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When we want to use a LoRaWAN end device,
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we must first activate it.
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But what does activation really mean ?
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Actually, it's quite simple.
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Activation means that the end device is ready to send or receive LoRaWAN packet.
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For that, we saw that we need to network session key for authentication, the application session key
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for encryption on the device adress for identification. And these 3 sessions information
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has to be both on the device and the server.
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The question is how do the end device and the server can get these keys?
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That's where the activation mode comes because there are two possible methods.
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One is called ABP for Activation By Personalization.
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It's supposed to be the simplest method, but it has also a lot of disadvantages.
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There's also a second method called OTAA for Over The Air Activation.
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And in that case, the activation procedure is a little bit more complex, but there are many advantages.
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In both cases, the purpose is exactly the same.
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We want to have the same network session key, application session key and the same device address in the end
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device and on the server.
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Now one more thing before diving in the activation process.
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When we register a device on the LoRaWAN server, this device
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must be uniquely identified.
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This identification number is called the devEUI.
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This devEUI is not supposed to be used twice.
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Even if the ABP activation doesn't use it, the networks never will ask for this devEUI for the registration
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because it can be helpful to identify your device on your server. Like any other LoRaWAN information
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you can generate it on the network server.
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But often, the devEUI is written on the box because it's not a secret number.
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So now we're ready to study these two activation methods and in the next video let's start with ABP.