Unit GPS SMA
Description
Unit GPS SMA is a GNSS global positioning and navigation unit that integrates the high-performance ATGM336H navigation module from CASIC, using the AT6668 chipset, paired with an active external antenna to provide more accurate and reliable satellite positioning services. Compared to previous products, the AT6668 supports multi-frequency and multi-mode GNSS signal reception, capable of receiving signals from multiple satellite navigation systems (including GPS, BD2, BD3, GLONASS, GALILEO, and QZSS), supporting multi-system joint positioning and single-system independent positioning, with stronger anti-interference capabilities and higher positioning accuracy. In areas with weak signals, it can quickly obtain higher precision location information. This module is widely suitable for high-precision positioning applications such as vehicle positioning and navigation, IoT positioning devices, etc.
Features
- Supports multiple satellite navigation systems (GPS/QZSS/BD2/BD3/GAL/GLO)
- Multi-frequency and multi-system reception
- Multi-channel
- External active antenna
- 2 x LEGO-compatible holes
- Programming platforms: Arduino, UIFlow, ESP-IDF, etc.
Includes
- 1 x Unit GPS SMA
- 1 x HY2.0-4P Grove cable (20cm)
- 1 x Active external antenna
Applications
- Vehicle positioning and navigation
- Wearable devices
- IoT positioning devices
- Drones
- Portable devices
- Bus stop announcements
Specifications
| Specification | Parameter |
|---|---|
| SoC | AT6668 |
| Supported Satellite Systems | GPS/QZSS/BD2/BD3/GAL/GLO Frequencies: BDS：B1I+B1C GPS/QZSS/SBAS：L1 GALILEO：E1 GLONASS：R1 |
| Channels | 50 channels |
| Communication | UART communication, default 115200bps@8N1 |
| Positioning Accuracy | <1.5m (CEP50) |
| Positioning Update Rate | Up to 10Hz |
| Protocol | NMEA0183 4.1 |
| Sensitivity | Tracking: -162dBm, Acquisition: -160dBm, Cold Start: -148dBm |
| Start Time | Cold Start: 23 seconds, Hot Start: 1 second |
| Antenna | SMA active external antenna (internal screw, internal pin), Gain: 30DBI, Frequency: 1555MHz~1580MHz, Length: 1m, Size: 38 x 36 x 13mm |
| Power Consumption | Standby: DC5V/31.64mA Operating: DC5V/40.90mA |
| Product Dimensions | 71.4 x 24 x 8mm |
| Package Dimensions | 136 x 92 x 13mm |
| Product Weight | 11.2g |
| Gross Weight | 59.6g |
Schematics
PinMap
Unit GPS SMA
| HY2.0-4P | Black | Red | Yellow | White |
|---|---|---|---|---|
| PORT.C | GND | 5V | UART_TX | UART_RX |
Model Size
Datasheets
Softwares
Arduino
Video
- Unit GPS SMA Product Introduction
Product Comparison
| Product Compare |
Unit-GPS SMA
|
Unit-GPS v1.1
 |
Unit-GPS
 |
|---|---|---|---|
| SoC | AT6668 | AT6668 | AT6558 |
| Supported Satellites | BD2/BD3/GPS/GLONASS/GALILEO/QZSS | BD2/BD3/GPS/GLONASS/GALILEO/QZSS | BDS/GPS |
| Positioning Accuracy | 1.5m | 1.5m | 2.5m |
| Channels | 50 channels (CEP50) | 50 channels (CEP50) | 32 channels (CEP50) |
| Sensitivity | Tracking: -162dBm, Acquisition: -160dBm, Cold Start: -148dBm | Tracking: -162dBm, Acquisition: -160dBm, Cold Start: -148dBm | Tracking: -162dBm, Acquisition: -148dBm, Cold Start: -146dBm |
| Cold Start | Cold Start: 23 seconds, Hot Start: 1 second | Cold Start: 23 seconds, Hot Start: 1 second | Cold Start: 35 seconds, Hot Start: 1 second |
| Antenna | External active antenna | Onboard ceramic antenna | Onboard ceramic antenna |
| Signal Strength (Number of Satellites under same conditions) | BeiDou Satellites: 18 | BeiDou Satellites: 8 | BeiDou Satellites: 5 |