LORA and LORAWAN are a fairly new phenomenon in "Internet Of Things" It was only invented in 2010 and was derived from the Second World War Submarine communication. It is called "chirp spectrum" technology and it entails to listen for a message before sending a message. "LORA" is a abbreviation for Long Range communication.Embedded systems and the IoT, The term IoT (Internet of Things) is recent but refers to an old usage called Machine-to-Machine. Machine-to-Machine (M2M) is a set of wired or wireless network technologies that allow the automatic exchange of information between systems without human intervention. The IoT is simply a wider vision of M2M, where the devices don't only come from the industrial world, but also from common public usage. The IoT market continues to grow significantly around the world. This rapid evolution encourages new players to propose new technologies at each stage: the development of hardware devices, connectivity coverage, and cloud services (i.e., data storage of visualization platforms). The IoT is often presented as the new industrial revolution, and marketing often promises that all use cases are "smart": smart building, smart city, smart healthcare, etc However, making things “smart” is not always easy and many protocols exist. We will help you understand one of the main protocols in the IoT world: LoRaWAN®.