GM862-GPS Software User Guide - SemiconductorStore.com

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GM862-GPS Software User Guide1vv0300729 Rev. 4 - 24/01/07OKNOTE: Due to the fact that VAUX1 could also be used to supply the Camera, if this device is switchedon the command AT$GPSP=0 will not be executed5.6.2 GPS RESETWith the command AT$GPSR= is possible to reset the GPS module.Parameter:0 - Hardware reset: the GPS receiver is reset and restarts by using the values stored in the internalmemory of the GPS receiver.1 - Coldstart (No Almanac, No Ephemeris): this option clears all data that is currently stored in theinternal memory of the GPS receiver including position, almanac, ephemeris, and time. The storedclock drift however, is retained. It is available in controlled mode only.2 - Warmstart (No ephemeris): this option clears all initialization data in the GPS receiver andsubsequently reloads the data that is currently displayed in the Receiver Initialization Setupscreen. The almanac is retained but the ephemeris is cleared. It is available in controlled modeonly.3 - Hotstart (with stored Almanac and Ephemeris): the GPS receiver restarts by using the valuesstored in the internal memory of the GPS receiver; validated ephemeris and almanac. It is available incontrolled mode only.Example :Let’s suppose to perform a cold start of the GPS receiver.AT$GPSR=1OKThe Receiver will clear all the parameters in its memory and it will start a new scanning of theavailable satellites.Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 104 of 111
5.6.3 GPS ANTENNA MANAGEMENTGM862-GPS Software User Guide1vv0300729 Rev. 4 - 24/01/07The GPS receiver needs an active antenna. This antenna could be supplied by the module.By default the antenna supply is set to ON (the provided voltage is related to VBATT so the GPSantenna have to accept a range of supply voltage from 3.4 to 4.2V DC)With the AT$GPSAT command is possible to define this setting.The syntax is AT$GPSAT=Parameter:0 - GPS Antenna not supplied by the module1 - GPS Antenna supplied by the module (default)NOTE: if current is 0, either $GPSAV? and $GPSAI? have no meaning.5.6.3.1 GPS Antenna Current and Voltage ReadoutWith the commands AT$GPSAV? and AT$GPSAI? is possible to measure the supply voltage andconsumption of the GPS antenna.The answer is (in the case of 3.8V dc measurement)$GPSAV:3800OKFor the current with the commnand AT$GPSAI? The answer is :[, ] the measured current in mA (10 GPS antenna OK1 GPS antenna consumption out of the limitsSTATUS is available only if the SW antenna protection is activated.$GPSAI:040,0OKReproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 105 of 111
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Command Time-Out (Seconds)#SHDN 10#
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+CME ERROR: 17PIN2 is required to c
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AT+CPBR=7the response may look like
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3.1.5 Phonebook entry DeleteAs firs
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