The raw data rate is 250 kbps. You'll never achieve this in any practical application because of the CSMA channel sharing taking place. The biggest impedance to throughput is clear channel assessments and the CSMA backoffs. The acknowledgment wait period is another big delay. SPI bus speeds also hamper the speed of transmissions. If you were to disable acknowledgments and CSMA and enable DMA on the SPI bus if it's available (in MSP430's), you'll be transmitting a lot faster. This works fine for point-to-point systems in an interference free environment, but typically won't work well for true wireless networks.
-David _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kirak, Hong Sent: Monday, July 14, 2008 11:07 AM To: tinyos-help@millennium.berkeley.edu Subject: [Tinyos-help] data rate of cc2420 on tmote Hi, I found some articles about cc2420 data rate from mailing list. Is it true that maximum reliable data rate is about 50kbps? (without any interferences) Actually I only achieved 30kbps, but I think it's because that I serialized sending. (send -> sendDone -> send -> .) And I didn't touched any registers on CC2420 yet. Thanks, Kirak
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