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 1. [Unit 1 - Introduction to Embedded Systems](https://git.kska.io/sppu-te-comp-content/InternetOfThingsAndEmbeddedSystems/src/branch/main/Notes/Unit%201%20-%20Introduction%20to%20Embedded%20Systems)
 2. [Unit 2 - Internet of Things-Concepts](https://git.kska.io/sppu-te-comp-content/InternetOfThingsAndEmbeddedSystems/src/branch/main/Notes/Unit%202%20-%20Internet%20of%20Things-Concepts)
+4. [Unit 4 - IoT Protocols](https://git.kska.io/sppu-te-comp-content/InternetOfThingsAndEmbeddedSystems/src/branch/main/Notes/Unit%204%20-%20IoT%20Protocols)
 
 ## Practical
 > These folders contain **handout**, **write-up** and **other content**.
@@ -14,6 +15,7 @@
 
 1. [Assignment-1](https://git.kska.io/sppu-te-comp-content/InternetOfThingsAndEmbeddedSystems/src/branch/main/Practical/Assignment-1/)
 2. [Assignment-2](https://git.kska.io/sppu-te-comp-content/InternetOfThingsAndEmbeddedSystems/src/branch/main/Practical/Assignment-2/)
+3. [Assignment-3](https://git.kska.io/sppu-te-comp-content/InternetOfThingsAndEmbeddedSystems/src/branch/main/Practical/Assignment-3/)
 
 ## Question Papers
 - [IN-SEM](https://git.kska.io/sppu-te-comp-content/InternetOfThingsAndEmbeddedSystems/src/branch/main/Question%20Papers/IN-SEM)