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Hello, I would like measure the signal strength in the absence of the incoming packets (ambient Noise and Source interference). While Reading from various post i understand that it is sufficient the sampling the RSSI register: is it correct ? If is correct why does http://www.moteiv.com/community/Reading_RSSI_values_from_Tmote_Sky reccomend this ? When a Tmote Sky receives a packet, it stores the signal strength of the incoming packet in the TOS_Msg structure. It is also possible to read the signal strength in the absence of the incoming packets. Such functionality is useful for estimating the noise floor of a particular channel and locating sources of interference such as 802.11 networks and microwave ovens. The default radio stack does not include such functionality; this document includes instructions for how to incorporate the needed functionality into the radio stack. You will need to modify two files CC2420ControlM.nc and CC2420RadioC.nc. thank you very much Paolo Latella website: www.halos.it |
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