Since there is absolutely no Model name: The board is marked ZH-Z17 Rev. B (on the bottom). On the side it's marked: ZH-Z17 Rev. A 🤷 This Curtain Module is similar to 2CH WiFi Switch Module (clone) or QS-WIFI-S10-C04 which also uses the BK7231N PIN CB2S Board P6 LED P7 Relais L2 P8 internal...

Name: Flashing OpenBK on CB2S/BK7231N WI-FI Curtain Module ZH-Z17 Rev. A/B
Uploaded: 2024-06-22T23:03:25+02:00
Description: Since there is absolutely no Model name: The board is marked ZH-Z17 Rev. B (on the bottom). On the side it's marked: ZH-Z17 Rev. A 🤷 This Curtain Module is similar to 2CH WiFi Switch Module (clone) or QS-WIFI-S10-C04 which also uses the BK7231N PIN CB2S Board P6 LED P7 Relais L2 P8 internal...

Thanks for sharing, but I think you've forgot PowerSave 1 command. This can indeed help. See what happens without power save:

Dynamic power saves reduces the energy usage by sleeping the MCU for a very short intervals when there is nothing to do, it sleeps for like 25ms or so many times per second. PowerSave could be enabled in OBK by default, but I had some reports saying that there are issues so I haven't yet decided to enable it. For now, I am certain that PowerSave does not work well with IR (due to the precise interrupts needed) and with BL0937 (for the very same reason).

you mean in regard of the heating problem? will test.... ... I must admit its much better now. 💪

Yes, PowerSave is very helpful on many platforms:

do you know why these modules dump so much energy unnecessarily?

im curious about the bin you've uploaded. The extraction from that is just Code: TextLog in, to see the code and the Tuya API response lists it as 1CH Wi-Fi Curtain Module 2 Added after 5 [minutes]: Added after 2 [minutes]:oh. it's already in the list

nice finding. but its really the binary that i have extracted from this device! maybe a cheap clone (it can to only 3A) with a wrong fw.....so it would be DOA anyway. I admit I never tested the orig fw.

i swaped the CB2s to a ESP-02s for testing. The ESP pins connect like so; PIN CB2S BoardESP-02sP6LEDIO5 P7Relais L2IO4P8internal switch buttonIO13P23Relais L1ADCP24Switch relais L1IO12P26Switch relais L2IO14GNDGNDGNDVCC3.3VVCCTXncTXRXncRX

Flashing OpenBK on CB2S/BK7231N WI-FI Curtain Module ZH-Z17 Rev. A/B

vincenzoernst1 1251 8

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#1 21127284 21 Jun 2024 15:39

vincenzoernst1 vincenzoernst1

Level 6
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Post #1
21127284 21 Jun 2024 15:39

Since there is absolutely no Model name: The board is marked ZH-Z17 Rev. B (on the bottom). On the side it's marked: ZH-Z17 Rev. A 🤷

This Curtain Module is similar to 2CH WiFi Switch Module (clone) or QS-WIFI-S10-C04 which also uses the BK7231N

PIN CB2S Board
P6 LED
P7 Relais L2
P8 internal switch button
P23 Relais L1
P24 Switch relais L1
P26 Switch relais L2
GND GND
VCC 3.3V
TX nc
RX nc

I used the Itchiptool for communication, since its WAY better (than hiddownloader tool) when using Linux. The bus was not detected at 1st but as soon as I disconnected the board from 3.3V, put CEN to ground, started to flash and reconnected the board to 3.3V, the bus was detected and the flashing/backup started.

Here in comparison the with the similar QS-WIFI-S10-C04

I find this modul better than the QS-WIFI-S10-C04 cause the Tuya modul can easily replaced by a ESP-02s which can run Tasmota alternativly (Which I find has better shutter support. This is important for not destroying your shutter motors. This i my top concern.).

Code: text Expand Select all Copy to clipboard
{ "vendor": "OEM", "bDetailed": "0", "name": "2 CH WI-FI Curtain Module", "model": "ZH-Z17", "chip": "BK7231N", "board": "ZH-Z17", "flags": "1024", "keywords": [ "CB2S", "Shutter", "Curtain", "yellow", "roller", "blinds" ], "pins": { "6": "WifiLED;0", "7": "Rel;2", "8": "Btn_Tgl_All;0", "23": "Rel;1", "24": "TglChanOnTgl;1", "26": "TglChanOnTgl;2" }, "command": "PowerSave 1", "image": "https://obrazki.elektroda.pl/7826432900_1718979671.jpg", "wiki": "https://www.elektroda.com/rtvforum/topic4061116.html" }

The whole modul will get quiet warm so i think it wont last for ever (e.g. the condensators/elkos are non ESR ones).

Attachments:

WI-FI_Curtain_Modul_ZH-Z17_Manual.pdf Download (847.53 KB)

WI-FI_Curtain_Modul_Backup.bin Download (2 MB)
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#2 21127576 21 Jun 2024 21:03

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

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21127576 21 Jun 2024 21:03

Thanks for sharing, but I think you've forgot "PowerSave 1" command. This can indeed help. See what happens without power save:
https://www.elektroda.com/rtvforum/topic3898805.html

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 21127597 21 Jun 2024 21:18

vincenzoernst1 vincenzoernst1

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Post #3
21127597 21 Jun 2024 21:18

you mean in regard of the heating problem? will test....

... I must admit its much better now. 💪
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#4 21128694 22 Jun 2024 23:03

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

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Post #4
21128694 22 Jun 2024 23:03

Yes, PowerSave is very helpful on many platforms:

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.
#5 21128723 22 Jun 2024 23:34

vincenzoernst1 vincenzoernst1

Level 6

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Post #5
21128723 22 Jun 2024 23:34

do you know why these modules dump so much energy unnecessarily?
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#6 21129091 23 Jun 2024 12:33

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

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Post #6
21129091 23 Jun 2024 12:33

Dynamic power saves reduces the energy usage by sleeping the MCU for a very short intervals when there is nothing to do, it sleeps for like 25ms or so many times per second. PowerSave could be enabled in OBK by default, but I had some reports saying that there are issues so I haven't yet decided to enable it. For now, I am certain that PowerSave does not work well with IR (due to the precise interrupts needed) and with BL0937 (for the very same reason).

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.
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#7 21131179 24 Jun 2024 22:48

divadiow divadiow

Level 34

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Post #7
21131179 24 Jun 2024 22:48

im curious about the bin you've uploaded. The extraction from that is just

Code: Text
Log in, to see the code

and the Tuya API response lists it as "1CH Wi-Fi Curtain Module 2"

Added after 5 [minutes]:

https://github.com/OpenBekenIOT/webapp/pull/128

Added after 2 [minutes]:

oh. it's already in the list https://www.elektroda.com/rtvforum/topic4040700.html
#8 21131581 25 Jun 2024 11:33

vincenzoernst1 vincenzoernst1

Level 6

Topic author Helpful post? (0)

Post #8
21131581 25 Jun 2024 11:33

nice finding. but its really the binary that i have extracted from this device! maybe a cheap clone (it can to only 3A) with a wrong fw.....so it would be DOA anyway. I admit I never tested the orig fw.
#9 21140993 02 Jul 2024 22:46

vincenzoernst1 vincenzoernst1

Level 6

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Post #9
21140993 02 Jul 2024 22:46

i swaped the CB2s to a ESP-02s for testing. The ESP pins connect like so;

PIN CB2S Board ESP-02s
P6 LED IO5
P7 Relais L2 IO4
P8 internal switch button IO13
P23 Relais L1 ADC
P24 Switch relais L1 IO12
P26 Switch relais L2 IO14
GND GND GND
VCC 3.3V VCC
TX nc TX
RX nc RX
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Topic summary

The discussion revolves around flashing OpenBK firmware on the CB2S/BK7231N Wi-Fi Curtain Module, specifically the ZH-Z17 Rev. A/B models. The user initially faced issues with bus detection during flashing, which were resolved by manipulating the power connections. Participants highlighted the importance of the "PowerSave 1" command to reduce energy consumption, particularly addressing heating problems. The conversation also touched on the energy inefficiency of these modules and the potential for dynamic power saving features. Additionally, there was a mention of extracting firmware binaries and testing with an ESP-02s module, indicating compatibility and pin connections.
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Flashing OpenBK on CB2S/BK7231N WI-FI Curtain Module ZH-Z17 Rev. A/B

PIN CB2S	Board
P6	LED
P7	Relais L2
P8	internal switch button
P23	Relais L1
P24	Switch relais L1
P26	Switch relais L2
GND	GND
VCC	3.3V
TX	nc
RX	nc

PIN CB2S	Board	ESP-02s
P6	LED	IO5
P7	Relais L2	IO4
P8	internal switch button	IO13
P23	Relais L1	ADC
P24	Switch relais L1	IO12
P26	Switch relais L2	IO14
GND	GND	GND
VCC	3.3V	VCC
TX	nc	TX
RX	nc	RX

Flashing OpenBK on CB2S/BK7231N WI-FI Curtain Module ZH-Z17 Rev. A/B

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