fixing typos and punctuation errors

1-getting-started/lessons/4-connect-internet/wio-terminal-mqtt.md

@@ -6,11 +6,11 @@ In this part of the lesson, you will connect your Wio Terminal to an MQTT broker
 
 ## Install the WiFi and MQTT Arduino libraries
 
-To communicate with the MQTT broker, you need to install some Arduino libraries to use the WiFi chip in the Wio Terminal, and communicate with MQTT. When developing for Arduino devices, you can use a wide range of libraries that contain open-source code and implement a huge range of capabilities. Seeed publish libraries for the Wio Terminal that allow it to communicate over WiFi. Other developers have published libraries to communicate with MQTT brokers, and you will be using these with your device.
+To communicate with the MQTT broker, you need to install some Arduino libraries to use the WiFi chip in the Wio Terminal, and communicate with MQTT. When developing for Arduino devices, you can use a wide range of libraries that contain open-source code and implement a huge range of capabilities. Seeed publishes libraries for the Wio Terminal that allows it to communicate over WiFi. Other developers have published libraries to communicate with MQTT brokers, and you will be using these with your device.
 
-These libraries are provided as source code that can be imported automatically into PlatformIO, and compiled for your device. This way Arduino libraries will work on any device that supports the Arduino framework, assuming that the device has any specific hardware needed by that library. Some libraries, such as the Seeed WiFi libraries, are specific to certain hardware.
+These libraries are provided as source code that can be imported automatically into PlatformIO and compiled for your device. This way Arduino libraries will work on any device that supports the Arduino framework, assuming that the device has any specific hardware needed by that library. Some libraries, such as the Seeed WiFi libraries, are specific to certain hardware.
 
-Libraries can be installed globally and compiled in if needed, or into a specific project. For this assignment, the libraries will be installed into the project.
+Libraries can be installed globally and compiled if needed, or into a specific project. For this assignment, the libraries will be installed into the project.
 
 ✅ You can learn more about library management and how to find and install libraries in the [PlatformIO library documentation](https://docs.platformio.org/en/latest/librarymanager/index.html).
 
@@ -33,7 +33,7 @@ Install the Arduino libraries.
 
     This imports the Seeed WiFi libraries. The `@ <number>` syntax refers to a specific version number of the library.
 
-    > 💁 You can remove the `@ <number>` to always use the latest version of the libraries, but there's no guarantees the later versions will work with the code below. The code here has been tested with this version of the libraries.
+    > 💁 You can remove the `@ <number>` to always use the latest version of the libraries, but there are no guarantees the later versions will work with the code below. The code here has been tested with this version of the libraries.
 
     This is all you need to do to add the libraries. Next time PlatformIO builds the project it will download the source code for these libraries and compile it into your project.
 
@@ -142,7 +142,7 @@ Connect to the MQTT broker.
     const string CLIENT_NAME = ID + "nightlight_client";
     ```
 
-    Replace `<ID>` with a unique ID that will be used the name of this device client, and later for the topics that this device publishes and subscribes to. The *test.mosquitto.org* broker is public and used by many people, including other students working through this assignment. Having a unique MQTT client name and topic names ensures your code won't clash with anyone elses. You will also need this ID when you are creating the server code later in this assignment.
+    Replace `<ID>` with a unique ID that will be used the name of this device client, and later for the topics that this device publishes and subscribes to. The *test.mosquitto.org* broker is public and used by many people, including other students working through this assignment. Having a unique MQTT client name and topic names ensures your code won't clash with anyone else's. You will also need this ID when you are creating the server code later in this assignment.
 
     > 💁 You can use a website like [GUIDGen](https://www.guidgen.com) to generate a unique ID.
 
@@ -157,7 +157,7 @@ Connect to the MQTT broker.
     PubSubClient client(wioClient);
     ```
 
-    This code creates a WiFi client using the Wio Terminal WiFI libraries, and uses it to create an MQTT client.
+    This code creates a WiFi client using the Wio Terminal WiFI libraries and uses it to create an MQTT client.
 
 1. Below this code, add the following:
 
@@ -183,7 +183,7 @@ Connect to the MQTT broker.
     }
     ```
 
-    This function tests the connection to the MQTT broker and reconnects if it is not connected. It loops all the time it is not connected, and attempts to connect using the unique client name defined in the config header file.
+    This function tests the connection to the MQTT broker and reconnects if it is not connected. It loops all the time it is not connected and attempts to connect using the unique client name defined in the config header file.
 
     If the connection fails, it retries after 5 seconds.
 
@@ -215,7 +215,7 @@ Connect to the MQTT broker.
 
     This code starts by reconnecting to the MQTT broker. These connections can be broken easily, so it's worth regularly checking and reconnecting if necessary. It then calls the `loop` method on the MQTT client to process any messages that are coming in on the topic subscribed to. This app is single-threaded, so messages cannot be received on a background thread, therefore time on the main thread needs to be allocated to processing any messages that are waiting on the network connection.
 
-    Finally a delay of 2 seconds ensures the light levels are not sent too often and reduces the power consumption of the device.
+    Finally, a delay of 2 seconds ensures the light levels are not sent too often and reduces the power consumption of the device.
 
 1. Upload the code to your Wio Terminal, and use the Serial Monitor to see the device connecting to WiFi and MQTT.