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