Building a CLI

In this section, we are going to parse the input from a user and compare the input with predefined commands. These commands will then be executed by the microcontroller. For this project, we are going to use the same hardware setup that we used in the previous one.

We will start by creating a new folder named hd44780-cli inside the Chapter06 folder. Then, we must create a main.go file with an empty main function inside it. The project's structure should now look similar to the following:

Figure 6.10 – Project structure

Now that the project structure has been set up, we can implement the logic. To do so, follow these steps:

1. Above the main function, start by defining some constants. commandConstant represents the command that needs to be sent to the microcontroller. We will use these constants ahead in this code and compare them with the user input to determine whether a CLI command has been entered:

   const (
     ...