shantanoo-desai / mtk3339

Python library for Raspberry PI for Ultimate GPS based on MTK3339 with serial interface as sold by Adafruit

mtk3339

Python library for Raspberry PI for Ultimate GPS based on MTK3339 with serial interface as sold by Adafruit. The library helps to set different chip parameters in a sane way. Currently supports minimum functional set of commands:

• CMD_HOT_START - hot_start()
• CMD_WARM_START - warm_start()
• CMD_COLD_START - cold_start()
• CMD_FULL_COLD_START - cold_reset()
• SET_NMEA_UPDATERATE - set_nmea_update_rate()
• SET_NMEA_BAUDRATE - set_baudrate()
• API_SET_FIX_CTL - set_fix_update_rate()
• API_SET_NMEA_OUTPUT - set_nmea_output()
• SET_NAV_SPEED_TRESHOLD - set_nav_speed_threshold()

All functions are preforming basic range check to make sure values are accepted by MTK3339 as there is no check if a call was successful or not.

Example usage:

import mkt3339
gps = mt3339("/dev/ttyAMA0")
gps.set_fix_update_rate(800)
gps.set_nmea_update_rate(800)
gps.set_baudrate(115200)
gps.set_nmea_update_rate(1000)
gps.set_nav_speed_threshold(1.5)
gps.set_nmea_output(gll = 0, rmc = 1, vtg = 0, gga = 5, gsa = 5, gsv = 5)

Update

This fork is compatible with Python 3.5.1 and tests on Phytec MIRA Board

ChangeLog

• use functools to use reduce
• replace encode with str
• use str.encode() to send information on serial.write