x W x H): 183mm x 171mm x 56mm
(With connectors)
• Weight: 1kg
Environmental
• Operating temperature: -40°C to +75°C
• Storage temperature: -55°C to +85°C
• Humidity: 100% no condensation
• Water proof and dust proof: IP68
• Shock: rugged aluminum case plus plastic
ring seal, designed to survive a 1m drop onto
concrete

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- 4G antenna connector
• 1 RJ45 LAN Ethernet port (10/100M Bit)
- supports HTTP, TCP/IP, NTRIP
•UHF modem
- 410MHz - 470 MHz
• Bluetooth®
-BT4.0, Compatible with AndroidTM and
WindowsTM mobile OS
•WIFI
- 802.11 a/b/g/n/ac
•4G modem
- TCP/IP, HTTP, Ntrip protocols
Electrical
•Power consumption: <3W
•External power input: 5-27VDC
Antenna
• AT340 GNSS Geodetic Antenna
• AT190 GNSS Helix Antenna
2.3 M900 basic kit
The table below provides an overview of items included in the M900 Basic Kit.
Items
Picture
M900 GNSS Receiver
2*AT340 antenna

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A/C adapter
Lemo to RS232 cable
Network Cable
GNSS Antenna Cable/
Special cable can be
provided if you require
Lemo to USB cable
1*Car UHF Antenna with
magnetic fix bar
1*Car GPRS Antenna with
magnetic fix bar

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3. Installing the receiver
This chapter describes how to install the antenna, M900 receiver and cable
connections.
3.1 Front panel
All connectors are located on the front panel, you can connect other external devices
through these connectors.
1Setting button
Change the settings.
2OLED screen
Check receiver status, includes satellites number, position information IP address,
Firmware information and more.
3Com1 Port of Main Board (RS232 port and USB)
Control the mainboard and request data from this port
4Com2 Port of Main Board (RS232 port and CAN)
Control the mainboard and request data from this port
5LAN port
6SIM Slot
Install the SIM card
7Page down button
⑥
⑩
⑨
⑤
④
③
②
①
⑧
⑦
○
11

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Click to page down
8Radio port
Connect to radio antenna
9GNSS Antenna Connector 1
Connect to the master GNSS antenna
10 GNSS Antenna Connector 2
Connect to the slave GNSS antenna
11 GPRS antenna connector
Connect to 4G GPRS antenna
3.2 Guidelines
Please follow these guidelines when setting up your receiver.
3.2.1 Environmental requirements
To keep the receiver with a reliable performance, it is better to use the receiver in
safe environmental conditions.
• Operating temperature: -40°C to +75°C
• Out of corrosive fluids and gases
3.2.2 Power Supply
The M900 GNSS receiver has no built-in battery, which only can work with an extra
power supply. The proper voltage range is from 5VDC to 27VDC. Power supply is
connected through 7-pin Lemo to RS232 Cable (as the picture below):

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3.2.3 Mounting the antenna
Choosing the optimal location for the GNSS antenna is critical to the performance
quality of your M900 receiver. It is necessary to mount the antenna to the optimal
position in a proper way. Follow these guidelines to select the antenna location:
If the application is mobile / kinematic, place the antenna on a flat surface
along the centerline of the vehicle.
Choose an area with open view to the sky and far from metallic objects.
Avoid areas with high vibration, excessive heat, electrical interference or
strong magnetic fields.
Away from other radio frequency and electronic devices
The M900 receiver is linked with two antennas, primary antenna is connected to
Master, and secondary antenna is connected to the Slave. AT340 antenna is
recommended, if use other kinds of antenna please check the specifications with the
ComNav support team. Please install antennas in the proper position based on your
requirement.
To mount the stable antennas, there are various mounting types you can choose,
including magnetic mount, pole mount and rail mount.

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3.2.4 M900 connection view
M900 is mainly used for challenging guidance and positioning applications including
fleet management, marine, UGV and related unmanned control systems. The GNSS
antennas are fixed on top of machine. The below figure explains the connection of
each equipment.
4. Receiver configuration through a web browser
M900 has the advanced built-in web server, you can access the web setting page and
do configurations by LAN or WIFI. This section describes how to change receiver

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settings through a web server.
4.1 Login the configuration page of M900
4.1.1 Login the webpage by WIFI
You can get the WIFI name and WIFI IP address in OLED screen, the default password
is 12345678. After connecting the WIFI by computer or phone, input ip address in
browser, then you will get webpage of M900. The default username and password
are admin, it allows user to change it in webpage.
4.1.2 Login the webpage by LAN
1. Firstly, make sure that the M900 and your computer are within the same Local
Area Network (LAN). You can get M900 IP address in screen. Then change your

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receiver’s IP address by wifi webpage based on your office computer. For
example, IP address in your computer:
IP address of M900:
2. Enter the IP address and HTTP port of the receiver into the address bar, you will
access the configuration page of M900. The default setting for the HTTP port is
80, which is the standard port for web servers. However, HTTP port need to be
changed in some cases.
For example, using default port 80. http://192.168.1.205
If your receiver has a port other than 80, you must enter the IP address followed by
port number. As example shown below: http://192.168.1.205:8000

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3. Enter the default login settings to access the main page:
Username: admin
Password: admin
After accessing the main page, configuration menus are listed on the left, and
receiver’s settings on the right. Each configuration menu will be demonstrated in the
following sections.

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4.2 Checking the receiver status
Click Device Info->System Information,Status,Position info or Satellite info you
can check the corresponding receiver status, including:
System information: SN, Firmware Version, Web Version, etc.
Status: Datalink, Disk Capacity, WIFI status, etc.
Position Info: GNSS constellation system tracked, etc.
Satellite Info: SV, type, elevation, etc.

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4.3 Receiver configuration
Use configuration menu to do basic configurations of your receiver.
4.3.1 Satellite tracking
Select smooth pseudorange, setup the mask angle and select the satellite systems of
the tracking signal based on surveying requirements.
4.3.2 Work mode
There are 2 work modes you can choose:
•Base: configure the receiver as a Base station and its settings. However, you can
change the base setup only when you stop the base mode.

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•Rover: setting the receiver as a rover.
4.3.3 Antenna setup
Enter the proper values of marker name and antenna height (height limited 0 to
6.5535m), select the antenna type and measurement method.
4.3.4 4G network
In this section, you can set up 4G function in M900. When you use a SIM card, you
must enable this feature. It is best to insert the SIM card before turning on the power,
and connect the 4G antenna.
Input your SIM card APN, username and password, then click Start button. If it starts
successfully, you will get signal intensity and SIM ID.

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4.3.5 WIFI and bluetooth
Click Start to active WIFI or Bluetooth function. It allows you to customize the name,
you can check the name and status in the screen.
4.3.6 Ethernet config
Use the Ethernet Config menu to set IP address, subnet mask, default gateway and
DNS of M900. After changing those settings, you need to change your computer’s IP
address and re-login configuration webpage based on the new IP address.