How to use GNSS modules to create location aware smart city solutions
of GPS, Galileo, and GLONASS GNSS signals (Figure 4). Using three constellations at once results in high position accuracy in challenging environments such as urban canyons or when receiving weak signals. To speed positioning and improve accuracy, the SAM- M8Q supports augmentation functions, including a quasi-zenith satellite system (QZSS), GPS aided GEO augmented navigation (GAGAN), and indoor messaging system (IMES), together with wide area augmentation system (WAAS), European geostationary navigation overlay service (EGNOS), and the MTSAT satellite augmentation system (MSAS). The SAM-M8Q module can also use the u-blox AssistNow assistance service that provides GNSS broadcast parameters, including ephemeris data, almanac, plus time or rough position, to reduce the TTFF significantly. The extended validity of AssistNow Offline data (up to 35 days) and AssistNow Autonomous data (up to 3 days) supports faster TTFF even after an extended time.
3GPP power saving mode (PSM) and extended discontinuous reception (eDRx) for power- sensitive applications. PSM sleep times tend to be much longer than eDRX. These longer sleep times allow the device to enter into a deeper, lower power sleep mode than eDRX. PSM sleep power is under ten microamps, while eDRX sleep power is up to 30 microamps. TX62 security features include secure key storage and certificate handling to support trustful enrolment in Cloud platforms while Figure 4: The SAM-M8Q module supports concurrent reception of up to three GNSS sources (GPS, Galileo, GLONASS). Image source: u-blox Figure 5: The GNSS 4 click board carries the SAM-M8Q patch antenna module from u-blox. Image source: DigiKey
The PIC-IoT WG development board provides Google Cloud IoT users a way to accelerate the development of secure Cloud-connected applications. In addition, the PIC- IoT WG board provides designers with analytics and machine learning tools. Multi-constellation GNSS plus wireless connectivity For small LAS devices such as trackers that can benefit from multi-constellation GNSS support (GPS/Galileo/ GLONASS) and global LPWAN LTE connectivity from a single module leveraging Rel. 14-second generation Cat. M1/ NB1/NB2, designers can turn to the Cinterion TX62 module from Thales (Figure 6). Solution size can be further optimised using the module’s flexible architecture that supports running applications using a host processor or inside the module using the integrated processor. The TX62 supports
This Internet of Things (IoT) Google Cloud development
platform provides a simple way to connect and secure PIC MCU- based applications. GNSS 4 click from MikroElektronika contains a SAM-M8Q module and is designed with the PIC-IoT WG Development Board from Microchip Technology to speed the development of LAS smart city applications (Figure 5).
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