丨 Product Introduction
1. Flexible configuration: can be set as a base or roaming station.
2. Multifunctional: Supports differential positioning and vector attitude measurement.
3. Low noise RF circuit: Suppresses interference to obtain clear signals and accurate positioning.
4. Compatibility: Fully compatible with Pixhawk, APM and other auto drive system.
丨 Specification parameters
|
Chip
characteristics
|
chip
|
UM982
|
|
Working mode
|
BDS: B1I、B2I、B3I
GPS: L1C/A、L2P (Y)、L2C、L5
GLONASS: L1、L2
Galileo: E1、E5a、E5b
QZSS: L1、L2、L5
|
|
Receiving channel
|
1408 channel
|
|
Accuracy
|
Single point positioning (RMS)
|
Plane: 1.5m
|
|
Elevation: 2.5m
|
|
DGPS(RMS)
|
Plane: 0.4m
|
|
Elevation: 0.8m
|
|
RTK(RMS)
|
Flat: 0.8cm+1ppm
|
|
Elevation: 1.5cm+1ppm
|
|
Directional accuracy (RMS)
|
0.2 degrees/1m baseline
|
|
Time accuracy (RMS)
|
20 ns
|
|
Speed accuracy (RMS)
|
0.2 m/s
|
|
Observation accuracy (RMS)
|
BDS
|
GPS
|
GLONASS
|
Galileo
|
|
B1I/B1C/L1 C/A/E1/G1 pseudorange
|
10cm
|
10cm
|
10cm
|
10cm
|
|
B1I/B1C/ L1 C/A/E1/G1 Carrier Phase
|
1mm
|
1mm
|
1mm
|
1mm
|
|
B3I/L2P(Y)/L2C/G2 pseudorange
|
10cm
|
10cm
|
10cm
|
10cm
|
|
B3I/L2P(Y)/L2C/G2 Carrier Phase
|
1mm
|
1mm
|
1mm
|
1mm
|
|
B2I/ L5/E5a/E5b pseudorange
|
10cm
|
10cm
|
10cm
|
10cm
|
|
B2I/ L5/E5a/E5b Carrier Phase
|
1mm
|
1mm
|
1mm
|
1mm
|
|
Time To First
Fix TTFF
|
cold boot
|
＜20s
|
|
Initialization time
|
＜5s ( Typical values)
|
|
Initialize reliability
|
＞99.9%
|
|
Output data
|
Baud rate
|
115200bps (default) [Optional: 4800-921600]
|
|
Output interface
|
TTL/USB
|
|
Output Protocol
|
NMEA0183、RTCM 3.3
|
|
Data update rate
|
1Hz-20Hz (default 1Hz)
|
|
Differential data
|
RTCM 3.3/3.2/3.1/3.0
|
|
Carrier phase output
|
Support, output RAWX statement
|
|
FLASH
|
built-in
|
|
Electrical
specifications
|
working voltage
|
3.3~5V DC
|
|
power waste
|
<800mW
|
|
Physical
parameters
|
size
|
50*30mm*3.5mm
|
|
weight
|
8.2g
|
|
Connector
|
GH1.25 4pin*2
|
|
Antenna connector
|
MMCX Elbow (customizable)*2
|
|
Environment
|
working temperature
|
-35℃-80℃
|
|
Storage temperature
|
-40℃-85℃
|
丨 product mix
Table 1 PIN Functionality
|
Pin Number
|
Signal Name
|
Signal Description
|
|
1
|
VCC
|
COM1 main power input: 3.0-5.5V
|
|
2
|
GND
|
COM1 module grounding
|
|
3
|
TXD 1
|
COM1 outputs NMEA0183 format when set as a rover and RTCM2.x/3.x format when set as a base station.
|
|
4
|
RXD 1
|
COM1 main serial port receives data and serves as the command input port.
|
|
5
|
VCC
|
COM1 main power input: 3.0-5.5V
|
|
6
|
GND
|
COM2 main power input: 3.0-5.5V
|
|
7
|
TXD2
|
COM2 output interface
|
|
8
|
RXD2
|
COM2 accepts RTCM2.x/3.x differential data input when configured as a rover.
|
|
Indicator light
|
1
|
RTK-STAT
|
RTK indicator: high when fixed, low for other states or no positioning.
|
|
2
|
POWER
|
Indicates power supply status.
|
|
3
|
PPS
|
Pulse per second (PPS) output emits pulses and the indicator flashes after positioning.
|
Table 2 Interface Characteristics
|
NO.
|
Name
|
Symbol
|
Minimum Value
|
Typical Value
|
Maximum Value
|
Unit
|
|
1
|
Main Power
|
VCC
|
2.7
|
3.3
|
5.0
|
V
|
|
2
|
Backup Power
|
VBAT
|
1.4
|
3.3
|
3.6
|
V
|
|
3
|
RF Port Feed
|
VRF
|
3.0
|
3.1
|
3.3
|
V
|
|
4
|
High-Level Input
|
VIH
|
2.0
|
|
|
V
|
|
5
|
Low-Level Input
|
VIL
|
|
|
0.7
|
V
|
|
6
|
High-Level Output
|
VOH
|
3.2
|
|
|
V
|
|
7
|
Low-Level Output
|
VOL
|
|
|
0.1
|
V
|
|
8
|
Main Serial Port Baud Rate
|
Baud
|
|
115200
|
|
bps
|
|
9
|
Differential Baud Rate
|
Baud
|
|
115200
|
|
bps
|
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About Us
DALANG is a dedicated manufacturer of high-performance GNSS modules and RTK positioning solutions, serving industries such as UAV navigation, precision agriculture, and geospatial mapping. With a clear focus on accuracy, reliability, and integration flexibility, we support both standard and custom applications across global markets. Our product lines are engineered to meet the evolving demands of real-time positioning with support for multiple GNSS constellations, including GPS, GLONASS, BDS, and Galileo.
Our production facility spans 2,500㎡ and includes advanced SMT lines, in-house R&D labs, and full functional testing for every unit shipped. With a team of 30+ GNSS engineers, we design and manufacture over 200,000 GNSS receivers and modules annually. Certified to ISO9001:2015, and compliant with CE and RoHS standards, we follow a strict quality assurance process from prototyping through mass production. We also provide firmware updates, system integration support, and full lifecycle product documentation.
Trusted by partners in over 30 countries, DALANG delivers fast, scalable manufacturing with personalized technical support. Our streamlined collaboration model—covering inquiry, consultation, prototyping, and delivery—ensures efficiency from first contact to deployment. Whether you're sourcing off-the-shelf GNSS hardware or launching a customized solution, DALANG is your dependable partner for accurate, cost-effective positioning systems.
FAQ
1. Who are we?
We are DALANG, a specialized manufacturer of GNSS modules and RTK positioning systems based in China, with a focus on high-precision solutions for UAVs, surveying, and smart agriculture.
2. How can we guarantee quality?
All products undergo strict multi-stage quality control, including SMT production, functional testing, and 100% final inspection. We are ISO9001:2015 certified and follow international compliance standards such as CE and RoHS.
3. What can you buy from us?
You can purchase GNSS receivers, RTK modules, base stations, antennas, flight control positioning systems, and other GNSS-related components and accessories.
4. Why should you buy from us not from other suppliers?
We combine strong in-house R&D, flexible OEM/ODM support, industrial-grade quality assurance, and fast global delivery. Our expertise in GNSS RTK ensures stable, accurate, and scalable solutions tailored to your specific use case.
5. What services can we provide?
We offer OEM/ODM customization, technical consulting, firmware support, prototyping, and global after-sales service. Our team works closely with international clients to ensure efficient communication and long-term support.
