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| It can quickly become a cacophony, even in the hertzian area. Broadcasting is not an efficient way to communicates. | | It can quickly become a cacophony, even in the hertzian area. Broadcasting is not an efficient way to communicates. |
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− | [[Fichier:COMMON-CANSAT-RFM69HCW-broadcast.png|512px]] | + | [[Fichier:COMMON-CANSAT-RFM69HCW-broadcast.png|480px]] |
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− | {{underline|When to use boardcasting:}} | + | {{underline|When to use broadcasting?}} |
− | * | + | * When the message must be send to anyone (like a "Panic" message). |
| + | * When there are max 2 persons/devices involved in the exchange |
| + | |
| + | === What is a Mesh network? === |
| + | Considering everybody using the same frequency and same encryption key are all on the same place: |
| + | * Mesh network is like everybody is using a mobile phone to contact the remittee/recipient. |
| + | * Everybody has a unique phone number (a NODE_ID) used to contact him. |
| + | * The exchange/dialog/conversation is strictly private. |
| + | * Several conversations can occurs at the same time without disturbing each other. |
| + | * Anyone is still able to received a broadcast message. |
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| + | {{ambox|text=A mesh network is more than that! It can also use an intermediate node to contact a more distant contact.}} |
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| + | [[Fichier:COMMON-CANSAT-RFM69HCW-mesh.png|480px]] |
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| + | {{underline|When to use mesh network?}} |
| + | * When each person/device in uniquely identified (this is a requirement, identification known as NODE_ID). |
| + | * When there is more than two persons/devices sharing the network/area. |
| + | * When the information must be privately exchange between 2 persons/devices |
| + | * When acknowledgment are suited in the communication.<small><br />Indeed, we have to know the number of each other (NODE_ID) to callback for acknowledgement).</small> |
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| == Power Pins == | | == Power Pins == |