diff --git a/STM32CubeIDE/.project b/STM32CubeIDE/.project
index 54177b5..d68803d 100644
--- a/STM32CubeIDE/.project
+++ b/STM32CubeIDE/.project
@@ -32,6 +32,11 @@
 		<nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature>
 	</natures>
 	<linkedResources>
+		<link>
+			<name>Doc/YUNHORN-STS-O7.pdf</name>
+			<type>1</type>
+			<locationURI>PARENT-2-PARENT_LOC/YUNHORN-STS-O7.pdf</locationURI>
+		</link>
 		<link>
 			<name>Doc/readme.txt</name>
 			<type>1</type>
diff --git a/readme.txt b/readme.txt
index 0b7811b..998bc87 100644
--- a/readme.txt
+++ b/readme.txt
@@ -27,7 +27,7 @@
 
 STS_O7 For Occupancy sensors 
 
-change log: 
+	change log: 
 2024-04-10	good so far
 2024-04-13	start again