Adding Lora firmware update instructions

content/tutorials/portenta-h7/vs-ard-ttn/content.md

@@ -27,6 +27,22 @@ This tutorial explains how to connect your Portenta H7 to The Things Network (TT
 - USB C cable (either USB A to USB C or USB C to USB C)
 - An [account](https://account.thethingsnetwork.org/users/login) with The Things Network
 
+### Updating the LoRa® Module Firmware
+To be able to use the LoRa® functionality, we need to first update the firmware on the LoRa® modem. This can be done through Arduino IDE by running a sketch included in the examples from the MKRWAN library.
+
+1. Connect the Portenta H7 and the Portenta Vision Shield to your computer and open the Arduino IDE. 
+2. Install/update the **MKRWAN** library from Arduino IDE menu  **Tools > Manage Libraries**. Type "MKRWAN" to find the library and click 'Install' or 'Update' if necessary. This library provides all the APIs to communicate with LoRa® and LoRaWAN® networks.
+3. Open the **MKRWANFWUpdate_standalone** sketch from the Arduino IDE  menu: **File > Examples > MKRWAN**.
+
+4. Upload the sketch.
+
+
+![Finding the sketch](assets/vs_ard_ttn_standalone.png)
+
+5. Open the serial monitor and wait for the update to be confirmed.
+
+![Serial Monitor](assets/vs_ard_ttn_serial.png)
+
 ## Connecting to the TTN
 
 The Portenta Vision Shield - LoRa® can be connected to the TTN and can transmit data to other devices connected to this network through a secure channel. This channel is nothing but an applicaiton on the TTN network dedicated for your board. In this tutorial, you will be guided through a step-by-step process of setting up your Portenta board and the Vision Shield LoRa® to communicate with a TTN application. As stated before, to be able to follow this guide, to be under coverage of one of the TTN gateways. You can check for [the coverage](https://www.thethingsnetwork.org/map) now if you have not done so yet.
@@ -156,4 +172,4 @@ If we are within good range of a gateway, we should also try to move our device
 
 **Authors:** Lenard George, Ignacio Herrera  
 **Reviewed by:** Jose Garcia, Linnea Åkerberg [2021-02-02]  
-**Last revision:** Sebastian Romero [2021-02-05]
+**Last revision:** Sebastian Romero [2021-02-05]