Modified README

First commit of README file.

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README.md

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+
+# Integrates your SWS 12500 weather station seamlessly into Home Assistant
+
+This integration will listen for data from your station and passes them to respective sensors. It also provides the ability to push data to Windy API.
+
+*This custom component replaces [old integration via Node-RED and proxy server](https://github.com/schizza/WeatherStation-SWS12500).*
+
+## Requirements
+
+- [Sencor SWS 12500 Weather Station](https://www.sencor.cz/profesionalni-meteorologicka-stanice/sws-12500).
+- Configure station to send data directly to Home Assistant.
+- If you want to push data to Windy, you have to create an account at [Windy](https://stations.windy.com).
+
+## Installation
+
+### Manual installation
+
+For manual installation you must have an access to your Home Assistant's  `/config` folder.
+
+- Clone this repository or download [latest release here](https://github.com/schizza/SWS-12500-custom-component/releases/latest).  
+  
+- Copy the `custom_components/sws12500-custom-component` folder to your `config/custom_components` folder in Home Assistant.
+- Restart Home Assistant.
+- Now go to `Integrations` and add new integration `SWS 12500`
+
+## Configure your station in AP mode
+
+1. Hold the Wi-Fi button on the back of the station for 6 seconds until the AP will flash on the display.
+2. Select your station from available APs on your computer.
+3. Connect to the station's setup page: `http://192.168.1.1` from your browser.
+4. In the third URL section fill in the address to your local Home Assistant installation.
+5. Create new `ID` and `KEY`. You can use [online tool](https://www.allkeysgenerator.com/Random/Security-Encryption-Key-Generator.aspx) to generate random keys. *(you will need them to configure integation to Home Assistatnt)*
+6. Save your configuration.
+![station_setup](README/station_hint.png)
+
+Once integration is added to Home Assistant, configuration dialog will ask you for `API_ID` and `API_KEY` as you set them in your station:
+
+```plain
+API_ID: ID in station's config
+API_KEY: PASSWORD in station's config
+```
+
+![config dialog](README/cfg_dialog.png)
+
+If you chanage `API ID` or `API KEY` in the station, you have to reconfigure integration to accept data from your station.
+
+- In `Settings` -> `Devices & services` find SWS12500 and click `Configure`.
+- In dialog box choose `Basic - Configure credentials`
+
+![reconfigure dialog](README/reconfigure.png)
+
+As soon as the integration is added into Home Assistant it will listen for incoming data from the station and starts to fill sensors as soon as data will first arrive.
+
+## Resending data to Windy API
+
+- First of all you need to create account at [Windy stations](https://stations.windy.com).
+- Once you have an account created, copy your Windy API Key.
+![windy api key](README/windy_key.png)
+
+- In `Settings` -> `Devices & services` find SWS12500 and click `Configure`.
+- In dialog box choose `Windy configuration`.
+![config dialog](README/cfg.png)
+
+- Fill in `Key` you were provided at `Windy stations`.
+- Tick `Enable` checkbox.
+![enable windy](README/windy_cfg.png)
+
+- You are done.