RAK5205 Power consumption too high

(kastayou) #1

Hi,

The user guide says that the RAK5205 has a minimum power consumption of 14.5uA.

I have measured the power consumption on my new RAK5205 loaded with the latest firmware (2.0.0.6) but I cannot get the value indicated in the user guide.

I have measured the power consumption using a Nordic Semiconductor Power Profiler Kit.

If I zoom on the lowest power zone, I get only an average of 1.5mA.

My node configuration:
app_interval = 180
gps_stime = 60
msg_confirm = 0
power_save = 1

Could you confirm that it is possible to reach 14.5uA using the 2.0.0.6 firmware?

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(taohairui) #2

Hi kastayou,
What‘s join mode that you set? If OTAA mode ,The node need to join the OTAA succesful before it can enter the sleep mode.So I suggest you set ABP mode to measure the low power consumption.

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(kastayou) #3

It was in OTAA mode and I am not sure if the node had successfully joined the network during the measurement. I will redo the measurement.

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(kastayou) #4

Hi,

I have redone my tests in OTAA and I made sure that the node had successfully joined the network.

I have the same results than before (1.5mA in “sleep mode”).

Could you please confirm that the 2.0.0.6 firmware can reach 14uA as advertized ?

edit: typo

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(kastayou) #5

Please, could you tell how to achieve the low power values indicated in the datasheet?

The power consumption is a critical parameter for a tracker. 1.5mA is not something that can be called low power.

Thank in advance for your feedback

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(Vladislav Yordanov) #6

Hi @kastayou,

Could you please tell us more about your measurement setup:

  1. Are you powering the node via the USB port or via a battery?
  2. What is the Nordic Kit setup exactly?

Could you please update the Firmware to Version 2.0.1.8

Regards

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(kastayou) #7

Hi Hobo,

The node is powered by the Nordic Power Profiler Kit and power is provided in the battery power input…
The Power Profiler kit is the exact same product used by RAK:

More information in this video:

Have you tried 2.0.1.8 firmware and can you confirm that with this firmware it is possible to reach 15uA in sleep mode?

If not, can somebody form RAK tell us what was the setup used to measure the 15uA?

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(kastayou) #8

so nobody is able to confirm that the 15uA given in the datasheet is reachable??? :confused:

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(Vladislav Yordanov) #9

Hi @kastayou,

We have no way to measure this. We are waiting for our current ranger should be here next week hopefully. I have been wanting to rest the RAK5205 and other nodes we have for some time. Will update you as soon as we got any results. Will take some time though.

Regards
Vladislav

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(kastayou) #10

Thanks Hobo for the update

I will wait for your feedback.

If somebody else did power consumption measurement, I would be curious to get the results too.

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