Grove GPS模組 適用於 Arduino 與 Raspberry Pi

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Grove GPS模組 適用於 Arduino 與 Raspberry Pi

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Grove – GPS模組是一款低成本及可程式設計的GPS模組，可用於手持設備GPS資料的採集。模組採用串口通信，可通過串口進行資料的讀取。它設有一個50通道的u-blox 5定位引擎，首次定位時間（TTFF）小於1s。跟蹤和採集的靈敏度均達到-160dBm，適用於個人導航及位置服務的專案。

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商品說明

Grove GPS 模組是一款低成本及可程式設計的GPS模組，可用於手持設備GPS資料的採集。模組採用串口通信，可通過串口進行資料的讀取。它設有一個50通道的u-blox 5定位引擎，首次定位時間（TTFF）小於1s。跟蹤和採集的靈敏度均達到-160dBm，適用於個人導航及位置服務的專案。

 

規格參數

  • 輸入電壓：5V
  • 串列傳輸速率：4800 – 57600
  • Grove介面
  • 支援NMEA及U-Blox 6協定
  • 低功耗
  • 串列傳輸速率可配置

 

 

Introduction

This Grove – GPS module is a cost-efficient and field-programmable gadget armed with a SIM28 (U-blox 6 is old version) and serial communication configuration. It features 22 tracking / 66 acquisition channel GPS receiver. The sensitivity of tracking and acquisition both reach up to -160dBm, making it a great choice for personal navigation projects and location services, as well as an outstanding one among products of the same price class.
Model:SEN10752P

Features

  • Input Voltage: 3.3/5V
  • BaudRate: 4800 – 57600( u-blox version)
  • BaudRate: 9600 – 115200(SIM28 version)
  • Default BaudRate: 9600
  • Supports NMEA and U-Blox 6 protocols. ( Jan,10 2014 before, after that SIM28 instead)
  • Low power consumption
  • Baud rates configurable
  • Grove compatible interface

Usage

With Arduino

This sample simply reads from the GPS using software serial and sends it back out on the serial port.

  • Connect the Grove-GPS to Digital I/O 2 on the Grove – Base Shield using a Grove Universal 4 pin cable
// link between the computer and the SoftSerial Shield
//at 9600 bps 8-N-1
//Computer is connected to Hardware UART
//SoftSerial Shield is connected to the Software UART:D2&D3

#include <SoftwareSerial.h>

SoftwareSerial SoftSerial(2, 3);
unsigned char buffer[64];                   // buffer array for data receive over serial port
int count=0;                                // counter for buffer array

void setup()
{
    SoftSerial.begin(9600);                 // the SoftSerial baud rate
    Serial.begin(9600);                     // the Serial port of Arduino baud rate.
}

void loop()
{
    if (SoftSerial.available())                     // if date is coming from software serial port ==> data is coming from SoftSerial shield
    {
        while(SoftSerial.available())               // reading data into char array
        {
            buffer[count++]=SoftSerial.read();      // writing data into array
            if(count == 64)break;
        }
        Serial.write(buffer,count);                 // if no data transmission ends, write buffer to hardware serial port
        clearBufferArray();                         // call clearBufferArray function to clear the stored data from the array
        count = 0;                                  // set counter of while loop to zero


    }
    if (Serial.available())                 // if data is available on hardware serial port ==> data is coming from PC or notebook
    SoftSerial.write(Serial.read());        // write it to the SoftSerial shield
}

void clearBufferArray()                     // function to clear buffer array
{
    for (int i=0; i<count;i++)
    { buffer[i]=NULL;}                      // clear all index of array with command NULL
}
  • Install u-center. Upload the code below to your Arduino/Seeeduino and then open u-center.
1) Click Receiver -> Port and select the COM port that the Arduino is using.
2) Click Receiver -> Baudrate and make sure 9600 is selected.
3) Click View -> Text Console and you should get a window that will stream NMEA data.
4) Open the serial monitor,You can see as show below:
GPS result.jpg
  • To View data in Google Earth:
1) Click File -> Database Export -> Google Earth KML
2) This Should launch Google Earth with the history that was captured by u-center.
3) Alternatively, data can be recorded by pressing the red circle on the toolbar which will then ask you where you want to save the record.
4) When you have captured enough data, click the black square to stop recording.
5) You can then convert the .ubx file generated to KML by using uploading the ubx file to GPSVisualizer

With Raspberry Pi

1.You should have got a raspberry pi and a grovepi or grovepi+.
2.Connection

  • Plug Grove GPS into grovepi socket RPISER.

4.Navigate to the demos’ directory:

   cd yourpath/GrovePi/Software/Python/
  • To see the code
   nano grove_gps.py   # "Ctrl+x" to exit #

import serial, time
import smbus
import math
import RPi.GPIO as GPIO
import struct
import sys

ser = serial.Serial('/dev/ttyAMA0',  9600, timeout = 0)	#Open the serial port at 9600 baud
ser.flush()

class GPS:
	#The GPS module used is a Grove GPS module https://www.seeedstudio.com/depot/Grove-GPS-p-959.html
	inp=[]
	# Refer to SIM28 NMEA spec file https://www.seeedstudio.com/wiki/images/a/a0/SIM28_DATA_File.zip
	GGA=[]

	#Read data from the GPS
	def read(self):	
		while True:
			GPS.inp=ser.readline()
			if GPS.inp[:6] =='$GPGGA': # GGA data , packet 1, has all the data we need
				break
			time.sleep(0.1)
		try:
			ind=GPS.inp.index('$GPGGA',5,len(GPS.inp))	#Sometimes multiple GPS data packets come into the stream. Take the data only after the last '$GPGGA' is seen
			GPS.inp=GPS.inp[ind:]
		except ValueError:
			print ""
		GPS.GGA=GPS.inp.split(",")	#Split the stream into individual parts
		return [GPS.GGA]
		
	#Split the data into individual elements
	def vals(self):
		time=GPS.GGA[1]
		lat=GPS.GGA[2]
		lat_ns=GPS.GGA[3]
		long=GPS.GGA[4]
		long_ew=GPS.GGA[5]
		fix=GPS.GGA[6]
		sats=GPS.GGA[7]
		alt=GPS.GGA[9]
		return [time,fix,sats,alt,lat,lat_ns,long,long_ew]

g=GPS()
f=open("gps_data.csv",'w')	#Open file to log the data
f.write("name,latitude,longitude\n")	#Write the header to the top of the file
ind=0
while True:
	try:
		x=g.read()	#Read from GPS
		[t,fix,sats,alt,lat,lat_ns,long,long_ew]=g.vals()	#Get the individial values
		print "Time:",t,"Fix status:",fix,"Sats in view:",sats,"Altitude",alt,"Lat:",lat,lat_ns,"Long:",long,long_ew
		s=str(t)+","+str(float(lat)/100)+","+str(float(long)/100)+"\n"	
		f.write(s)	#Save to file
		time.sleep(2)
	except IndexError:
		print "Unable to read"
	except KeyboardInterrupt:
		f.close()
		print "Exiting"
		sys.exit(0)

5.Run the demo.

   sudo python grove_gps.py

6.Result

  • Note: GPS is better outdoor using, recommand you to put your raspberry pi to the window or any place outdoor.

Grovepi gps 00.jpg

SIM28 module Note:

1. GPS Bee has change the module as SIM28 which the same footprint as origin version.
2. You should use “SIMCom GPS DEMO” tools to receive SIM28 module data.
3. Open SIMCom_GPS_DEMO tools, go to Module->properties->module->select SIM28.
SIM28 module select.jpg

4. Open SIMCom_GPS_DEMO tools, go to Module->connect. Select the serial port which the GPS module used.

SIM28 module tools pannel.jpg

Version Tracker

 

Revision Descriptions Release
GPS Bee kit (with Mini Embedded Antenna) – origin
v1.1 change the GPS module to SIM28 Dec 5,2013

 

DOWNLOAD

Arduino 範例

This sample simply reads from the GPS using software serial and sends it back out on the serial port.

  • Connect the Grove-GPS to Digital I/O 2 on the Grove – Base Shield using a Grove Universal 4 pin cable.
  • Upload the code below. Please click here if you do not know how to upload.
// link between the computer and the SoftSerial Shield
//at 9600 bps 8-N-1
//Computer is connected to Hardware UART
//SoftSerial Shield is connected to the Software UART:D2&D3

#include <SoftwareSerial.h>

SoftwareSerial SoftSerial(2, 3);
unsigned char buffer[64];                   // buffer array for data receive over serial port
int count=0;                                // counter for buffer array

void setup()
{
    SoftSerial.begin(9600);                 // the SoftSerial baud rate
    Serial.begin(9600);                     // the Serial port of Arduino baud rate.
}

void loop()
{
    if (SoftSerial.available())                     // if date is coming from software serial port ==> data is coming from SoftSerial shield
    {
        while(SoftSerial.available())               // reading data into char array
        {
            buffer[count++]=SoftSerial.read();      // writing data into array
            if(count == 64)break;
        }
        Serial.write(buffer,count);                 // if no data transmission ends, write buffer to hardware serial port
        clearBufferArray();                         // call clearBufferArray function to clear the stored data from the array
        count = 0;                                  // set counter of while loop to zero


    }
    if (Serial.available())                 // if data is available on hardware serial port ==> data is coming from PC or notebook
    SoftSerial.write(Serial.read());        // write it to the SoftSerial shield
}

void clearBufferArray()                     // function to clear buffer array
{
    for (int i=0; i<count;i++)
    { buffer[i]=NULL;}                      // clear all index of array with command NULL
}
  • Install u-center. Upload the code below to your Arduino/Seeeduino and then open u-center.
1) Click Receiver -> Port and select the COM port that the Arduino is using.
2) Click Receiver -> Baudrate and make sure 9600 is selected.
3) Click View -> Text Console and you should get a window that will stream NMEA data.
4) Open the serial monitor,You can see as show below:
GPS result.jpg
  • To View data in Google Earth:
1) Click File -> Database Export -> Google Earth KML
2) This Should launch Google Earth with the history that was captured by u-center.
3) Alternatively, data can be recorded by pressing the red circle on the toolbar which will then ask you where you want to save the record.
4) When you have captured enough data, click the black square to stop recording.
5) You can then convert the .ubx file generated to KML by using uploading the ubx file to GPSVisualizer

 

Raspberry Pi 範例

1.You should have got a raspberry pi and a grovepi or grovepi+.
2.You should have completed configuring the development enviroment, otherwise follow here.
3.Connection

  • Plug Grove GPS into grovepi socket RPISER.

4.Navigate to the demos’ directory:

   cd yourpath/GrovePi/Software/Python/
  • To see the code
   nano grove_gps.py   # "Ctrl+x" to exit #

import serial, time
import smbus
import math
import RPi.GPIO as GPIO
import struct
import sys

ser = serial.Serial('/dev/ttyAMA0',  9600, timeout = 0)	#Open the serial port at 9600 baud
ser.flush()

class GPS:
	#The GPS module used is a Grove GPS module https://www.seeedstudio.com/depot/Grove-GPS-p-959.html
	inp=[]
	# Refer to SIM28 NMEA spec file https://www.seeedstudio.com/wiki/images/a/a0/SIM28_DATA_File.zip
	GGA=[]

	#Read data from the GPS
	def read(self):	
		while True:
			GPS.inp=ser.readline()
			if GPS.inp[:6] =='$GPGGA': # GGA data , packet 1, has all the data we need
				break
			time.sleep(0.1)
		try:
			ind=GPS.inp.index('$GPGGA',5,len(GPS.inp))	#Sometimes multiple GPS data packets come into the stream. Take the data only after the last '$GPGGA' is seen
			GPS.inp=GPS.inp[ind:]
		except ValueError:
			print ""
		GPS.GGA=GPS.inp.split(",")	#Split the stream into individual parts
		return [GPS.GGA]
		
	#Split the data into individual elements
	def vals(self):
		time=GPS.GGA[1]
		lat=GPS.GGA[2]
		lat_ns=GPS.GGA[3]
		long=GPS.GGA[4]
		long_ew=GPS.GGA[5]
		fix=GPS.GGA[6]
		sats=GPS.GGA[7]
		alt=GPS.GGA[9]
		return [time,fix,sats,alt,lat,lat_ns,long,long_ew]

g=GPS()
f=open("gps_data.csv",'w')	#Open file to log the data
f.write("name,latitude,longitude\n")	#Write the header to the top of the file
ind=0
while True:
	try:
		x=g.read()	#Read from GPS
		[t,fix,sats,alt,lat,lat_ns,long,long_ew]=g.vals()	#Get the individial values
		print "Time:",t,"Fix status:",fix,"Sats in view:",sats,"Altitude",alt,"Lat:",lat,lat_ns,"Long:",long,long_ew
		s=str(t)+","+str(float(lat)/100)+","+str(float(long)/100)+"\n"	
		f.write(s)	#Save to file
		time.sleep(2)
	except IndexError:
		print "Unable to read"
	except KeyboardInterrupt:
		f.close()
		print "Exiting"
		sys.exit(0)

5.Run the demo.

   sudo python grove_gps.py

6.Result

  • Note: GPS is better outdoor using, recommand you to put your raspberry pi to the window or any place outdoor.

Grovepi gps 00.jpg

SIM28 module Note:

1. GPS Bee has change the module as SIM28 which the same footprint as origin version.
2. You should use “SIMCom GPS DEMO” tools to receive SIM28 module data.
3. Open SIMCom_GPS_DEMO tools, go to Module->properties->module->select SIM28.
SIM28 module select.jpg

4. Open SIMCom_GPS_DEMO tools, go to Module->connect. Select the serial port which the GPS module used.

SIM28 module tools pannel.jpg

 

 

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