TUYA WiFi Curtain Switch - or - a 2 Gang Switch Photos: Teardown: Flashed with: V1.0.3 Config: Pin Role Channel Note 7 TglChanOnTgl / Btn 1 S1 8 TglChanOnTgl / Btn 2 S2 10 WifiLED_n 0 - 24 Rel 1 L1 26 Rel 2 L2 Edit: Config added { vendor: Tuya, bDetailed: 0, name: Tuya Wifi Curtain Module,...

Thanks. It is also worth to add the name from the PCB - DL-0602S

I have a few of these devices, since it's dirt cheap at one of the sellers now, and I wanted to use some of them as a dual relay switch with esphome. However, if both relays are active, the device reboots after a few minutes, even without load. My first assumption is it might be overheating in that scenario, but that seems weird without any load. Does anyone have an idea if it's something that might be easy to fix?

Does it reboot if you power the device from your external 5V power supply? The power supply might not have enough current capability to run two relays. Flash OpenBeken and enable PowerSave 1 mode, maybe in that case it could work.

You were right, in case of an external power supply it has no problem sustaining the 2 relays. Although they are still getting a bit hot over time without load.I would really like to keep using esphome, as it suits my use-case better. (My code running on the device itself, while still being able to check HA sensors)Is it possible to replace the PSU with a better one? Or would that add too much cost? I was thinking of rather going with Aubess 2-gang relays, as they are also pretty cheap, but it would be nice to fix these as well.

I did test with OpenBeken and powersave, and it actually helped. So I went on to open a PR for esphome to implement powersave there as well. Thank you for the help.

Hi all, Someone has the dump of the original firmware ?

Exploring BK7231N/CB2S TUYA WiFi Intelligent Curtain Switch: Teardown, Flashing, and Configuration

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#1 20535452 11 Apr 2023 22:35

obersdoog obersdoog

Level 1

Topic author

Post #1
20535452 11 Apr 2023 22:35

https://www.tomtop.com/p-s6563-6.html

TUYA WiFi Curtain Switch - or - a 2 Gang Switch

Photos:

Teardown:

Flashed with: https://github.com/openshwprojects/OpenBK7231T_App
V1.0.3

Config:

Pin Role Channel Note
7 TglChanOnTgl / Btn 1 S1
8 TglChanOnTgl / Btn 2 S2
10 WifiLED_n 0 -
24 Rel 1 L1
26 Rel 2 L2

Edit: Config added

{
"vendor": "Tuya",
"bDetailed": "0",
"name": "Tuya Wifi Curtain Module",
"model": "Wifi Curtain Module",
"chip": "BK7231N, CB2S",
"board": "DL-0602S",
"flags": "1024",
"keywords": [
"Curtain module",
"2 gang",
"switch"
],
"pins": {
"7": "TglChanOnTgl;1",
"8": "TglChanOnTgl;2",
"10": "WifiLED_n;0",
"24": "Rel;2",
"26": "Rel;1"
},
"command": "",
"image": "https://obrazki.elektroda.pl/5709759800_1681245233.png",
"wiki": "https://www.elektroda.com/rtvforum/topic3971239.html"
}

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#2 20535785 12 Apr 2023 09:24

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

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Post #2
20535785 12 Apr 2023 09:24

Thanks. It is also worth to add the name from the PCB - DL-0602S

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects

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#3 20551593 23 Apr 2023 02:49

xmisterhu xmisterhu

Level 2

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Post #3
20551593 23 Apr 2023 02:49

I have a few of these devices, since it's dirt cheap at one of the sellers now, and I wanted to use some of them as a dual relay switch with esphome. However, if both relays are active, the device reboots after a few minutes, even without load. My first assumption is it might be overheating in that scenario, but that seems weird without any load. Does anyone have an idea if it's something that might be easy to fix?
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#4 20551595 23 Apr 2023 02:52

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

Helpful post? (0)

Post #4
20551595 23 Apr 2023 02:52

Does it reboot if you power the device from your external 5V power supply? The power supply might not have enough current capability to run two relays.

Flash OpenBeken and enable PowerSave 1 mode, maybe in that case it could work.

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects

Helpful post? Buy me a coffee.
ADVERTISEMENT
#5 20552944 24 Apr 2023 00:32

xmisterhu xmisterhu

Level 2

Helpful post? (0)

Post #5
20552944 24 Apr 2023 00:32

You were right, in case of an external power supply it has no problem sustaining the 2 relays. Although they are still getting a bit hot over time without load.

I would really like to keep using esphome, as it suits my use-case better. (My code running on the device itself, while still being able to check HA sensors)

Is it possible to replace the PSU with a better one? Or would that add too much cost? I was thinking of rather going with Aubess 2-gang relays, as they are also pretty cheap, but it would be nice to "fix" these as well.
#6 20553609 24 Apr 2023 14:58

xmisterhu xmisterhu

Level 2

Helpful post? (0)

Post #6
20553609 24 Apr 2023 14:58

I did test with OpenBeken and powersave, and it actually helped. So I went on to open a PR for esphome to implement powersave there as well.

Thank you for the help.
#7 21371580 01 Jan 2025 10:24

lostinblue37 lostinblue37

Level 1

Helpful post? (0)

Post #7
21371580 01 Jan 2025 10:24

Hi all,
Someone has the dump of the original firmware ?
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Topic summary

The discussion focuses on the BK7231N/CB2S-based TUYA WiFi Intelligent Curtain Switch, also identified by the PCB marking DL-0602S. The device was successfully flashed with OpenBK7231T firmware (v1.0.3) and configured for dual relay control. A reported issue involves device rebooting when both relays are activated simultaneously, suspected to be caused by power supply limitations rather than overheating under no load. Testing with an external 5V power supply resolved the reboot problem, though the relays still exhibit some heat generation. Enabling PowerSave mode in OpenBeken firmware mitigated the issue, prompting a pull request to add PowerSave support in esphome for better integration. Considerations were made about replacing the power supply or switching to alternative dual relay modules like Aubess for cost-effectiveness. A request for the original firmware dump was also made.
Summary generated by the language model.

Pin	Role	Channel	Note
7	TglChanOnTgl / Btn	1	S1
8	TglChanOnTgl / Btn	2	S2
10	WifiLED_n	0	-
24	Rel	1	L1
26	Rel	2	L2

Exploring BK7231N/CB2S TUYA WiFi Intelligent Curtain Switch: Teardown, Flashing, and Configuration

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Topic summary