This article presents the design of the hardware and software architecture of a monitoring system for some agroclimatic variables (light radiation and humidity of soil) through a set of technologies based on the Internet of Things (IoT). First, the state of the art is show for identify the more relevant research in the application of the digital agriculture concept. Second, the general architecture of the project is presented, making a description of the hardware and software used in it. Then, the information is broken down into the layers of the architecture, such as: perception layer, network layer and application layer, and the operation of each layer is detailed. Finally, the feasibility information is presented, and some recommendations are presented on future developments and what is expected to be improved in the presented prototype.