fix strcpy vs strcat issue

Feather9x_TX_RX_serial/Feather9x_TX_RX_serial.ino

@@ -19,7 +19,7 @@ int incomingByte = 0;
 // Serial imput
 const byte numChars = RH_RF95_MAX_MESSAGE_LEN;
 char receivedChars[numChars];
-char name[30];
+char chatName[30];
 
 void setup() {
   pinMode(LED_BUILTIN, OUTPUT);     
@@ -65,15 +65,15 @@ void setup() {
     // read the incoming byte:
     incomingByte = Serial.read();
     // say what you got:
-    name[ndx] = incomingByte;
+    chatName[ndx] = incomingByte;
     ndx++;
   }
   char send_name[RH_RF95_MAX_MESSAGE_LEN] = "";
-  strcat(send_name, name);
+  strcpy(send_name, chatName);
   strcat(send_name, " has joined the chat!");
 
   Serial.print("Welcome ");
-  Serial.println(name);
+  Serial.println(chatName);
   rf95.send((uint8_t *)send_name, RH_RF95_MAX_MESSAGE_LEN);
 }
 
@@ -95,12 +95,12 @@ void loop() {
 
   if (dataReceived) {
     dataReceived = 0;
-    Serial.print(name);
+    Serial.print(chatName);
     Serial.print(": ");
     Serial.println(receivedChars);
 
     char actual_message[RH_RF95_MAX_MESSAGE_LEN];
-    strcat(actual_message, name);
+    strcpy(actual_message, chatName);
     strcat(actual_message, ": ");
     strcat(actual_message, receivedChars);
 
@@ -122,6 +122,7 @@ void loop() {
       Serial.println((char*)buf);
       // Serial.print("RSSI: ");
       // Serial.println(rf95.lastRssi(), DEC);
+      digitalWrite(LED_BUILTIN, LOW);
     }
   }
 }