---
title: "Energy Monitor Shield V2"
url: "https://maker.wiznet.io/lucywong/resellers/Energy-Monitor-Shield-V2/"
markdown_url: "https://maker.wiznet.io/lucywong/resellers/Energy-Monitor-Shield-V2/md"
type: "VAR: Value-Added Reseller Products"
author: "lucywong"
original_author: "lucywong"
published: "2021-02-01"
language: "en"
likes: 0
views: 267
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Energy Monitor Shield V2

> Energy Monitor Shield V2

Original author: lucywong

## Article

## Expansion

Additionally EM Shield v2 can be connected to any device using i2c Grove-compatible connections (sensors, displays, etc.). EM Shield v2 was designed to be fully compatible with?Ethernet Shield (Wiznet 5100 + SD)?- so you can use these two together Schild to create even more advanced device monitoring electricity (logging on SD-card and presenting the data on a web page).

## Interfaces

- A0 - engaged to connect the sensor AC

- A1 - to connect phototransistor

- A4 (SDA), A5 (SCL) - displayed on connector "I2C" (the other two pins in the connector - VCC and GND for sensor supply)

- Interface for connecting an RF-module nRF24L01 +:
  - D11 - MOSI
  - D12 - MISO
  - D13 - SCK
  - D7 - RF_CE
  - D8 - RF_CSN
  - D2 - RF_IRQ

- Interface for MAX485:
  - D0 - RX (switched off switch for programming)
  - D1 - TX (switched off switch for programming)
  - D5 - Reception / Transmission

- A3 - Buttons

---

Source: https://maker.wiznet.io/lucywong/resellers/Energy-Monitor-Shield-V2/