fix: updating central device code

Author: Esquirio

content/hardware/03.nano/boards/nano-rp2040-connect/tutorials/rp2040-ble-device-to-device/rp2040-ble-device-to-device.md

@@ -10,8 +10,6 @@ tags:
   - LED
 author: 'Karl Söderby'
 libraries: 
-  - name: Arduino LSM6DS3 
-    url: https://www.arduino.cc/en/Reference/ArduinoLSM6DS3
   - name: ArduinoBLE
     url: https://www.arduino.cc/en/Reference/ArduinoBLE
 hardware:
@@ -29,7 +27,7 @@ software:
 
 In this tutorial, we will learn how to turn on the blue pixel onboard the Arduino® Nano RP2040 Connect board, from another board. For this, we will need two BLE compatible boards, such as the Nano RP2040 Connect board, where we will use the [ArduinoBLE](https://www.arduino.cc/en/Reference/ArduinoLSM6DS3) library to make the connection. 
 
->**Note:** if you need help setting up your environment to use your Arduino Nano RP2040 board, please refer to [this installation guide](/software/ide-v1/installing-mbed-os-nano-boards).
+>**Note:** if you need help setting up your environment to use your Arduino Nano RP2040 board, please refer to [this installation guide](https://docs.arduino.cc/software/ide-v1/tutorials/getting-started/cores/arduino-mbed_nano).
 
 ## Goals
 
@@ -156,13 +154,13 @@ Upload the code below to the central device.
 #include <ArduinoBLE.h>
 
 void setup() {
-  pinMode(LEDB, OUTPUT);
+  pinMode(LED_BUILTIN, OUTPUT);
   Serial.begin(9600);
   while (!Serial);
   // initialize the BLE hardware
   BLE.begin();
   Serial.println("BLE Central - LED control");
-  // start scanning for LED BLE peripherals
+  // start scanning for Button Device BLE peripherals
   BLE.scanForUuid("19b10000-e8f2-537e-4f6c-d104768a1214");
 }
 void loop() {
@@ -177,9 +175,9 @@ void loop() {
     Serial.print("' ");
     Serial.print(peripheral.advertisedServiceUuid());
     Serial.println();
-    if (peripheral.localName().indexOf("LED") < 0) {
-      Serial.println("No 'LED' in name");
-      return;  // If the name doeshn't have "LED" in it then ignore it
+    if (peripheral.localName().indexOf("Button Device") < 0) {
+      Serial.println("No 'Button Device' in name");
+      return;  // If the name doesn't have "Button Device" in it then ignore it
     }
     // stop scanning
     BLE.stopScan();
@@ -221,10 +219,10 @@ void controlLed(BLEDevice peripheral) {
       //Serial.println(LEDCharacteristic.readValue(value));
       if (value == 0x01) {
         Serial.println("ON");
-        digitalWrite(LEDB, HIGH);
+        digitalWrite(LED_BUILTIN, HIGH);
       }
       else if (value == 0x00) {
-        digitalWrite(LEDB, LOW);
+        digitalWrite(LED_BUILTIN, LOW);
         Serial.println("OFF");
       }
     }