Hi, Sorry for the inconvenience due to a lengthy mail. Requesting you to spent 2 minutes on this issue.
I have assembled a telosB board with the help of layout given in http://www.tinyos.net/scoop/special/hardware to continue with my research studies. Let me call this as “test telosb board”. I also have some other working telosb boards which are purchased from a local distributor. The “test telosb” does not work either as transmitter or receiver. Please give me some directions to debug this board. My trials as listed below (I use tinyos 2.1.2 on Ubuntu). *Debugging method**1 * I have programmed one *purchased telosb as **transmitter* and the *“**test telosb board” **as receiver**.* The transmitter is programmed to broadcast periodic AM messages. The receiver is programmed with the standard “Basestation” application. But the receiver is not receiving any data. While debugging, I could find that the “SFD” pin of the cc2420 in the test board is NOT going into active state (high) at all. The nesC program running on the transmitter & the receiver are tested using purchased telosb boards. In this case everything works fine. *Debugging method2:* I have a *transmitter (test telosb board)* and a *receiver **(purchased telosb**)*. Receiver is programmed with “Basesation” application. The transmitter is programmed to broadcast some periodic AM messages. The nesC program running on the transmitter signals the event “AMSend.sendDone” with success. In this case , the “SFD pin ” works as expected (Fig 15 in cc2420 data-sheet). Also I am able to measure a transmission power of approx. 0 dBm around 2.45GHz band using a spectrum analyzer. But the receiver does not receive any data. Other than radio, everything works fine in the test telosb board. Thanks for your valuable time. Regards John J
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