Unit GPS SMA
Description
Unit-GPS SMA is a GNSS global positioning and navigation unit, integrating the high-performance ATGM336H navigation module from Microelectronics, based on the AT6668 chip design. It is equipped with an external active antenna, offering more precise and reliable satellite positioning services. Compared to previous models, the AT6668 supports multi-frequency and multi-mode GNSS signal reception, enabling compatibility with multiple satellite navigation systems (including GPS, BD2, BD3, GLONASS, GALILEO, and QZSS). It supports combined multi-system positioning or single-system independent positioning, offering enhanced interference resistance and higher positioning accuracy. This module is well-suited for high-accuracy positioning applications such as vehicle navigation, IoT location devices, and more, even in weak signal areas.
Features
- Supports multiple satellite navigation systems (GPS/QZSS/BD2/BD3/GAL/GLO)
- Multi-frequency and multi-system reception
- Multi-channel support
- External active antenna
- 2x LEGO-compatible holes
- Programmable platforms: Arduino, UIFlow, ESP-IDF, etc.
Includes
- 1x Unit-GPS SMA
- 1x HY2.0-4P cable (20CM)
- 1x External active antenna
Applications
- Vehicle positioning and navigation
- Wearable devices
- IoT location devices
- Drones
- Portable devices
- Public transportation announcement systems
Specifications
| Specifications | Details |
|---|---|
| SoC | AT6668 |
| Supported Systems | GPS/QZSS/BD2/BD3/GAL/GLO Frequencies: BDS: B1I+B1C GPS/QZSS/SBAS: L1 GALILEO: E1 GLONASS: R1 |
| Channels | 50 |
| Communication | UART (default: 115200bps@8N1) |
| Positioning Accuracy | <1.5m (CEP50) |
| Positioning Update | Maximum 10Hz |
| Protocol | NMEA0183 4.1 |
| Sensitivity | Tracking: -162dBm, Acquisition: -160dBm, Cold start: -148dBm |
| Startup Time | Cold start: 23 seconds, Hot start: 1 second |
| Antenna | SMA active external antenna (inner thread, inner pin), Gain: 30DBI Frequency: 1555MHz~1580MHz Length: 1m Size: 38*36*13mm |
| Power Consumption | Standby: DC5V/31.64mA Working: DC5V/40.90mA |
| Product Dimensions | 71.4*24*8mm |
| Packaging Dimensions | 136*92*13mm |
| Product Weight | 11.2g |
| Packaging Weight | 59.6g |
Related Links
Schematic
PinMap
| GPS Unit SMA | RXD | TXD | VCC | GND |
|---|---|---|---|---|
| M5Core (PORT C) | GPIO16 | GPIO17 | 5V | GND |
| M5Core2 (PORT C) | GPIO13 | GPIO14 | 5V | GND |
| M5CoreS3 (PORT C) | GPIO18 | GPIO17 | 5V | GND |
Model Size
Examples
Arduino
Video
- Unit-GPS SMA Product Introduction
| Product Comparison |
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 (CEP50) | 50 (CEP50) | 32 (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 | 23 seconds (cold), 1 second (hot) | 23 seconds (cold), 1 second (hot) | 35 seconds (cold), 1 second (hot) |
| Antenna | External active antenna | Onboard ceramic antenna | Onboard ceramic antenna |
| Signal Strength (under same conditions) | Beidou satellites: 18 | Beidou satellites: 8 | Beidou satellites: 5 |