Add commands to readme

Author: minisbett

README.md

@@ -19,3 +19,38 @@ which can be found in our GitHub repository [here](https://github.com/minipadkb/
 <div align="center">
 <i>Made with ❤️ by Project Minipad</i>
 </div>
+
+# Usage
+
+This command-line utility can be used by opening the Windows Terminal or command prompt (*not powershell*) in the folder of the minitool.exe executable. Below you can find a list of commands.</br>
+**Note:** 'port' is always referring to the port number, excluding the `COM` prefix. (e.g. `4` instead of `COM4`)
+
+General syntax: `minitool.exe <sub-command> <parameters...>`
+
+Command: `devices`</br>
+Description: Lists all connected minipad devices.</br>
+Example: `minitool.exe devices`
+
+Command: `info <port>`</br>
+Description: Outputs the configuration of the minipad device.</br>
+Example: `minitool.exe info 7`
+
+Command: `boot <port>`</br>
+Description: Sets the minipad device into bootloader mode.</br>
+Example: `minitool.exe boot 4`</br>
+
+Command: `send <port> "<command>"`</br>
+Description: Sends the specified command to the minipad device.</br>
+Example: `minitool.exe send 9 "hkey.rt 1"`</br>
+
+Command: `calibrate <port>`</br>
+Description: Helps you calibrating the minipad by pressing the keys down.</br>
+Example: `minitool.exe calibrate 3`</br>
+
+Command: `visualize <port>`</br>
+Description: Displays a commandline-based visualizer for the Hall Effect keys.</br>
+Example: `minitool.exe visualize 14`</br>
+
+You can also find a list of these commands with `minitool.exe help`.
+
+**A list of commands for the minipad firmware can be found [here](https://github.com/minipadKB/minipad-firmware/tree/master#minipad-serial-protocol-msp-).**