Introduction

In this tutorial you will learn how to control the relays on a relay shield with a Nextion HMI without using the Nextion Library. It is really simple unlike the Nextion library that takes up a lot of memory space and can be cumbersome to manage. So follow along and enjoy making this project and feel free to use the code in your own projects.

Used the HMI to turn on the 2 on board relays.