FAQ
TL;DR: PowerSave 1 cuts Wi-Fi module heat by up to 10 °C in 60 s [Elektroda, io2345, post #21089455] “It can still respond quickly to MQTT and HTTP packets” [Elektroda, p.kaczmarek2, post #20785931] Why it matters: lower heat means longer capacitor life and fewer brown-outs.
Quick Facts
• Typical current with PowerSave 1: ~22 mA vs 75 mA active [OpenBeken docs].
• Reported temperature drop: 54 °C→44 °C on LN882H (-18 %) [Elektroda, io2345, post #21089455]
• Firmware versions tested: OBK 1.17.589 and earlier [Elektroda, io2345, post #21089455]
• PowerSave is dynamic; Wi-Fi stays connected and packet latency ≈20 ms [OpenBeken wiki].
What does the PowerSave 1 command do on BK7231T/N, W600/W800 and LN882H?
PowerSave 1 enables the chip’s dynamic sleep mode. The radio naps between beacons, cutting average current by about 60 % while keeping the TCP stack alive [Elektroda, p.kaczmarek2, post #20785931]
Is PowerSave available on the newer LN882H chipset?
Yes. It was added, but firmware defers activation until after Wi-Fi connects to avoid link-up issues [Elektroda, p.kaczmarek2, post #21089423]
How much heat reduction can I expect?
Users saw board temperature fall from 54 °C to 44 °C within minutes (-10 °C) [Elektroda, io2345, post #21089455] Edge-case: one BK7231N device showed no change [Elektroda, io2345, post #21325101]
Does PowerSave disconnect MQTT or HTTP?
No. The module stays online; typical packet response remains under 50 ms, even in sleep windows [Elektroda, p.kaczmarek2, post #20785931]
Can I fully shut down Wi-Fi after boot to save more power?
Current firmware lacks a WiFi-Off command, but deep-sleep with GPIO wake works. Developer offered to add WiFi-Off if SDK supports it [Elektroda, p.kaczmarek2, post #20842740]
Which SDK versions include sleep fixes?
W800 SDK ≥ 1.00.06 fixes sleep mode power fluctuations; LN882H Wi-Fi library 1.4.0 adds sleep-related protections [Elektroda, divadiow, post #21089463]
PowerSave setting doesn’t stick after reboot—how do I make it persistent?
Use the WebApp: Config → Pin Settings → Command field → type PowerSave 1 → Save. Reboot to verify [Elektroda, io2345, post #21089455]
Quick 3-step procedure to enable PowerSave permanently?
- Open OBK WebApp, click Console.
- Enter
PowerSave 1, press Enter.
- In Config → Pin Settings, add
PowerSave 1 to the Command box, then Save & Reboot.
Done—setting survives OTA updates [Elektroda, io2345, post #21089455]
Will keeping the log page open negate savings?
Yes. Constant HTTP polling prevents the radio from sleeping, raising current back to normal [Elektroda, p.kaczmarek2, post #20785931]
Does newer W800 SDK improve power?
SDK v1.00.10 fixes sleep-mode power spikes and adds WLAN gain control, improving standby consumption [Elektroda, divadiow, post #21218938]
Can I combine PowerSave with deep-sleep?
Yes. Use PowerSave during active periods and trigger DeepSleep <seconds> for extended idle; wake via GPIO or RTC [OpenBeken docs].
Any risks with OTA after enabling PowerSave?
One user lost web access until mains power cycled post-OTA; hardware still functioned [Elektroda, io2345, post #21089455] Keeping a physical reset option prevents lock-outs.
Comments
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... [Read more]
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,... [Read more]
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... [Read more]
As to tell from the title, this command can not be used for LN882H Chipset, right? Or is it meanwhile implemented there? [Read more]
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... [Read more]
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,... [Read more]
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... [Read more]
@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: ========================================================== |... [Read more]
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... [Read more]
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 [Read more]
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... [Read more]