[YT] Dynamic sleep (PowerSave 1) for BK7231T/BK7231N/W600/W800 - reducing power usage of WiFi module

kaczmarek,

I would like to ask if it is possible in your firmware to programatically (or anyhow) completely turn off wifi? My goal is to disable wifi after boot+300seconds to prevent overheating and also reduce energy consumption. The intended use case is that the device turns on by pushbutton, turns off by timer, so wifi not needed to operate - but nice to have in the first 5 minutes to tune the script. Unfortunately I was unable to find such command on github.

Thanks in advance

There is no such command because no one has requested anything like that before. I can add such command easily if W600 SDK supports such a feature. Have you tried looking at our W600 SDK?
Or, BK7231 SDK, if you are referring to BK platform.

Alternatively, maybe you want to use a deep sleep with GPIO wakeup?

Hm, thanks, I try to check. By SDK are you referring to "Tuya IoTOS" SDK at github or is there any other SDK that I haven't found? It is the BK7231N.

I checked now deepsleep/pindeepsleep which could be an alternative for energy saving, thank you for pointing out.

But I suspect unfortunately it wouldn't solve my main concern (overheating issue) while operating. That one is not horrible at first sight (normally around 37C when relay off, but I need to put it in a small box so there won't be natural air convection). Also the peak power consumption will occur when the relay is on - when deepsleep would be off.

Edit:
I found SDK on your github and tried to find some wifi-related stuff. Two files ("netcfg_module.h" and "wf_basic_intf.h") were looking interesting. There one can read about some hopefully related functions. But unfortunately I am not a programmer, so cannot decide what "Function: wf_ap_stop" or "typedef int (* FN_NETCFG_STOP)(int type);" would do

As to tell from the title, this command can not be used for LN882H Chipset, right? Or is it meanwhile implemented there?

I think it was implemented on LN882H in some form, but we had some WiFi issues with that and the PowerSave startup was delayed programmatically after the WiFi connect event. @max4elektroda may also know something about it.

Thank you for your fast response.
I tried it on the command line, and temperature dropped from 54°C to 44°C. But first I couldn't get it permanent via Config -> Change Startup command text. After a reboot, the device forgot the command again. Finally got it sticky via the WebApplication-Page. I did put it under Config -> Pin-Settings, where it says "Command".
Later I thought it might be a good idea to OTA the latest firmware 1.17.589. After the OTA update and reboot the device couldn't be accessed via it's IP, but worked physically using the hardware button - might be the Wifi-Issue you were talking of. After diconnecting from mains and re-plugging it was accessible again. Temperature is now even lower (40°C).

just noticed this big LN882H SDK commit https://gitee.com/lightningsemi/ln882h/commit/b2d811378d07960f3800d8b3f0ac3145f961f127

I wonder if there's anything in there that may affect our powersave/wifi issue either directly or indirectly. I can play in a day or two.

@DeDaMrAz re PowerSave on W800, I notice OBK uses W800 SDK v0.00.04 | 2020/06/04. The latest appears to be W800 SDK v1.00.10 | 2023/08/25

the full translated changelog:



and a summary of all changes relating to power consumption since v0.00.04

That's good find, we've spoke about it with @DeDaMrAz yesterday. What a coincidence. Can you link to that new SDK so I can give it a go?

Or at least to try.... because at the moment even I don't know how to handle it. That could kinda mean that I need to create a branch in OpenW800 repo and change linked W800 submodule in main OBK repo PR to test that? I'm not sure yet.

p.kaczmarek2 wrote:

What a coincidence.

alas, not so much of a coincidence @DeDaMrAz mentioned it elsewhere to me and I was having a look around this morning.

https://www.winnermicro.com/upload/1/editor/1692954953451.rar

Maybe this is the right place to ask the question from here: Link
In my opinion the powersave is not working on that chip-type (BK7231N). Regardless if I put any value or leave the field blank, temperature results at the same level.