diff --git a/README.md b/README.md
index 65a0ee0..85c6d4c 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,11 @@
 # OpenCanary
 
+## Device preparation
+
+1. Install OS [Armbian 11 Bullseye](https://download.csec.ba/tinkerboard/Armbian_11.img.xz)
+
+2. Update and upgrade
+```bash
+sudo apt update && sudo apt upgrade -y
+```
+