96 lines
3.2 KiB
Plaintext
96 lines
3.2 KiB
Plaintext
This directory contains the compiled code for the Contiki energy
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estimation demonstration for ACM SenSys 2007. More information is
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available in the handouts/ directory and at the Contiki website:
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http://www.sics.se/contiki/
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* INSTALLATION INSTRUCTIONS
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Cygwin and Java (JRE) needs to be installed. The demo has been tested
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on Microsoft Windows, but probably works under Linux too.
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You need between two and eight Tmote Sky boards to run the demo: one
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sink and between one and seven nodes. The nodes are numbered from 42
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to 48, and 41 is the sink node.
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Step 1: Unpack the zip file
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unzip contiki-energest-demo.zip
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Step 2: Change directory to the demo directory
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cd contiki-energest-demo
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Step 3: Connect the sink node to the PC. Remove all other Tmote Sky
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nodes from the PC.
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Step 4: Upload Contiki to the sink:
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make upload-sink
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Step 5: Remove the sink node from the PC.
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Step 6: Connect one of the non-sink nodes to the PC
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Step 7: Upload Contiki to the node:
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make upload-node-42
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This takes some time. The red LED should be lit when the
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uploading is finished. We have found that in some cases brand
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new Tmote Sky boards seem to cause a problem with Contiki and
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the red LED does not light up. If so, try to wait a few
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minutes (~10 minutes) with the Tmote Sky either inserted in
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the PC, or powered with batteries. If the red LED goes on
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after these minutes, repeat the "make upload-node-XX" to
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upload Contiki again.
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Step 8: Remove the Tmote Sky from the PC.
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Step 9: Insert batteries into the Tmote Sky. The red LED should light
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up.
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Step 10: Repeat step 6 to step 9 for all non-sink nodes. Replace "make
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upload-node-42" with "make upload-node-43", "make
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upload-node-44", and so on.
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Step 11: Insert the sink node to the PC again.
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Step 12: Run the Java program:
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make rundemo
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NOTE: this uses the first Tmote Sky it finds as a
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sink. Therefore, make sure that only one Tmote Sky (the sink) is
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inserted.
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Step 13: Push the "user" button on the Tmote Skys and watch their
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power consumption go up and down.
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* DEMO DESCRIPTION
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Contiki continuously estimates the energy consumption of the
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system. In this demonstration, seven Tmote Sky nodes, running Contiki,
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estimates their energy consumption and send their power to a sink
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node. The sink node is connected to the PC, and reports the nodes'
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power to a Java program. The Java program shows the nodes' power
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consumption for the last second.
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When pushing the button on the nodes, they cycle through seven states
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as below. This is reflected by their power consumption, as shown in
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the Java program. The different states are:
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* Red LED: sending one packet per second
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* Green LED: radio listen 1% duty cycle
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* Green, red LEDs: radio listen 10% duty cycle
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* Blue LED: radio listen 100%
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* Blue, red LEDs: radio listen 10%, CPU low-power mode disabled
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* Blue, green LEDs: sending data 1.2 kilobytes/second
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* Blue, green, red LEDs: sending data 12 kilobytes/second
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When sending data, the radio is turned on for a while before the
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transmission to check if it is possible to send the packet. This is
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the reason why energy is spent on radio listening even when the nodes
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are only sending data.
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