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February 24, 2017 – The world's latest authorized distribution of semiconductors and electronic components, Mouser Electronics, is the first to ship STMicroelectronics (ST)'s STM32 LoRaWANTM Discovery Board. The new Discovery Kit is a platform that can be used with the Arduino-compatible I-NUCLEO-LRWAN1 STM32 LoRaTM expansion board ordered from MOUSERS to understand and evaluate solutions based on LoRa and FSK/OOK radio frequency (RF) communications.
The ST STM32 LoRaWAN Discovery Kit, which is exclusively stocked by MOUSER, is based on the all-in-one open Murata Type ABZ module and supports low-power wide area network (LPWAN) and LoRaWAN remote wireless protocols. The Type ABZ module contains an STM32L072 ARM® Cortex®? M0+ microcontroller with 192 KB of flash, 20 KB of RAM and 6 KB of EEPROM. The STM32L0 ultra-low power microcontroller features a low power design for battery-powered applications and energy harvesting applications.
ST's I-NUCLEO-LRWAN1 STM32 LoRa expansion board includes a LoRaWAN module based on the STM32L052 microcontroller, an SMA connector, a 50Ω antenna and several connectors compatible with the Arduino Uno R3 board. In addition, this expansion board also contains three ST environmental sensors: LSM303AGR accelerometer and magnetometer, HTS221 relative humidity and temperature sensor and LPS22HB pressure sensor. Both the LoRaWAN Discovery Board and the NUCLEO board come with LoRaWAN Class A certified I-CUBE-LRWAN embedded software, enabling designers to set up complete LoRaWAN nodes.
For more information on the STM32 LoRaWAN Discovery Board, please visit http://. To learn more about the expansion boards that are compatible with I?NUCLEO-LRWAN1 STM32 LoRa Arduino, please visit http://.
Residual Current Circuit Breaker
RCCB named Residual Current Circuit Breaker. When there is human electricity shock or if the leakage current of the line exceeds the prescribed value, Residual current circuit breaker/RCCB(without over-current protection) will cut off the power rapidly to protect human safety and prevent the accident due to the current leakage. The rccb switch which made from Korlen electric can be used as infrequent changeover of the line in normal situation.
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