Matrix - GPS
From FriendlyELEC WiKi
1 Introduction
The matrix GPS module is a small GPS module with high performance. It can be used in navigation devices, four-axle drones and etc.
- U-blox NEO-7M GPS module;
- MAXIM’s high gain LNA chip and high performance porcelain antenna;
- Support GPS and GLONASS(Russia's Navigation System);
- Serial Communication: baud rate 为9600, 8 data bits, no parity, 1 stop bit;
- Horizontal position accuracy: 2.5m CEP;
- Max navigation update rate: 10Hz;
- Time To First Fix: 30S;
- Sensitivity-Tracking & Navigation: -161dBm;
- Sensitivity-Cold Start: -148dBm;
- Protocol: NMEA(default)/UBX Binary;
- Operational Limits – Velocity: 500m/s;
- Operational Limits- Altitude: 50000m;
- TXD/RXD resistance: 510 Ohm;
- Working Temperature: -40 degree Celsius ~ 85 degree Celsius;
- Supply Voltage:: 5.0V;
- Supply Current: 22mA;
- Onboard LED. After the module is powered on the LED will turn on. If the module gets GPS data successfully the LED will be flashing
2 特性
- UART接口
- 体积小巧
- PCB尺寸（mm）：40x40
- 引脚说明:
| 名称 | 描述 |
| RXD | 串口接收 |
| TXD | 串口发送 |
| 5V | 电源5V |
| GND | 地 |
3 工作原理
- GPS(Global_Positioning_System)即全球卫星导航定位系统，可向全球用户提供连续、实时、高精度的三维位置、三维速度和时间信息。
- GPS定位系统包括GPS卫星星座、地面监控系统、GPS信号接收机三部分组成。
- GPS定位原理是利用高空中的GPS卫星，向地面发射L波段的载频无线电测距信号，地面上的用户接收机实时地连续接收，并计算出接收机天线所在的位置。
4 与NanoPi 2连接使用
4.1 硬件连接
参考下图连接模块Matrix-GPS和NanoPi 2：
GPS_NanoPi_2
连接说明：
| Matrix-GPS | NanoPi 2 |
| RXD | Pin8 |
| TXD | Pin10 |
| 5V | Pin4 |
| GND | Pin6 |
