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The latency with the default setting settings is in on the order of 1 second per hop. While this allows for excellent power consumption, for some applications, this is too slow. In this part, we will explore the range of achievable latencies, by using the LEDPing sample application.
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- Start the
LEDPingapplication, and connect to the manager. - Enter the MAC address of the mote in the text field, then press start .
Using a stopwatch, what is the time it takes for the LED to switch ON 10 times?
Info icon false title Answer 28.1: What is the average RTT of the network (round-trip time)?
Info icon false title Answer 28.2:
With backbone mode
| Tip |
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"backboneBackbone" is a mode where all cells of the communication schedule are scheduled. This yields very low latencies, at the cost of an increased power consumption. |
on On the manager’s CLI, enter:
Code Block > login user > show config
what What is the value of
bbmodeparameter?Info icon false title Answer 28.3: what What is the value of
bbsizeparameter?Info icon false title Answer 28.4: Enter the following commands:
Code Block > set config bbmode 2 > set config bbsize 2
power Power cycle both the manager and the mote. Wait for the mote to join.
Repeat the measurements above. What is the RTT now?
Info icon false title Answer 28.5: