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7Semi LC29H Series Industrial Dual-Band Multi-Constellation GNSS RTK Modem with USB-C and Qwiic Interface for High-Precision Positioning
The LC29H Series is a family of industrial-grade, dual-band GNSS modules designed for applications that demand precise and reliable positioning. Supporting concurrent reception of GPS, GLONASS, Galileo, BDS, QZSS, and NavIC (NavIC is exclusive to the LC29H (AI) variant), these modules track both L1 and L5 frequency bands simultaneously. This dual-band capability enables the engine to see a greater number of satellites compared to single-band modules, directly reducing the multipath effect that commonly degrades accuracy in dense urban environments, tree-covered areas, and industrial sites with signal-reflective structures.
The LC29H Series integrates an on-board LNA for improved signal sensitivity and a diplexer for effective noise cancellation and anti-interference performance. In autonomous mode, the module delivers positioning accuracy of 1 m, while RTK-capable variants achieve centimetre-level precision with fast convergence. An optional dead-reckoning (DR) function powered by an integrated IMU maintains reliable positioning continuity even in GNSS-denied or weak-signal conditions such as tunnels, underground car parks, and indoor transitions. With USB-C for host connectivity, a Qwiic-compatible I2C interface, and support for UART and SPI, the LC29H Series is well-suited for integration across a broad range of embedded platforms and development environments.
| Quectel Part No. |
GNSS Band |
Precision Type |
RTK Support |
DR Support |
Special Feature |
Best Use Case |
| LC29HAA |
Dual-band L1 + L5 |
Standard precision |
No |
No |
Basic dual-band GNSS module; supports Galileo OSNMA anti-spoofing |
General positioning, tracking, navigation |
| LC29HBA |
Dual-band L1 + L5 |
High precision |
Yes |
Yes |
High-precision GNSS with both RTK + DR functions |
Vehicle tracking, robotics, applications needing accuracy even in weak GNSS areas |
| LC29HCA |
Dual-band L1 + L5 |
Standard precision |
No |
Yes |
Standard precision GNSS with Dead Reckoning |
Vehicle tracking where GNSS signal may be blocked, such as tunnels or urban areas |
| LC29HDA |
Dual-band L1 + L5 |
High precision |
Yes, 1 Hz RTK |
No |
High-precision GNSS with 1 Hz RTK |
Cost-effective RTK positioning where low update rate is acceptable |
| LC29HEA |
Dual-band L1 + L5 |
High precision |
Yes, 10 Hz RTK |
No |
10 Hz RTK plus dual-antenna heading |
Precision navigation, heading detection, drones, robotics, autonomous systems |
Key Features
- Dual-Band Reception: Concurrent L1 and L5 GNSS signal tracking for improved satellite visibility and multipath mitigation
- Multi-Constellation Support: Compatible with GPS, GLONASS, Galileo, BDS, and QZSS; NavIC supported on LC29H (AI) variant only
- RTK Capable (Optional): Sub-metre and centimetre-level accuracy with fast convergence time for high-precision use cases
- Autonomous Accuracy: Position accuracy of 1 m in standard autonomous mode without correction data
- Dead Reckoning (Optional): Integrated DR function sustains positioning performance in weak-signal or GNSS-unavailable environments
- Integrated LNA: On-board low-noise amplifier for high receiver sensitivity
- Integrated Diplexer: On-board diplexer for effective noise cancellation and jamming resistance
- AIC and Anti-Jamming: Built-in Adaptive Interference Cancellation (AIC) and jamming detection for robust field operation
- Raw Data Output (Optional): Outputs both GNSS and IMU raw data messages for post-processing and research applications
- AGNSS Support: Integrated Assisted GNSS for faster time-to-first-fix (TTFF) in cold-start scenarios
- Multiple Interfaces: UART, I2C (Qwiic-compatible), SPI, and USB-C for flexible host connectivity
- Supply Voltage: 3.3 V operation for compatibility with standard embedded and microcontroller platforms
- Compact Form Factor: 58 mm x 33 mm x 8 mm module footprint for space-constrained designs
Applications
- Precision agriculture and autonomous field equipment requiring RTK-level accuracy
- UAV and drone navigation with real-time positioning and dead-reckoning fallback
- Robotics and autonomous ground vehicles operating in mixed indoor-outdoor environments
- Surveying and mapping instruments requiring centimetre-level GNSS performance
- Fleet telematics and asset tracking in urban canyons and low-visibility environments
- Industrial IoT devices requiring reliable multi-band positioning at 3.3 V
- Smart infrastructure monitoring with high-frequency position data logging
- Development and prototyping platforms using Qwiic or SPI-based ecosystems
