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The 7Semi LC29H series is a dual-band GNSS RTK modem that supports GPS, GLONASS, Galileo, BDS and QZSS, plus NavIC on the LC29H (AI) variant. It tracks L1 and L5 bands at the same time, giving about 1 m autonomous accuracy and centimetre-level accuracy with RTK.
It is sold in variants: the LC29HDA (RTK), the LC29HBA (RTK plus dead reckoning) and the LC29HEA (RTK plus heading). Dead reckoning uses an IMU to keep position during short signal losses.
The modem has an integrated low-noise amplifier and diplexer, anti-jamming, AGNSS and a choice of UART, I2C (Qwiic), SPI and USB-C interfaces. It runs from 5 V (VIN or USB-C), measures 58 x 33 x 8 mm and has USB-C, Qwiic and SMA connectors.
RTK needs correction data from a base station or an NTRIP service, so plan how you will deliver it. Choose the variant that matches your use: DA for basic RTK, BA for dead reckoning, and EA for heading. Use a good dual-band antenna and mount it with a clear view of the sky.
Surveyors, agricultural robots, mapping drones and developers who need centimetre-level positioning on a compact board.
For centimetre-level positioning, your rover receives correction data from a base station or a network service and passes it to the modem over UART or USB. Check the correction format your service uses, use a good dual-band antenna and mount it with a clear sky view. Allow a few minutes for RTK to converge to a fixed solution.
L1 and L5 at the same time.
About 1 m autonomous, and centimetre-level with RTK.
LC29HDA (RTK), LC29HBA (RTK and dead reckoning) and LC29HEA (RTK and heading).
UART, I2C (Qwiic), SPI and USB-C.
5 V.
| Brand | 7Semi |
|---|---|
| Accuracy | 1m CEP autonomous; centimetre-level RTK |
| Dimensions | 58 x 33 x 8 mm |
| Frequency Bands | L1, L5 |
| GNSS Constellations | GPS, GLONASS, Galileo, BDS, QZSS, NavIC (LC29H AI only) |
| Interface Type | UART, I2C (Qwiic), SPI, USB-C |
| Operating Voltage | 5V |
| Selling unit | PCS |
