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Rssi and Lqi

Rssi and Lqi. HSCC 2013. Introduction. Rssi ：信號強度 Lqi ：信號連接 品質 若 值越小則 loss rate 越高 兩 個值之間是有相關的，可用公式換算 在 CC2420 封包傳送時，順帶就會有這兩個信號資訊 我們 只需要將其讀取出來. 修改 packet. 修改 Configuration.nc. 修改 main.nc. 新增 CC2420Packet Packet 會有 Rssi 資訊. 修改 main.nc.

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Rssi and Lqi

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  1. Rssi and Lqi HSCC 2013

  2. Introduction Rssi：信號強度 Lqi：信號連接品質 若值越小則 loss rate 越高 兩個值之間是有相關的，可用公式換算 在CC2420封包傳送時，順帶就會有這兩個信號資訊 我們只需要將其讀取出來

  3. 修改 packet

  4. 修改 Configuration.nc

  5. 修改main.nc 新增 CC2420Packet Packet會有Rssi資訊

  6. 修改main.nc CC2420Packet.setPower為設定Radio的傳輸Power 如此已經送出有Rssi資訊、設定好power的封包

  7. 修改BaseStation 1.複製範例程式 BaseStation並重新命名 （Ex：BaseStationRssi）

  8. 修改BaseStation

  9. 修改BaseStation

  10. 使用java檔接收RssiLqi Demo.java RssiSend.java

  11. 修改RssiSend.java MESSAGE_SIZE 為payload的byte數 (應為5) AM_TYPE為 .h檔所定義的message型態 (應為6) 重新complier java檔 (javac RssiSend.java) 可以自行修改java檔決定要輸出什麼

  12. Homework 1~3個人一組作測試 測Power為 1,8,15,22,31 時的最大傳輸距離和開始會有明顯封包loss現象的距離 測試高度對傳輸距離的影響 PS: BaseStation和BlinkToRadio程式內有counter請去掉

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