Unkown tuya chip

alnavasa · February 25, 2022, 8:10pm

did you managed to detach the relays?

stosoorok · February 25, 2022, 10:20pm

What do you mean?

alnavasa · February 25, 2022, 10:31pm

To make them dry contact relays

stosoorok · February 26, 2022, 12:12am

Oh okay, I didn’t make dry contacts. I use Sonoff mini’s for dry contact.

alnavasa · February 26, 2022, 10:41am

I repurposed a Loratap: Loratap SC500W repurposed and flashed

fisz · February 27, 2022, 9:18pm

Do you still have a pcb left?

ferbulous · March 6, 2022, 7:50am

Hi daniel, do you know if there’s an ESP-12 adaptor for CBU chip?
I kinda botched my 2nd pcb with cbu (wires pulled the pcb trace from the board)

danman · March 6, 2022, 8:14am

No, sorry.

ferbulous · March 6, 2022, 10:07am

Could I request for CBU adapter?
I don’t really have the skills to create the pcb drawing
Maybe I could send cbu chip/device containing cbu to you?
Also, what’s the average cost & shipping fee if I buy from pcbway?

Lionboy · March 6, 2022, 2:02pm

Look at esp c05 i got 1 and is like cbu chip, i dont try to replace and see if work

danman · March 6, 2022, 2:33pm

Sorry, but no. I am busy with other projects.

ferbulous · March 6, 2022, 2:46pm

Thanks!
do you mind taking a picture of both cbu & c05 side to side?
The c05 looks pretty good other than not having the extra 1 pin on the sides

ferbulous · March 6, 2022, 2:47pm

That’s unfortunate, but thanks

Lionboy · March 6, 2022, 3:06pm

C05 - ESP-C3-C05 ESP32-C3 4Mb Module (DT-ESP-C05) Configuration for Tasmota

CBU - CBU Module Datasheet-Tuya IoT Development Platform-Tuya Developer

ferbulous · March 6, 2022, 3:17pm

Yep, saw the datasheets before this, since you have C05 in hand.
Could you take a picture C05 next to CBU chip?
Just need to gauge the size and pins

Lionboy · March 6, 2022, 5:46pm

i don’t have CBU , only i have a ZMAI 90 with CBU on him, when i will open zmai i will post a picture

Lionboy · March 6, 2022, 6:00pm

This is what i have

openshwprojects · March 8, 2022, 6:46pm

Hey all!

I see you’re having issues with non-ESP chips. I think I might have a solution for that. My solution is still very WIP and in early stages of development, but supports Home Assistant right now, at least for relays and PWM leds. TuyaMCU and more is coming soon.

I am working on Tasmota-like firmware replacement for new Tuya chips, which right now supports 3 platforms:

BK7231T (WB2S, WB3S, WB2L, etc)
BK7231N (CB2S, CBU, etc)
XR809 (XR3)

The goal of the project is to add easy Home Assistant and other platforms support for all Tuya devices, without doing ‘brain transplant’ procedure (replacing old chip with ESP).
W600 platform support is also possible.
Please see my related articles here:
https://www.elektroda.com/rtvforum/topic3866123.html
Also, check out my CCWFIO232PK BK7231T step-by-step flashing guide (it was ESP before but now changed to Bekken…):
https://www.elektroda.com/rtvforum/topic3875654.html
Also check out this Qiachip Smart Switch BK7231N/CB2S guide:
https www elektroda com/rtvforum/topic3874289 html
(sorry I can’t post more than two links)

sparkydave · March 9, 2022, 4:48am

Good job!

Now, what would be nice is if it allowed OTA flashing from the stock Tuya rubbish like Tuya-Convert used to…

ferbulous · March 9, 2022, 5:17am

There’s cloudcutter for that, probably another 25 days left before the tools are released