telit gps modules 4 m2m platforms seminar 2007

8/7/2019 Telit GPS Modules 4 M2M Platforms Seminar 2007

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TELIT GPS MODULES

Telit @ M2M Platforms Seminarwww.m2m-platforms.come-mail: [email protected]


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Author: Stefano Radetich

What we decided to do

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GPS Modules

TWO FAMILIES WITH

GPS RECEIVER

EMBEDDED

DIFFERENTFORM FACTOR

SAME

PERFORMANCES


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SiRF

SiRFstar III GPS Single Chip

High Performance GPS in a Small Form Factor


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Why we have chosen SiRF

Next Generation GPS Performance

The SiRFstar III has the performance required to meet the industrys toughest

challenges. The 200,000+ effective correlators allow the SiRFstar III to acquire

in only seconds even in low signal levels.

As part of SiRF's patented multi-mode GPS the SiRFstar III can acquire

signal levels as low as -159dBm. The SiRFstar III supports

real-time navigation in urban canyons as well as high sensitivity

acquisition needed for indoor environments.


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GM862-GPS

Designed for:

Industrial Application Low to Medium volume applications

Fleet management and tracking

applications

Main Characteristics:

Extremely reliable product

Pin to Pin backward compatible

RoHS compliant

On Board SIM holder

CE,GCF,FCC,PTCRB,IC Approvals

GPS receiver embedded


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GM862-GPS

Core-Engine is the GM862-QUAD

Quad-band, GPRS Class 10 device, SupplyVoltage Range: 3,4/4,2 V DC

RoHS compliant

Serial Port Multiplexer

SIM Access Profile

SiRF Star III GPS receiver built-in.

GPS NMEA 0183 output format

Control via AT commands GSM and GPS

Footprint compatible to GM862-Family

Extended Temperature Range: -30/ +80C

Extended RF Sensitivity

MMCX connector for GSM and GPSantenna


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GE863-GPS

Designed for:

Industrial & Consumer Application Medium to high volume Applications

Fleet management and trackingapplications

Main Characteristics:

Small dimension (41.4x31.4x3,6 mm, 9gr)

BGA component No connectors, reduced application BoM

CE,GCF, FCC, PTCRB, IC Approvals

GPS receiver embedded


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GE863-GPS

Core-Engine is the GE863-QUAD

Quad-band, GPRS Class 10 device RoHS compliant

Supply Voltage Range: 3,4/4,2 V DC

Serial Port Multiplexer

SIM Access Profile SiRF Star III GPS receiver built-in.

GPS NMEA 0183 output format

NMEA data via AT-command, or outputBinary/NMEA directly from GPS

Extended RF Sensitivity

Dimensions: 41.4 x 31.4 x 3.6 mm, GE863-QUAD compatible

Weight: 11 gram


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Features

EASY SCAN

GSM network scan without SIM card inserted

EASY CAMERA

Direct Support of VGA camera (JPEG) & E-mail / FTP of the photo

Jamming Detect & Report

Detection of Jamming of the GSM network and subsequent Reportvia GPIO/serial line and/or network

EASY GPRS& FTP

Enhanced Integrated TCP/IP stack TCP/UDP stack

FTP client

Built-in firewall

Set up with AT commands


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Features

EASY SCRIPT EXTENSION Python interpreter

The Easy Script Extension is a feature which allows driving the modem "internally",writing the application controls directly in a nice high level language: Python.

In addition to the existing built-in modules Telit added the GPS built-in module.

GPS built-in module. It is the interface between Python and mobile internal GPScontroller. Its necessary to use GPS built-in module to handle GPS controller withoutusing existing dedicated AT commands through MDM built-in module.


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GE863-GPS

GPS CORE

GSM/GPRS

CORE

GSM RFPADS

GPS RF PADS


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GM862-GPS

GPS RFCONN.

GSM RFCONN.

GSM/GPRS

CORE

GPS CORE


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GM862-GPS vs. GE863-GPS

Power consumption

Nominal Supply Voltage: 3.8 V

Supply voltage range: 3.4 V - 4.2 V Max Peak current consumption (impulsive): 1.9 A

GSM Max Average current consumption during GPRS transmission (avg.): 500 mA

GSM Max Average current consumption during VOICE/CSD transmission (avg.): 270 mA

GSM Average current during Power Saving: 4 mA GSM Average current during idle (Power Saving disabled) 19 mA

GPS Max Peak current consumption: 80 mA

GPS Max Average current consumption during Tracking: 60 mA

GPS Average current during Power Saving: 1 mA GPS antenna consumption (external active antenna) 20 mA

NB: The total power consumption of the modules is the sum of the consumptions of

GSM and GPS part.


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GM862-GPS vs. GE863-GPS

Mounting the GPS modules on the Application Board Remember to use the suggested connectors by Telit (Molex 50 pin,

RF MMCX)

When mounting the Telit GM862-GPS on your board, take care ofsoldering the module shielding reeds on a ground plane or signal.

Be very careful when connecting the Telit GM862 module RF

connector. The Telit GM862 module RF connector can be damagedif not connected with the proper antenna RF connector. Theminimum number of insertion cycles is recommended.

The Telit GE863-GPS has been designed in order to be compliantwith a standard lead-free SMT process.


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GE863-GPS Serial Lines

80 BGA BALLS ARRAY

External bridge

AT$GPSNMUN

GSM

ASC0 ASC1

GPS

SIRF

BINARYNMEA

AT$GPSACP $GPSACP: 00150.040N.023.033E


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50 PIN INTERFACE CONNECTOR

GM862-GPS Serial Lines

AT$GPSNMUN

GSM GPS

ASC0 ASC1 NMEASIRF

BINARY

AT$GPSACP $GPSACP: 00150.040N.023.033E


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GPS Antennas

The GE863-GPS and GM862-GPS modules are not provided with an internal

LNA amplifier. The use of an active antenna is important to achieve a good

performance.

The module is provided of an Antenna supply circuit with the following

characteristics:

Supply voltage referred to VBATT (3.4 to 4.2 V DC, typical 3.8V)

Supply enable controlled internally by the BB

Current measurement circuit (readable also with AT commands)

Voltage measurement circuit (readable also with AT commands)

HW Protection for Antenna Short Circuit (if consumption exceeds 40mA)


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Evaluation Kit


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Evaluation KitEVK2 for Telit GSM/GPRS-Modules

Designed for:

All Telit modules

Different interface boardsGE863, GE864, GC864,

camera application Full featured evaluation kit

Programming/updating

Interfaces for:

2 x DB9 RS-232 connector

USB 1.1 port

5 - 40 V DC automotive setup

3.8V DC laboratory supply

Portable setup from re-chargeable Lithium Ion battery

External SIM card reader

Full I/O managing, oscilloscopeports, analogue voice ports for

hands free and headset

The package includes:

Power supply cable

USB port cable

Antenna and cables for

immediate connection to a PC


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Available AT Commands

The Telit GPS modules can be driven via the serial interface using

the standard AT commands. Moreover Telit wireless module family supports also

Telit proprietary AT commands for special purposes.

GPS Controller Management Commands

AT$GPSP GPS controller power management

Manage power-up or down of the GPS controller.

AT$GPSD GPS Device Type Set

Set command defines which GPS device is connected to the module.

It dedicates the Serial port #1 of the module (TRACE) to receive

the GPS strings from the GPS module.


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AT$GPSPS Set The GPS Module In Power Saving Mode

Set command allows to set the GPS module in Power saving mode.

The GPS receiver can operate in three modes:

full power mode, power saving disabled;

trickle power mode; push-to-fix mode;

AT$GPSWK Wake Up GPS From Power Saving Mode

Execution command allows to wake up the GPS module if setin sleeping mode due to power saving.


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GPS Antenna Configuration

AT$GPSAT GPS Antenna Type Definition

Select the GPS antenna used.

AT$GPSAV GPS Antenna Supply Voltage Readout

Measure the GPS Antennas supply voltage

AT$GPSAI GPS Antenna Current Readout

Report the GPS Antennas Current consumption.

AT$GPSAP GPS Antenna Protection

Activate an automatic protection in case of high current consumption of GPS

antenna. The protection disables the GPS antenna supply voltage.

C


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NMEA Data Configuration

AT$GPSS GPS NMEA Serial Port Speed

Set command allows to select the speed of the NMEA serial port;

4800 - (default), 9600, 19200, 38400, 57600.

AT$GPSNMUN Unsolicited NMEA Data ConfigurationActivate an Unsolicited streaming of GPS data (in NMEA format)

through the standard GSM serial port (AT).

Define which NMEA sentences will be available.

AT$GPSACP Get Acquired Position

Get the information about the last position stored by the GPS receiver.

A il bl AT C d


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GPS Parameters

AT$GPSSAV Save GPS Parameters Configuration.

Save the current configuration in the EEPROM memory of the module.

AT$GPSRST Restore to Default the GPS Parameters.

Restore the GPS parameters to the Factory Default configuration andto store them in the EEPROM memory of the module.

NB: In order to activate the new configuration the module must be restarted

after the command.

A il bl AT C d


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GPS Special Commands

AT$GPSCON Direct Access to GPS Module

Execution command allows to set the GSM baseband in transparent mode

in order to have a direct access to the serial port of the GPS module. The

GSM module will transfer directly the received data to the GPS module,

without checking or elaborating them.

AT$GPSPRG Set The GPS Module In Programming Mode

Execution command allows to switch on the GPS part in BOOT mode and

set the GSM processor in Transparent Mode, in order to permitthe reprogramming of the GPS flash memory.

A il bl AT C d


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AT$GPSSW - GPS Software Version

Provides the SW version of the GPS Module.

AT$GPSR - GPS Reset

Execution command allows to reset the GPS controller:

Hardware reset (Default factory GPS values)

Cold start (No Almanac, No Ephemeris)

Warm start (No ephemeris)

Hot start (with stored Almanac and Ephemeris)


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telit gps modules 4 m2m platforms seminar 2007

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