Hello Wasif, Thanks for your reply.
I want to directly use the data of Hex message. For example, there is a message. 7E 45 00 FF FF 00 01 02 3F 0A 00 1B 16 48 7E I think 00 1B is the RSSI. 0X 1B=27 can I get the received power (dBm) = -91dBm+3*(27-1)=-13 dBm ? Is this right? Thanks again. Regards, Haixia ________________________________ From: wasif masood [[email protected]] Sent: Wednesday, May 23, 2012 11:39 AM To: Li, Haixia-OSU Stillwater Cc: Hamid Rafiei Karkvandi; [email protected] Subject: Re: [Tinyos-help] RSSI with IRIS Dear Li, I guess you can also use MsgReader and specify your RssiMsg file as generated by the MIG tool, or else you can simply lookup for the last 2 bytes of the Hex message. For details about the Hex message please refer to the PC to Mote communication tutorial on tinyos Documentation. BR, Wasif On Wed, May 23, 2012 at 5:19 PM, Li, Haixia-OSU Stillwater <[email protected]<mailto:[email protected]>> wrote: Hello Hamid, Thank you for your reply. I followed the RSSI demo tutorial. However, I cannot use the java program, and I cannot figure out why. So, I directly get the packets from the serial port. Now I have the packets, I want to get the RSSI. How should I change the data in the packet to the RSSI? And is the data given by the RSSI demo java the received power dBm ? Appreciated. Regards, Haixia Li ________________________________ From: Hamid Rafiei Karkvandi [[email protected]<mailto:[email protected]>] Sent: Tuesday, May 22, 2012 4:54 PM To: Li, Haixia-OSU Stillwater Cc: [email protected]<mailto:[email protected]> Subject: Re: [Tinyos-help] RSSI with IRIS Hi, You may follow the steps in the RSSI demo tutorial, it is totally straightforward, RSSI Base Value is given in the datasheet to be -91dBm the lowest that IRIS mote can detect, Regards, Hamid Rafiei Karkvandi On Tue, May 22, 2012 at 3:33 PM, Li, Haixia-OSU Stillwater <[email protected]<mailto:[email protected]>> wrote: Hello all, I want to get RSSI of IRIS. I used RssiBase, but I didn't use the RssiDemo.java. I directly received the packet transmitted by RSSI. For example, a packet is : 7E 45 00 FF FF 00 01 02 3F 0A 00 1B 16 48 7E I think the 00 1B is the RSSI. Can anyone tell me how to change this value to input power? The RF230 datasheet(P52) says PRF=RSSI_BASE_VAL+3*(RSSI-1) , and the RSSI value is represented in the lowest five bits. should I use the equation and only use the lowest five bits of 00 1B? and what is the RSSI_BASE_VAL? Thanks. Haixia _______________________________________________ Tinyos-help mailing list [email protected]<mailto:[email protected]> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help _______________________________________________ Tinyos-help mailing list [email protected]<mailto:[email protected]> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help -- Wasif Masood
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