ST Teseo III and Teseo GNSS Modules User Guide

ST Teseo III and Teseo GNSS Modules

Introduction

• Teseo III GNSS chips and modules also embed a Geofence subsystem able to notify the host if the current position falls inside/outside a set of pre-programmed circles.
• The Geofence subsystem supports
• Up to 8 configurable circles (4 circle configurable in the firmware)
• Polling and/or asynchronous notification
• The Geofence subsystem can be programmed using the NMEA command API

Geofence runtime polling mode

Configure a circle:

• $PSTMGEOFENCECFG,,,,,,
• $PSTMGEOFENCECFG,0,1,1,37.441699,15.0602,150

Check the Geofence status:

• $PSTMGEOFENCEREQ
• $PSTMGEOFENCEREQ

Replay Teseo III:

• $PSTMGEOFENCESTATUS,,,,…,
• $PSTMGEOFENCESTATUS,092007,20200110,3,0,0,0,0,0,0,0

Circle–status meaning

• 0: Status unknown: Circle disabled or No PVT solution available (i.e: during power-on)

1. PVT solution outside of the circle
2. PVT solution outside of the circle boundary
3. PVT solution inside of the circle

Prepare the geofence async mode

Configuring the firmware enabling the async $PSTMGEOFENCE message in the message-list (only once)

• $PSTMSETPAR,1228,80000,1
• $PSTMSAVEPAR
• $PSTMSRR

Geofence runtime async mode

Configure a circle:

• $PSTMGEOFENCECFG,,,,,,
• $PSTMGEOFENCECFG,0,1,1,37.441699,15.0602,150

When PVT solution updates a circle-status (i.e.: PVT solution enter/exit from a circle),

• Teseo III will send the message:
• $PSTMGEOFENCE,144553,20200109,0,37.441703,15.059990,140.0,10.7,10.2,3*1E
• Take care that the $PSTMGEOFENCE is sent only once on circle-status-update

Documents & related resources

Teseo III: Webpage

• Datasheets

Teseo Modules: Webpage

• Datasheets

Teseo-Suite: Webpage

• Datasheet
• Install program
• User manual and Training material

availableonst.Com

References

• TESEO-SUITE - PC software tool to manage, configure and evaluate the performances of Teseo GNSS family - STMicroelectronics
• GNSS Receiver IC, System-On-Chip (SoC) for GPS/Beidou/Galileo/Glonass/QZSS - STMicroelectronics
• GNSS Modules - STMicroelectronics

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