The Grove-RJ45 Adapter is a module which can converter a standard Grove connector to a RJ45 connector. Universal 4-Pin Grove cables can not meet the requirements when Arduino remote connect and control Grove module. Through two RJ45 adapter and a cable , It is able to achieve communication between Arduino and Grove module. This solve the problem that Arduino and Grove are not convenient to connect because of the distance issue.
For all Grove users (especially beginners), we provide you guidance PDF documents. Please download and read through Preface - Getting Started and Introduction to Grove before your using of the product.