AN4395 Datasheet, PDF (1/24 Pages) STMicroelectronics – Autonomous wireless multi-sensor node powered by PV cells

AN4395
Application note
Autonomous wireless multi-sensor node powered by PV cells and
based on SPV1050 (SPIDEr™)
Domenico Ragonese
Introduction
The STEVAL-IDS002V1 is a complete and fully configurable reference design of a wireless
sensor node powered by the energy harvested from a photovoltaic module soldered on the
top. It is composed by a fully integrated transmitter board which contains a temperature
sensor, an air pressure sensor and a 3-axis accelerometer MEMS sensor powered by the
SPV1050 device. Moreover a microcontroller and an RF Sub-Giga transmitter, all by ST, are
mounted on the board.
The system has a receiver companion powered through a USB cable by the PC. For further
details on the SPV1050 device, please refer to the related datasheet.
The reference design kit is supported by a software user-friendly GUI able to show PV
module and battery electrical characteristics, conversion efficiency, MPPT accuracy and
sensors readings.
The transmitter module is based on an STM32L151 low power microcontroller which
controls sensors configuration and data communication. A digital temperature sensor
(STTS751), a pressure sensor (LPS331AP) and a 3-axis accelerometer (LIS3DH) are
connected to the microcontroller through the I²C bus.
Figure 1. STEVAL-IDS002V1 reference design kit (SPIDEr™)
May 2014
DocID025513 Rev 1
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