March 2013

DocID23586 Rev 1

1/24

UM1569

Application note

STEVAL-IHP004V1: SmartPlugW demonstration board

By Salvo Bonina and Nunzio Dipaola

Introduction

This demonstration board is a smartplug based on the STM32W108CB microcontroller

integrated into the SPZB32W1A2.1 module, the STPM10 energy metering IC, and the

T2035H Triac. The board is a node of an IEEE-802.15.4 network which allows the final user

to monitor and manage the energy consumption of the load connected to the SmartPlugW.

The board has been developed to provide a guideline to build an automation subsystem for

energy management and is designed to fit the dimensions of a standard box for wall

installation and easy integration into the electrical systems of homes or commercial

buildings. The current, power, energy and other information related to the electrical load

connected to the SmartPlugW board are sent to a data concentrator through the wireless

network of a home or building. The board includes the following sections shown in the block

diagram of

Figure 1:

• Energy measurement by the STPM10 IC

• Wireless communication up to 250 kbps by the SPZB32W1A2.1 module

• Data storage by the M24LR64 dual-interface EEPROM

• Power supply by VIPer16

• Load driver with soft-start/stop by T2035H TRIAC and relay

Figure 1. SmartPlugW block diagram

AM15223v1

AM15223v1

12V

TRIAC

SPI

I2C

Energy Measurement

STPM10

Power

Management

DUAL EEPROM

M24LR64

ZigBee Module

IEEE802.15.4

SPZBW

RELAY

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