Updated README

Author: paulorb

README.md

@@ -8,3 +8,33 @@ Please see the [project website](https://paulorb.github.io/modbus-simulator-cli/
 
 > :warning: **This is a work in progress**:
 
+## Features
+* High performance TCP Server
+* 100% Kotlin code - JVM (Multiplatform)
+* Ability to associate memory registers with symbols (variable names)
+* Ability to create custom simulation which can during runtime set, clear variables, execute math operations over registers, deal with specific timing requirements
+* Available as CLI tool or as docker image
+
+## Registers
+The table below shows the supported registers and which datatype
+and simulation operation can be performed for each register.
+
+| Register               | Datatype       | Operations |
+|------------------------|----------------|------------|
+| Coils (0x)             | BOOL           | Set        |
+| Input register (1x)    | BOOL           | Set        |
+| Discrete Input (3x)    | INT16          | Set, Add   |
+| Holding Registers (4x) | INT16, FLOAT32 | Set, Add   |
+
+## Quick Start
+1. Compile with gradle and generate fat Jar
+
+```shell
+./gradlew shadowJar
+```
+ 2. Run it with "-sr" argument which is the most basic simulation, consisting in generating random values each time a read operation is performed.
+
+```shell
+java -jar build/libs/modbus-simulator-cli-1.0-SNAPSHOT-all.jar -sr
+```
+For customization options check [full documentation](https://paulorb.github.io/modbus-simulator-cli/)