diff --git a/README.md b/README.md
index 20fb9a4..b47bf43 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,9 @@ However, the HR50 offers serial communication via a USB port. This project tries
 * Heltec ESP32 board with display
 * a python flask application, which represents the communication via the serial interface in the form of an API
 
+This diagram shows which components are required and how the communicate:
+
+![Diagram](diagram.jpg "Diagram")
 
 This is how the display looks like in action: