diff --git a/sensor-node/modules/ROOT/pages/index.adoc b/sensor-node/modules/ROOT/pages/index.adoc
index 1d3f94c..5e8cfee 100644
--- a/sensor-node/modules/ROOT/pages/index.adoc
+++ b/sensor-node/modules/ROOT/pages/index.adoc
@@ -380,6 +380,7 @@ TIP: You can find more information https://git.swarmlab.io:3000/zeus/iot-swarm-e
 
 == How to communicate Arduino2Raspberry
 
+Blinking example (*)
 
 === Arduino code - Blinking built-in diode example
 
@@ -453,7 +454,7 @@ void loop() {
 
 ----
 
-=== Raspberry Pi C language - Blinking built-in diode example
+=== Raspberry Pi C language
 
 [source,c]
 ----
@@ -614,7 +615,7 @@ int main(int argc, char **argv)
 
 ----
 
-=== Raspberry Pi Python - Blinking built-in diode example
+=== Raspberry Pi Python
 
 
 [source,c]
@@ -683,6 +684,7 @@ while True:
 
 ----
 
+(*) Original: https://rimstar.org/science_electronics_projects/raspberry_pi_to_arduino_serial_usb_communication.htm
 
 == Video