fixed python 3.9 compatibility

README.md

@@ -5,13 +5,9 @@ Stream Deck API Library for Home Assistant Stream Deck Integration
 
 Only compatible with separate [Stream Deck Plugin](https://github.com/Patrick762/streamdeckapi-plugin) or the bundled server.
 
-## Requirements
-- Python 3.10 or higher
-
 ## Dependencies
 - [websockets](https://pypi.org/project/websockets/) 11.0.2
 
-
 ## Server
 This library also contains a server to use the streamdeck with Linux or without the official Stream Deck Software.
 
@@ -21,3 +17,24 @@ For this to work, the following software is required:
 - cairo [Installation instructions for Windows](https://stackoverflow.com/a/73913080)
 
 The event `doubleTap` is not working with this server software.
+
+### Installation on Linux / Raspberry Pi
+
+Install requirements:
+`sudo apt install -y libudev-dev libusb-1.0-0-dev libhidapi-libusb0 libjpeg-dev zlib1g-dev libopenjp2-7 libtiff5`
+
+Allow all users non-root access to Stream Deck Devices:
+```bash
+sudo tee /etc/udev/rules.d/10-streamdeck.rules << EOF
+SUBSYSTEMS=="usb", ATTRS{idVendor}=="0fd9", GROUP="users", TAG+="uaccess"
+EOF
+```
+
+Reload access rules:
+`sudo udevadm control --reload-rules`
+
+Install the package:
+`pip install streamdeckapi`
+
+Start the server:
+`streamdeckapi-server`