Add library links

content/hardware/03.nano/boards/nano-33-ble-sense-rev2/essentials.md

@@ -4,6 +4,7 @@ productsLibrariesMap:
   - arduino_bmi270_bmm150
   - arduino_hs300x
   - arduino_apds9960
+  - arduino_lps22hb
 ---
 
 <EssentialsColumn title="Guides">
@@ -43,4 +44,5 @@ The PDM library allows you to use PDM (Pulse-density modulation) microphones, li
   <EssentialElement title="Language References" type="resource" link="https://www.arduino.cc/reference/en/">
   Arduino programming language can be divided in three main parts: functions, values (variables and constants), and structure.
   </EssentialElement>
-</EssentialsColumn>
+
+</EssentialsColumn>

content/hardware/03.nano/boards/nano-33-ble-sense-rev2/tutorials/humidity-and-temperature-sensor/content.md

@@ -25,7 +25,7 @@ In this tutorial we will use an **Arduino Nano 33 BLE Sense Rev2** board to meas
 ## Goals
 The goals of this project are:
 - Learn how to output raw sensor data from the Arduino Nano 33 BLE Sense Rev2.
-- Use the HS300x library.
+- Use the [HS300x library](https://docs.arduino.cc/libraries/arduino_hs300x/).
 - Print temperature and humidity values in the Serial Monitor when they are within a certain range. 
 - Create your own temperature and humidity monitor.
 

content/hardware/03.nano/boards/nano-33-ble-sense-rev2/tutorials/imu-accelerometer/content.md

@@ -25,7 +25,7 @@ This tutorial will focus on the IMU system with the **BMI270 and BMM150** module
 
 The goals of this project are:
 - Understand how the IMU system on the Arduino Nano 33 BLE Sense Rev2 works.
-- Use the BMI270_BMM150 library.
+- Use the [BMI270_BMM150 library](https://docs.arduino.cc/libraries/arduino_bmi270_bmm150/).
 - Read the raw data of the accelerometer sensor.
 - Convert the raw data into board positions.
 - Print out live data through the Serial Monitor.

content/hardware/03.nano/boards/nano-33-ble-sense-rev2/tutorials/imu-gyroscope/content.md

@@ -23,7 +23,7 @@ This tutorial will focus on the 3-axis gyroscope sensor of the IMU system on the
 
 The goals of this project are:
 - Understand how the IMU system on the Arduino Nano 33 BLE Sense Rev2 works.
-- Use the BMI270_BMM150 library.
+- Use the [BMI270_BMM150 library](https://docs.arduino.cc/libraries/arduino_bmi270_bmm150/).
 - Read data from the gyroscope's sensor.
 - Convert the raw data into direction of force.
 - Print out live data through the Serial Monitor.

content/hardware/03.nano/boards/nano-33-ble-sense-rev2/tutorials/imu-magnetometer/content.md

@@ -26,7 +26,7 @@ This tutorial will focus on the 3-axis magnetometer sensor of the IMU system on
 
 The goals of this project are to:
 - Understand how the IMU system on the Arduino Nano 33 BLE Sense Rev2 works.
-- Use the BMI270_BMM150 library.
+- Use the [BMI270_BMM150 library](https://docs.arduino.cc/libraries/arduino_bmi270_bmm150/).
 - Measure the value of a magnetometer sensor.
 - Create visual feedback according to magnetic disturbance in the environment.
 - Convert the sensor's values in LED light intensity.

content/hardware/03.nano/boards/nano-33-ble-sense-rev2/tutorials/microphone-sensor/microphone_sensor.md

@@ -30,7 +30,7 @@ In this tutorial we will use an **Arduino Nano 33 BLE Sense Rev2** board to meas
 The goals of this project are:
 
 - Learn how to output raw sensor data from the Arduino Nano 33 BLE Sense Rev2.
-- Use the PDM(Pulse-density modulation) library.
+- Use the [PDM(Pulse-density modulation) library](https://docs.arduino.cc/learn/built-in-libraries/pdm/).
 - Print sound values in the Serial Monitor.
 - Create your own RGB sound meter.
 

content/hardware/03.nano/boards/nano-33-ble-sense/tutorials/barometric-sensor/barometric_sensor.md

@@ -25,7 +25,7 @@ A popular application of a barometric sensor, apart from GPS and forecasting sho
 ## Goals
 The goals of this project are:
  - Learn what a LPS22HB sensor is.
- - Use the LPS22HB library.
+ - Use the [LPS22HB library](https://www.arduino.cc/en/Reference/ArduinoLPS22HB).
  - Learn how to output raw sensor data from the Arduino NANO 33 BLE Sense.
  - Learn how to convert the kPa unit to altitude values (meters).
  - Print the data using Serial Monitor.
@@ -182,3 +182,4 @@ Sometimes errors occur, if the code is not working there are some common issues
 ## Conclusion
 In this tutorial we learned what a **LPS22HB** sensor is, how to use the one embedded in the Arduino NANO 33 BLE Sense board and the LPS22HB library, in order to create our own barometer and measure the altitude in meters by retrieving and calculating the atmospheric pressure.
 
+