Update 'README.md'

README.md

@@ -109,9 +109,47 @@ Enable on boot
 
 ## onlyone - utility  
 
+**Prerequisites**  
+- Git  
+
+      sudo apt install git
+
+### Setup
+
+1. Download git  
+    
         cd /srv  
         git clone https://git.limbosolutions.com/marcio.fernandes/onlyone.git  
 
+1. Copy/download [configuration file](etc/onlyone/config.yaml) to /etc/onlyone
+
+1. Change configuration file squeezelite player name  
+    
+1. Setup as service  
+Copy/download [service file](etc/system/systemd/onlyone.service) to etc/system/systemd
+
+      sudo systemctl enable onlyone.service && sudo systemctl start onlyone.service
+
+### How to use onlyone
+- user must be part of group onlyone (group is created on first service start)
+
+      usermod -a -G onlyone USERNAME
+
+- Start squeezelite  
+
+      echo "squeezelite" > /tmp/onlyone_fifo
+
+- Start bluealsaaplay  
+
+      echo "bluetooth"  > /tmp/onlyone_fifo
+
+- checking onlyone for errors or Information
+
+      sudo systemctl status onlyone
+
+
+
+