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This chapter is about the visualization of the LoRa modulation and the representation of the LoRa
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frame.
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It will be quite short and it's not essential, but we really think that it helps to understand the
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LoRaWAN specification because there are many terms that we often mixed up.
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At the end of this chapter, we would like you to be able to make the difference between the LoRa radio modulation,
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the PHY payload and the frame payload.
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For that we'll make some demonstration to check the LoRa signal before the gateway.
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We'll take the IP packet transmitted by the gateway to the network server.
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And finally, we'll check the message received on the network server and the application server.