Homemate smart breaker 16A not able to use with tuna cloud cutter

Question

Hello,

I have the following smart breaker from Homemate, but I am not able to use the tuna cloud cutter with this device. https://homemate.co.in/product/switch-breaker/

I am getting the following message:

"The profile you selected did not result in a successful exploit."

The Main Module version, as per the smartlife app, is v1.3.8.

Kindly guide me on which profile I should choose.

Regards

p.kaczmarek2 · Answer

I think you can try multiple other profiles of similiar devices. There is no rule to that. In worst case, you can always use 'wired' method, soldering is easy so it should be not a problem... I can guide you step by step if you want. That kind of device is easily openable. Pads are easy to access.

ciknururko · Answer

I have tried multiple profiles but none of those worked.Kindly guide how to flash it with soldering.Thanks

p.kaczmarek2 · Answer

Can you provide photos from the inside of the device? But in general, please see our Elektroda youtube channel: We have a guide for similiar device: However, now we prefer this flash tool:

ciknururko · Answer

Yes will upload the pcb photos soon

p.kaczmarek2 · Answer

Usually the flashing process should be easier than the one we have shown on our video. Usually you don't have to remove capacitors/other elements from RX/TX lines, because they are not used at all.

ciknururko · Answer

>>20783195If you want any more details please let me know.Also is flashing via OTA not possible ?

p.kaczmarek2 · Answer

I don't know if flashing via OTA is possible. It's hard to tell, it depends on whether there is already a matching profile.

There isn't much on the photos. I can see only the top side of the board. I can also see a possibly AMS1117-3.3V LDO. I can also see an empty space for WiFi module... did you desolder it? Or was it always empty? If there a QFN BK7231 on the bottom side of this board?

ciknururko · Answer

Sorry my bad... uploaded the wrong photos.Will upload the homemate smart breaker photos soon.

ciknururko · Answer

>>20784507Sorry, earlier I posted the pics of wrong pub of some other switch. I was out of town after that.Please find the correct images of the PCB board of the switch. Please let me know if any other detail is needed.

p.kaczmarek2 · Answer

What module is used there? Watch this video: You can desolder module that way and flash it outside circuit

ciknururko · Answer

the module is CB2S.Can you plz guide me which USB to TTL programmer should I buy? Thanks

p.kaczmarek2 · Answer

CB2S is also used on the video I linked, so it should work.

You can use the same USB to UART converted we have on the video, but also remember that you need a stable 3.3V source. 5V would damage CB2S.

There are many other good USB to UART converters around, some of them even with 3.3V output, but I haven't tested them.

ciknururko · Answer

Ok let me first get a usb to ttl programmer

p.kaczmarek2 · Answer

Alternatively, I heard that you can use Arduino or NodeMCU boards in a form of USB to TTL converter. Just put the MCU into RESET state.

ciknururko · Answer

Any tutorial on how to using nodemcu or arduino??

p.kaczmarek2 · Answer

You can check the tutorials for ESP flashing that way and it will be the same.

Still, I can give you a fast version:
1. short RESET to GND so MCU is in the reset state
2. connect RX and TX (swap if needed) to BK
3. connect 3.3V to BK, GND to BK
4. flash, do a 3.3V disconnect power cycle to reboot BK so it can get bus

ciknururko · Answer

Will give it a try. Is there no way to do it via OTA??

p.kaczmarek2 · Answer

As I said in one of the first posts - it can be flashed via OTA only if there is a matching cloudcutter profile. I don't know how to tell which profile should you try, you should just look for similiar devices in the profiles list:
https://openbekeniot.github.io/webapp/devicesList.html
Select Cloudcutter profiles from "Type" dropdown on this page and click apply.

I am always flashing by wires, because I think it's way faster method in case of most devices.

ciknururko · Answer

I can understand it's difficult to suggest a profile. I myself have tried many profiles but none worked for me. My main problem is, I have never done soldering. So I'm very scared to go this way.

Homemate smart breaker 16A not able to use with tuna cloud cutter

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