GNSS modules are used for object tracking and navigation applications. The newest STMicro module is ROM based.
The module provides simultaneous access to the Glonass, Beidou and QZSS constellations in addition to GPS. The Teseo-LIV3R is available in a 9.7mm x 10.1mm 18-pin LCC package. It operates from power supplies ranging from 2.1 volts to 4.3 volts, and its operating temperature range is -40 ° C to +85 ° C.
Image from STMicroelectronics
The Teseo-LIV3R responds to NMEA (National Marine Electronics Association) proprietary commands, and has an attack sensitivity of –163dBm. The module incorporates STM’s Teseo lll positioning receiver.
Positioning accuracy within 1.5 meters with 50% probability of circular error is made possible by the built-in 26 MHz temperature compensated crystal oscillator. A dedicated 32KHz real time clock (RTC) oscillator guarantees a time to first correction (TTFF) of less than one second.
The new module joins ST’s Teseo-LIV3F module.
The Tesco-LIV3R provides three separate trip counters for odometer functionality. Configuration is possible using specific odometer commands during runtime. While enabled, the odometer reports the distance from the ground since the last reset. You can also activate a stand-alone message alarm when a programmed distance is reached.
There are eight alarmed and configurable circles for integrated geofencing. This function allows the Teseo-LIV3R receiver to emit a standalone NMEA message when the resolved GNSS position is near a specified circle, entering or leaving a circle. Geofencing can be configured and enabled in the firmware configurator or through the specific geofencing configuration command.
Block diagram for the Tesco-LIV3R. Image from STMicroelectronics
The Tesco-LIV3R supports two I / O interfaces, UART and I2C, with both supporting the NMEA protocol.
The device features numerous low-power modes, including a standby mode that consumes less than 15 µA, making it suitable for IoT applications where minimal battery consumption is required. These include:
- Tracking of goods
- Anti-theft systems
- Location of people and pets
- Vehicle tracking
- Emergency calls
- Fleet management
- Shared vehicle
- Public transport
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The module is compatible with STMicro’s STM32 open development environment, equipped with geolocation, smart tracking, and server-assisted GNSS.
There is also Teseo Suite, a PC tool for managing ST Teseo’s GNSS device capabilities, such as tuning configuration and fine-tuning performance.
Also, EVB-LIV3x evaluation board and X-NUCLEO-GNSS1A1 expansion board support hardware development.
Developers can also join the ST GNSS community to share information and increase their understanding of the field.
The module is also CE certified and complies with various radio related standards (e.g. Radio Equipment Directive (RED) 2014/53 / EU, ETSI EN 303 413 V1.1.1, EN62479: 2010, etc.) .
Around the industry
GNSS positioning devices are offered by many manufacturers. Here are two:
- Furuno offers a line of GNSS modules, including the GN-87. This device supports simultaneous access to GPS, GLONASS, SBAS, and QZSS. It is aimed at consumer, automotive and industrial applications.
- Sierra Wireless presents its XM and XA series of GNSS modules. An example, the XM1100 has a maximum refresh rate of ten times per second and draws approximately 18 mA. It supports GPS exclusively.