---
title: "HKRAR-EM02 Serial Port"
url: "https://maker.wiznet.io/eric_g/resellers/hkrar-em02-serial-port/"
markdown_url: "https://maker.wiznet.io/eric_g/resellers/hkrar-em02-serial-port/md"
type: "VAR: Value-Added Reseller Products"
author: "HKRFID"
author_url: "https://www.hk-rfid.com/active-rfid-reader"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "HKRFID"
original_url: "https://www.hk-rfid.com/active-rfid-reader"
published: "2022-10-05"
language: "en"
hardware: ["WIZnet W5500"]
likes: 10
views: 5910
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# HKRAR-EM02 Serial Port

> a series of active RFID readers and transponders, enabled by Nordic Semiconductor, nRF51822 series, a Low Power 2.4GHz trans and recv.

Original author: HKRFID (source: https://www.hk-rfid.com/active-rfid-reader)

## Components

- **WIZnet W5500** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5500))

WIZnet parts: W5500 ([Datasheet](https://docs.wiznet.io/Product/Chip/Ethernet/W5500/datasheet?utm_source=maker&utm_medium=project&utm_campaign=w5500), [product hub](https://maker.wiznet.io/products/w5500/))

## Article

Basic version of EM02 Stationary Reader.

As recevier for wireless ID tags or beacons for PC

**RS232** Commnuication Interface - **Stable performance** with neglectable packet loss

**1-to-1 PC** Connection - **High security level** with limited access to offline database

**RSSI** - Support more **sophisticated applcations** with signal strength data

**Raspberry Pi **Compute Module optional

---

Source: https://maker.wiznet.io/eric_g/resellers/hkrar-em02-serial-port/