Juanbaromance/bleroles fixing

content/hardware/03.nano/boards/nano-33-ble-sense/tutorials/ble-device-to-device/ble-device-to-device.md

@@ -55,13 +55,13 @@ When a Bluetooth® connection is established, one device, the peripheral, will a
 
 A **service** is a group of **capabilities**. For example, a smartwatch can measure your heart rate, track your physical activity through the day and track your sleep patterns. These three capabilities, for example, would exist in a service called **health service**. By grouping capabilities in services, central devices allow peripheral devices to quickly find, select and interact with the desired services they want. Any service has a unique identification code called **UUID**. This code can be 16-bit or 32-bit long for official Bluetooth® specification services while non-official Bluetooth® services (the ones we can develop) are 128-bit long, UUIDs can be created randomly. A **profile** is a group of services. 
 
-Within each service will exist a list of **characteristics**. Each one of these characteristics represents a unique capability of the central device. In the previous example, the health service would have three characteristics (heart rate, physical activity, and sleep pattern). **Once the peripheral device discovers these characteristics, it can write information to, request information from, and subscribe to updates from these characteristics**. Any characteristic, like the services, have a 16 bit long or 128 bit long UUID. 
+Within each service will exist a list of **characteristics**. Each one of these characteristics represents a unique capability of the peripherical device. In the previous example, the health service would have three characteristics (heart rate, physical activity, and sleep pattern). **Once the central device discovers these characteristics, it can write information to, request information from, and subscribe to updates from these characteristics**. Any characteristic, like the services, have a 16 bit long or 128 bit long UUID. 
 
 ![Health service example.](assets/nano_ble_sense_t2_img02.png)
 
 ### Information Exchange in Bluetooth® Low Energy
 
-There are three ways data can be exchanged between two connected devices: **reading**, **writing**, or **notifying**. **Reading** occurs when a peripheral device asks the central device for specific information, think about a smartphone asking a smartwatch for the physical activity information, this is an example of reading. **Writing** occurs when a peripheral device writes specific information in the central device, think about a smartphone changing the password of a smartwatch, this is an example of writing. **Notifying** occurs when a central device offers information to the peripheral device using a notification, think about a smartwatch notifying a smartphone its battery is low and needs to be recharged.  
+There are three ways data can be exchanged between two connected devices: **reading**, **writing**, or **notifying**. **Reading** occurs when a central device asks the peripheral device for specific information, think about a smartphone asking a smartwatch for the physical activity information, this is an example of reading. **Writing** occurs when a central device writes specific information in the peripheral device, think about a smartphone changing the password of a smartwatch, this is an example of writing. **Notifying** occurs when a peripheral device offers information to the central device using a notification, think about a smartwatch notifying a smartphone its battery is low and needs to be recharged.  
 
 Well, that's what we need to know about Bluetooth® Low Energy for now. Bluetooth® specifications are quite extensive but interesting to read and learn about. If you want to know more about Bluetooth® Low Energy, check out [**Getting Started with Bluetooth® Low Energy** by Kevin Townsend, Carles Cufí, Akiba, and Robert Davidson](https://www.oreilly.com/library/view/getting-started-with/9781491900550/).
 
@@ -425,4 +425,4 @@ Sometimes errors occur, if one of the codes is not working there are some common
 
 ## Conclusion
 
-In this tutorial, we have learned how to exchange information between two Arduino boards, the Nano 33 BLE and the Nano 33 BLE Sense, through Bluetooth® Low Energy. We also learned the basics of Bluetooth® Low Energy, how does it works, what are services and characteristics, and how information is exchanged in Bluetooth® Low Energy. Lastly, we turn on different colors of the on-board RGB LED of the Nano 33 BLE board based on the values sent from the Nano 33 BLE Sense, those values were defined using its onboard gesture sensor. 
+In this tutorial, we have learned how to exchange information between two Arduino boards, the Nano 33 BLE and the Nano 33 BLE Sense, through Bluetooth® Low Energy. We also learned the basics of Bluetooth® Low Energy, how does it works, what are services and characteristics, and how information is exchanged in Bluetooth® Low Energy. Lastly, we turn on different colors of the on-board RGB LED of the Nano 33 BLE board based on the values sent from the Nano 33 BLE Sense, those values were defined using its onboard gesture sensor.