updated readme

README.md

@@ -1,5 +1,30 @@
 # hassio-solvis-modbus
+[![hacs_badge](https://img.shields.io/badge/HACS-Custom-41BDF5.svg)](https://github.com/hacs/integration)
+[![Validate with hassfest](https://github.com/Patrick762/hassio-solvis-modbus/actions/workflows/hassfest_validation.yml/badge.svg)](https://github.com/Patrick762/hassio-solvis-modbus/actions/workflows/hassfest_validation.yml)
+[![HACS Action](https://github.com/Patrick762/hassio-solvis-modbus/actions/workflows/HACS.yml/badge.svg)](https://github.com/Patrick762/hassio-solvis-modbus/actions/workflows/HACS.yml)
+
 Home Assistant Integration for Solvis SC3
 
 ## Disclaimer
 This integration is provided without any warranty or support by Solvis. I do not take responsibility for any problems it may cause in all cases. Use it at your own risk.
+
+## Installation
+To install this integration, you first need [HACS](https://hacs.xyz/) installed.
+After the installation, you need to add the repository URL in HACS as custom repository: https://github.com/Patrick762/hassio-solvis-modbus
+You can then search for "Solvis Modbus" in the HACS integrations.
+
+## Adding devices
+You can add devices via the home assistant integrations page by using the device ip address and setting a name. Sensors will then be added automatically.
+
+### Available sensors
+
+- Gas burner power
+- Outdoor air temperature
+- Outdoor air temperature on your roof (if using solar)
+- Cold water temperature
+- Flow water temperature
+- Domestic water temperature
+- Solar fluid temperature (if using solar)
+- Solar heat exchanger input and output temperature (if using solar)
+- Temperatures of the different layers in the water tank
+- Flow rate of solar fluid and domestic water