diff --git a/README.md b/README.md
index f763cbf..03ce3bd 100644
--- a/README.md
+++ b/README.md
@@ -9,9 +9,9 @@ This library provides an implementation of [OPC UA](https://en.wikipedia.org/wik
 Furthermore, the library supports automatic detection, configuration and exposure of up to two Arduino Opta Expansion Boards (i.e. Digital Expansion w/ mechanical relays [`D1608E`](https://store.arduino.cc/products/opta-ext-d1608e), Digital Expansion w/ solid-state relays [`D1608S`](https://store.arduino.cc/products/opta-ext-d1608e), Analog Expansion [`A0602`](https://store.arduino.cc/products/opta-ext-a0602)) via OPC UA.
 
 ### How-to-OPC UA
-* Compile and upload [`examples/opcua_server`](examples/opcua_server/opcua_server.ino)
+* Compile and upload [`examples/opta_opcua_server`](examples/opta_opcua_server/opta_opcua_server.ino)
 ```bash
-arduino-cli compile --fqbn arduino:mbed_opta:opta -v examples/opcua_server -u -p /dev/ttyACM0
+arduino-cli compile --fqbn arduino:mbed_opta:opta -v examples/opta_opcua_server -u -p /dev/ttyACM0
 ```
 * Connect Arduino Opta Ethernet port with a [DHCP](https://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol)-enabled router, switch, etc.
 * Open a serial monitor
@@ -41,7 +41,8 @@ python3 -m pip install --upgrade pyopenssl
 python3 -m pip install --upgrade .
 ```
 
-### How-to-enable detailed heap/stack memory debugging information
+### Developer section
+#### How-to-enable detailed heap/stack memory debugging information
 * Edit [`variants/OPTA/conf/mbed_app.json`](https://github.com/arduino/ArduinoCore-mbed/blob/main/variants/OPTA/conf/mbed_app.json)
 ```diff
 "target.macros_add": [
diff --git a/examples/opcua_server/README.md b/examples/opcua_server/README.md
deleted file mode 100644
index 003e523..0000000
--- a/examples/opcua_server/README.md
+++ /dev/null
@@ -1,7 +0,0 @@
-:floppy_disk: `opcua_server.ino`
-================================
-
-### How-to-build Modbus MD02 demo
-```bash
-arduino-cli compile --fqbn arduino:mbed_opta:opta examples/opcua_server -v --build-property compiler.cpp.extra_flags="-DUSE_MODBUS_SENSOR_MD02=1"
-```
diff --git a/examples/opcua_server/opcua_server.ino b/examples/opta_opcua_server/opta_opcua_server.ino
similarity index 97%
rename from examples/opcua_server/opcua_server.ino
rename to examples/opta_opcua_server/opta_opcua_server.ino
index 0c11e2f..451a466 100644
--- a/examples/opcua_server/opcua_server.ino
+++ b/examples/opta_opcua_server/opta_opcua_server.ino
@@ -1,3 +1,14 @@
+/*
+ * By compiling and uploading this sketch to your Arduino Opta you obtain turn your
+ * Arduino Opta into a networked OPC UA capable device.
+ *
+ * How-to-build/upload:
+ *   arduino-cli compile --fqbn arduino:mbed_opta:opta examples/opta_opcua_server -v -u -p /dev/ttyACM0
+ *
+ * How-to-build/upload RS485 Modbus Demo integrated with this sketch:
+ *   arduino-cli compile --fqbn arduino:mbed_opta:opta examples/opta_opcua_server -v --build-property compiler.cpp.extra_flags="-DUSE_MODBUS_SENSOR_MD02=1" -u -p /dev/ttyACM0
+ */
+
 /**************************************************************************************
  * INCLUDE
  **************************************************************************************/