[BL602/BL0937] Yet another Smart Socket 20A (but 16A)

D'oh ... sorry. Stupid me. TIL: There is configuration menu for startup, Thanks.

But: The relais switches of for about half a second when the socket restarts. I guess, that is unavoidable?!

I have a PC plugged into the socket ...

Yes, there is no way to avoid power interruption in such case.
Ideally issue with reboots should be fixed, but that is VERY hard unfortunately 😔

You can achieve your goal simply by replacing or modding relay to be NC (normally closed).

Raufaser wrote:

D'oh ... sorry. Stupid me. TIL: There is configuration menu for startup, Thanks.

But: The relais switches of for about half a second when the socket restarts. I guess, that is unavoidable?!

I have a PC plugged into the socket ...

You could add a capacitor between base and GND of the driver transistor.
The draw from the base and the 10K resistor in conjunction with the capacitor form a simple time delay
.

Thanks guys for the idea with modifying the relais or adding a delay. I will look into that. It would be a very good modification for a lot of my smart plugs, because I use them for all my PCs to track the power consumption. The plugs with Beken chips almost never reboot. But it could happen. BL602 and LN chips ... it happens.

>>20856171

Hello,

I just registered because of this post.
I didn't know until now of how to flash this chips.
Thank you all for your effort.

You mention

"Easy to open with pliers. "

I bought a pack of 4 pcs of this.
I destroyed one if this unit while trying to open.
Completely destroyed the plastic.

Can you or someone do a video or something of how to open this?
Because to me it seemed, when trying to open, that was glued or plastic soldered, I couldn't easily opened.
I have more units waiting for this treatement...

Thank you!

Here is some LSPA9 'how to open' guide: Another ELIVCO LSPA9: BSD342-2110 PCB with [LN882H] and [BL0937]
Here is some video: How to Open a Tuya LSPA9 WiFi Smart Plug Without Damaging It?

give it a go let me know how it went

I like this method, you can use pipe wrench if you don't have clamps, takes a bit longer bit should be quite simple.

Many LSPA9 pieces varies a lot in the terms on the physical connection strength/glue. I had some LSPA9s that were very hard to open, and, on the other hand, I had LSPA9s that were very easy to open, they were almost like no glued at all.

So how did it go, @banid0 ?

>>21140229
Right now I am trying the wireless exploit, that I found out shortly after this, because the mechanic method makes me nightmares.

I am stalling in the simplest part, getting into slow blinking mode as I mentioned in this thread https://www.elektroda.com/rtvforum/topic4040928.html

If you can help..

Do you still have the manual for your socket? It should explain well how to get into AP mode pairing.

>>21140249
I would say it is highly unlikely I find it.
Either was thrown in the garbage or it is "saved" where I cannot find it...

Can we have another suggestion?

My teardowns are always coming with manuals. You can check my LSPA9 topic for the manual that I had:
https://www.elektroda.com/rtvforum/topic3887748.html

In the meantime I found ouy this manual
is is not for my socket, but it only mentions fast blinking

https://www.google.com/url?sa=t&source=web&rc...IQFnoECDQQAQ&usg=AOvVaw2g9RFtlnTuAnHpJiQ_pPAo

could it be it only has flast blinking mode?

I followed your link, thank you, and saw the manual. from memory, it seems similar to the one I had.

I tried holding on and it doesn't go to slow blinking mode...

should I pair it with the tuya app, or will it make worse?

Added after 24 [minutes]:

...

Well I have a lot of thing in house.
Turns out I was trying to do this on a zigbee smart plug... Which obviously doesn't work.

What an idiot, I just lost 4 hours on this...

I was confused by memory...
I bought Aubess zigbee plugs and AWOW wifi plugs...
Let me see if I cant find the wifi ones and try again :'(

Thank you for your help.

I see, but just to be sure, was this plug marked as Zigbee? Maybe somewhere on the case? If not, that is something we certainly need to watch for in the future.

Just to be perfectly clear

THIS ISN'T A CASE OF A BAD MARKED ITEM that the community must be aware.

I have both zigbee and wifi plugs in my network. Mainly zigbee.
I am experienced in both, know perfetly the difference.

It was just a stupid mistake of getting the first one BEING SURE it was an wifi tuya plug and it WASN'T.

Completely my mistake, nevermind and thank you for your help!!!

Added after 44 [minutes]:

Well it is a AWOW EU3S.
I can't find the brand and model as a profile in tuya cloud cutter.

How can I know which is the compatible profile when not appearing in the tuya cloud cutter app?

I tried pairing in the tuya app and it gives am an error when trying to pair in slow blinking mode, and it appears an Wifi hotpot.
is when tryign to connect to hotspot that gives the error.

Well actually there is no way to determine it in a reliable way. That's why I always prefer to flash by UART...

Well, I managed to pair it in fast mode and not in slow mode. It said v1.0.0
I tried all the 1.0.0 versions in tuya cloud cutter with no success.
Then I went to see the one tat is open and broken, and it is an ESP8.... I though it wasn't
It doesn't work with tuya convert, I nought this back in 2020 and tried that method, and it couldn't because the exploit was patched.

I assumed it was because it was a different chip, but no.

What are my options to take if off the cloud and an open source firmware? I am talking without opening and flashing it... OTA...

Thank you!

If it's ESP8266 and Tuya-convert is not working then you need to solder wires.

OK thank you

>>21027185 Hi, i'm new here. I managed to flash the bl602 chip but i'm stuck, because all my values are 0. I see yours is quite working. can you give a hint please?


Update: After OTA "OpenBL602_1.17.756_OTA.bin.xz.ota" the values are ok, but the physical button is not working. ( "17": "Btn;1", )

Update: physical button on my plug tuya plug is "22": "Btn;1" not "17": "Btn;1".

From what i remember i flashed rhia with esp home and not open beken… 😎

>>21274400 i know esphome, can you show me your yaml code?

I have firmware 1.3.18 on wifi socket 16A and can't change firmware on it by wifi, no profiles for this firmware. No software updates in SmartLife.
It BL0937 and T34. Can you help me to cut it from cloud?

bezzubov wrote:

It BL0937 and T34.

Here's the thread for this (or similar) device:
https://www.elektroda.com/rtvforum/topic4042412.html
You will probably need to flash via uart...

>>21423478 thanks a lot

Your T34 has clearly visible pads with solder, so accesing them should be relatively easy...