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STM Mobile Developer Kits | heise online

Saturday, February 24th, 2018 | bitcoin updates

    There are two modems for the new developer boards. They each bring different network standards.
             NB-IoT is slowly getting rolling: Just in time for Embedded World, STMicroelectronics is showing a developer board with modem for the new Internet of Things network standard.


        Embedded developer STMicroeletronics has introduced two new mobile application development kits. In addition to a development board with an ARM processor, the kits include a cellular modem that is connected to the board via an expansion slot. ST offers a module for the "old" standards UMTS and GSM (P-L496G-CELL01) and one for the new narrowband LTE specifications NB-IoT and Cat. M1 (P-L496G-CELL02).
ARM as the arithmetic base of each kit is a board with STM32L496GI6, an ARM Cortex-M4 processor with 80 MHz clock rate, a MByte Flash and 320 kByte RAM. In addition, the processor has 8 MBit PSRAM available. Programming is done via micro USB, the power supply as well.


          On the bottom, the board has a micro SD slot, an audio jack port and space for Arduino hats.
    There is also a Micro-SD slot and an 8-bit camera interface on the board. The audio chip of the board is used either via a 3.5 mm jack or the soldered MEMS microphones. On the underside of the board are also connection strips for daughter boards in Arduino format. Another micro USB host port allows the processor to address USB devices.
IoT-LTE in the luggage The kits differ in each case over the supplied modem, both from Quectel. For UMTS and GSM networks ST supplies the UG96. It operates in UMTS networks at 800, 850, 900 and 2100 MHz and is therefore almost universally applicable. In the downlink it delivers a maximum of 7.2 MBit / s, in the uplink 5.7 MBit / s. In GSM networks at 850, 900, 1800 and 1900 MHz is at 296 kbit / s and 236 kbit / s respectively.
For NB-IoT and Cat. M1 you get the Quectel BG96. It operates in FDD networks at 2100, 1900, 1800, 1700, 900, 850, 800 and 700 MHz, as well as in TDD networks at 1900 MHz. The modems are connected via a slot to the developer board and are also supplied with power. The SIM slot is located on the back.
The BG96 also controls GSM. This combination is particularly interesting for developers who want to develop applications for NB-IoT but still have to wait for the actual network access. The case may occur if the networks are either not yet available or the operators still do not grant access. In Germany, both Telekom and Vodafone and Telefonica are currently building NB IoT networks.
STMicroelectronics has not yet announced a price for the boards.




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