Ligne 2 : |
Ligne 2 : |
| | | |
| == Forewords == | | == Forewords == |
| + | The RFM69 module and Packet Radio can do a lot to secure message transmission and message content (with the encryption key). |
| + | |
| + | As for wired network (aka TCP/IP) the packet radio enclose your data into datagram before sending it over the air. This helps the hardware to detect error and possibly recover when colisions occurs. |
| + | |
| + | Obviously, more we are talking on a same frequency, more we will have colision, less the communication will be efficient. |
| + | |
| + | The best solution would be to use a frequency plan where each team receives its own frequency range like showed in the following table. |
| + | |
| + | |
| + | {| class="wikitable" border="1" |
| + | |- |
| + | | align="center" | Team |
| + | | align="center" | Freq (MHz) |
| + | | align="center" | Team name |
| + | |- style="font-size: 90%" |
| + | | align="left" | Team #1 |
| + | | align="left" | 433.1 |
| + | | align="left" | |
| + | |- style="font-size: 90%" |
| + | | align="left" | ww |
| + | | align="left" | xx |
| + | | align="left" | yyyy |
| + | |- style="font-size: 90%" |
| + | | align="left" | ww |
| + | | align="left" | xx |
| + | | align="left" | yyyy |
| + | |} |
| | | |
| {{ENG-CANSAT-TRAILER}} | | {{ENG-CANSAT-TRAILER}} |