Firmware update sub section added

Author: mcmchris

content/hardware/07.opta/opta-family/opta/tutorials/01.user-manual/assets/fw-update-serial-2.png

@@ -1747,6 +1747,26 @@ Install all the **library dependencies** suggested by clicking the **Install All
 
 Once installed, you will have access to a variety of sketch examples showcasing the expansions capabilities and how to use them.
 
+#### Update Expansion Firmware
+
+With the library properly installed, we will update the expansion firmware to ensure proper functioning and seamless detection.
+
+In the Arduino IDE, navigate to **File > Examples > Arduino_Opta_Blueprint > updateExpansionFw**.
+
+[Firmware update example](assets/fw-update.png)
+
+Upload the program to the Opta™ controller and open the Arduino IDE Serial Monitor.
+
+[Firmware update process](assets/fw-update-serial.png)
+
+If your expansion is updatable, in the Serial Monitor you will see its current firmware version and the new one to which it will be updated.
+
+Type `Y` in the Serial Monitor to confirm the update and wait for it to be completed.
+
+[Firmware update running](assets/fw-update-serial-2.png)
+
+Finally, your Opta™ expansion will be updated with the latest firmware version.
+
 ### Programmable Inputs
 
 The Opta™ Expansions have **16 analog/digital programmable inputs** accessible through terminals `I1` to `I16`.