Energy Consumption

[rajesh gupta]

Dear All,

I am working with crossbow motes (micaZ and tmote sky) and while going through there data sheet I found different modes of operation, which are

	Min	Nom	Max	Unit
Current Consumption: MCU on, Radio RX		21.8	23	mA
Current Consumption: MCU on, Radio TX		19.5	21	mA
Current Consumption: MCU on, Radio off		1800	2400	µA
Current Consumption: MCU idle, Radio off		54.5	1200	µA
Current Consumption: MCU standby		5.1	21.0	µA

I know that Castalia models energy using power consumption according to CC2420 data sheet.

Can some advise me how to model or take into account energy consumed when the Radio is off but MCU (micro controller) is in ON or IDLE condition.

Thanks.

Regards,

Rajesh Gupta

IIIT Allahabad

India

[Athanassios Boulis]

In Castalia, apart from the power consumption of the radio we also have a baseline power consumption parameter (models the power consumption of electronics/MCU).

SN.node[*].ResourceManager.baselineNodePower

it's default value is 6mW. This is a constant power consumed by the sensor node.

Unfortunately there is only one value for the baseline power consumption.... you cannot easily have what you want (you list at least two values, one for MCU on and one for MCU idle)

You could create another parmeter in the resource manager for when the MCU is idle... but then you will have to model how the MCU gets in and out of idle mode.

We chose to keep it simple, because usually in practice WSN programmers don;t really make use of the idling capabilities of the MCU.

[rajesh gupta]

Thanks for the reply Dr. Boulis. That really helped me.

Regards,

Rajesh Gupta

IIIT Allahabad

[gpg]

[Daniel R Matos]

 I think Castalia take in account only energy spent by the radio module. Every think else is ignored, I'm right?

2013/5/19 gpg <adho...@gmail.com>

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Daniel R Matos
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[Thanassis Boulis]

Almost right. 

You can also define the baseline power consumption, that can describe a constant power consumption, e.g. from the processor and electronics. We cannot change this power dynamically, as it would happen in reality with a processor, because we do not have a processing model in Castalia.

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