[PC-1451] Max Carrier LoRaWAN tutorial update

content/hardware/04.pro/carriers/portenta-max-carrier/tutorials/connecting-to-ttn/content.md

@@ -106,19 +106,19 @@ Upload the sketch, open the Serial Monitor and wait for the firmware update to f
 
 Device provisioning is a process comparable to bank card numbering. Let's think about bank cards; bank cards numbers start with a six-digit vendor ID number that indicates who allocated and controls the card's security; the remaining digits are unique numbers associated with a specific card. Devices with LoRa® and LoRaWAN® capabilities have a similar system; the **Join Server Unique Identifier** (usually referred to as `JoinEUI`) is a number that manages the security and authorizes the device in a network, while the **Device Unique Identifier** (usually referred to as `DevEUI`) is a unique number that identifies the device. The `JoinEUI` and `DevEUI` are required to send information to TTN; the `JoinEUI` number is provided by the network (in this case TTN) while the `DevEUI` is provided by the manufacturer of the device's LoRa® module. 
 
-The following sketch let's you find out what is the `DevEUI` of your Portenta Max Carrier: 
+The following sketch lets you find out what is the `DevEUI` of your Portenta Max Carrier: 
 
 ```arduino
 #define PORTENTA_CARRIER
 #include <MKRWAN.h>
 
 auto region = US915;
 
-LoRaModem modem(Serial1);
+LoRaModem modem(SerialLoRa);
 
 void setup() {
   Serial.begin(115200);
-  while(!Serial1);
+  while(!Serial);
 
   if(!modem.begin(region)) {
     Serial.println("Failed to start the module...");
@@ -199,7 +199,7 @@ Now, let's start sending information to TTN. The following sketch enables you to
 
 auto region = US915;
 
-LoRaModem modem(Serial1);
+LoRaModem modem(SerialLoRa);
 
 void setup() {
   Serial.begin(115200);