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Archived:How to read GPS data in PySymbian

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Archived.pngAquivado: Este artigo foi arquivado, pois o conteúdo não é mais considerado relevante para se criar soluções comerciais atuais. Se você achar que este artigo ainda é importante, inclua o template {{ForArchiveReview|escreva a sua justificativa}}.

All PySymbian articles have been archived. PySymbian is no longer maintained by Nokia and is not guaranteed to work on more recent Symbian devices. It is not possible to submit apps to Nokia Store.

This code snippet explains how to use the positioning module to get information from an internal or external GPS module in PySymbian.

Article Metadata
Compatibility
Platform(s): S60 2nd Edition FP 2, S60 3rd Edition
Article
Keywords: positioning
Created: ilpo55 (28 Jul 2008)
Last edited: hamishwillee (31 May 2013)

Prerequisites

Get a GPS lock at least once before using this code to maximize efficiency.

Code

import e32, appuifw, positioning
 
 
def gps_init():
#This function will start the updating of global variable (dictionary) 'gps_data' every 0.2 sec.
#0.2 sec comes form 'interval = 200000' set according to your needs
#This function uses callback funtion gps
global gps_data
#First this fills the gps_data with 0.0 so that there is something before the first gps update
gps_data = {
'satellites': {'horizontal_dop': 0.0, 'used_satellites': 0, 'vertical_dop': 0.0, 'time': 0.0,'satellites': 0, 'time_dop':0.0},
'position': {'latitude': 0.0, 'altitude': 0.0, 'vertical_accuracy': 0.0, 'longitude': 0.0, 'horizontal_accuracy': 0.0},
'course': {'speed': 0.0, 'heading': 0.0, 'heading_accuracy': 0.0, 'speed_accuracy': 0.0}
}
try:
positioning.select_module(positioning.default_module())
positioning.set_requestors([{"type":"service","format":"application","data":"gps_app"}])
positioning.position(course=1,satellites=1,callback=gps, interval=200000,partial=0)
e32.ao_sleep(3)
except:
appuifw.note(u'Problem with GPS','error')
 
def gps(event):
global gps_data
gps_data = event
 
def gps_stop():
#This function stops GPS
try:
positioning.stop_position()
except:
appuifw.note(u'Problem with GPS','error')
 
 
#Testing
gps_init()
count = 0
while True:
count = count + 1
sat = gps_data['satellites']['used_satellites']
pos_lat = gps_data['position']['latitude']
pos_long = gps_data['position']['longitude']
speed = gps_data['course']['speed']
print count, sat, pos_lat, pos_long,speed
e32.ao_sleep(1)
This page was last modified on 31 May 2013, at 04:05.
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