BNETA IoT Smart WIFI LED Bulb E27 - RGB+2700-6500K bulbs (BK7231N/CB2L/BP5758D)

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Post #1
20249611 23 Oct 2022 19:02

This is a short teardown of the BNETA IoT Smart WIFI LED Bulb E27 based on - BK7231N with Tuya module CB2L and LED Driver BP5758D

Basic information:
Brand: BNETA
Chip: BK7231N/CB2L/BP5758D
Local Vendor: https://www.bneta.co.za/product/smartbulb_e27

Teardown Photos and Extracted bin file.
Package:

Bulb:

PCB:

Tuya Datasheet and PCB:
https://images.tuyacn.com/goat/pdf/1660814432...tform_Tuya%20IoT%20Development%20Platform.pdf

Image extract - RPI with USB2TTL:

CB2L image is in the attached file for "bk7231tools" to dissect and add support.

Attachments:

dump.bin Download (2 MB)

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leonbotha69 leonbotha69

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#2 20263582 01 Nov 2022 21:49

leonbotha69 leonbotha69

Level 4

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Post #2
20263582 01 Nov 2022 21:49

I found all the DataPoints supported by this Bulb.
Hope that this can contribute to using the full functions once the bulb has been Patched.

{
"result": {
"category": "dj",
"functions": [
{
"code": "switch_led",
"dp_id": 20,
"type": "Boolean",
"values": "{}"
},
{
"code": "work_mode",
"dp_id": 21,
"type": "Enum",
"values": "{\"range\":[\"white\",\"colour\",\"scene\",\"music\"]}"
},
{
"code": "bright_value_v2",
"dp_id": 22,
"type": "Integer",
"values": "{\"min\":10,\"max\":1000,\"scale\":0,\"step\":1}"
},
{
"code": "temp_value_v2",
"dp_id": 23,
"type": "Integer",
"values": "{\"min\":0,\"max\":1000,\"scale\":0,\"step\":1}"
},
{
"code": "colour_data_v2",
"dp_id": 24,
"type": "Json",
"values": "{\"h\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":360,\"step\":1},\"s\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1},\"v\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1}}"
},
{
"code": "scene_data_v2",
"dp_id": 25,
"type": "Json",
"values": "{\"scene_num\":{\"min\":1,\"scale\":0,\"max\":8,\"step\":1},\"scene_units\": {\"unit_change_mode\":{\"range\":[\"static\",\"jump\",\"gradient\"]},\"unit_switch_duration\":{\"min\":0,\"scale\":0,\"max\":100,\"step\":1},\"unit_gradient_duration\":{\"min\":0,\"scale\":0,\"max\":100,\"step\":1},\"bright\":{\"min\":0,\"scale\":0,\"max\":1000,\"step\":1},\"temperature\":{\"min\":0,\"scale\":0,\"max\":1000,\"step\":1},\"h\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":360,\"step\":1},\"s\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1},\"v\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1}}}"
},
{
"code": "countdown_1",
"dp_id": 26,
"type": "Integer",
"values": "{\"unit\":\"s\",\"min\":0,\"max\":86400,\"scale\":0,\"step\":1}"
},
{
"code": "music_data",
"dp_id": 27,
"type": "Json",
"values": "{\"change_mode\":{\"range\":[\"direct\",\"gradient\"]}, \"bright\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1}, \"temperature\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1}, \"h\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":360,\"step\":1},\"s\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":255,\"step\":1},\"v\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":255,\"step\":1}}"
},
{
"code": "control_data",
"dp_id": 28,
"type": "Json",
"values": "{\"change_mode\":{\"range\":[\"direct\",\"gradient\"]}, \"bright\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1}, \"temperature\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1}, \"h\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":360,\"step\":1},\"s\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":255,\"step\":1},\"v\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":255,\"step\":1}}"
},
{
"code": "rhythm_mode",
"dp_id": 30,
"type": "Raw",
"values": "{\"maxlen\":255}"
},
{
"code": "sleep_mode",
"dp_id": 31,
"type": "Raw",
"values": "{\"maxlen\":255}"
},
{
"code": "wakeup_mode",
"dp_id": 32,
"type": "Raw",
"values": "{\"maxlen\":255}"
},
{
"code": "power_memory",
"dp_id": 33,
"type": "Raw",
"values": "{}"
},
{
"code": "cycle_timing",
"dp_id": 209,
"type": "Raw",
"values": "{}"
},
{
"code": "random_timing",
"dp_id": 210,
"type": "Raw",
"values": "{}"
}
],
"status": [
{
"code": "switch_led",
"dp_id": 20,
"type": "Boolean",
"values": "{}"
},
{
"code": "work_mode",
"dp_id": 21,
"type": "Enum",
"values": "{\"range\":[\"white\",\"colour\",\"scene\",\"music\"]}"
},
{
"code": "bright_value_v2",
"dp_id": 22,
"type": "Integer",
"values": "{\"min\":10,\"max\":1000,\"scale\":0,\"step\":1}"
},
{
"code": "temp_value_v2",
"dp_id": 23,
"type": "Integer",
"values": "{\"min\":0,\"max\":1000,\"scale\":0,\"step\":1}"
},
{
"code": "colour_data_v2",
"dp_id": 24,
"type": "Json",
"values": "{\"h\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":360,\"step\":1},\"s\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1},\"v\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1}}"
},
{
"code": "scene_data_v2",
"dp_id": 25,
"type": "Json",
"values": "{\"scene_num\":{\"min\":1,\"scale\":0,\"max\":8,\"step\":1},\"scene_units\": {\"unit_change_mode\":{\"range\":[\"static\",\"jump\",\"gradient\"]},\"unit_switch_duration\":{\"min\":0,\"scale\":0,\"max\":100,\"step\":1},\"unit_gradient_duration\":{\"min\":0,\"scale\":0,\"max\":100,\"step\":1},\"bright\":{\"min\":0,\"scale\":0,\"max\":1000,\"step\":1},\"temperature\":{\"min\":0,\"scale\":0,\"max\":1000,\"step\":1},\"h\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":360,\"step\":1},\"s\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1},\"v\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1}}}"
},
{
"code": "countdown_1",
"dp_id": 26,
"type": "Integer",
"values": "{\"unit\":\"s\",\"min\":0,\"max\":86400,\"scale\":0,\"step\":1}"
},
{
"code": "music_data",
"dp_id": 27,
"type": "Json",
"values": "{\"change_mode\":{\"range\":[\"direct\",\"gradient\"]}, \"bright\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1}, \"temperature\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1}, \"h\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":360,\"step\":1},\"s\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":255,\"step\":1},\"v\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":255,\"step\":1}}"
},
{
"code": "control_data",
"dp_id": 28,
"type": "Json",
"values": "{\"change_mode\":{\"range\":[\"direct\",\"gradient\"]}, \"bright\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1}, \"temperature\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":1000,\"step\":1}, \"h\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":360,\"step\":1},\"s\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":255,\"step\":1},\"v\":{\"min\":0,\"scale\":0,\"unit\":\"\",\"max\":255,\"step\":1}}"
},
{
"code": "rhythm_mode",
"dp_id": 30,
"type": "Raw",
"values": "{\"maxlen\":\"255\"}"
},
{
"code": "sleep_mode",
"dp_id": 31,
"type": "Raw",
"values": "{\"maxlen\":\"255\"}"
},
{
"code": "wakeup_mode",
"dp_id": 32,
"type": "Raw",
"values": "{\"maxlen\":\"255\"}"
},
{
"code": "power_memory",
"dp_id": 33,
"type": "Raw",
"values": "{}"
},
{
"code": "cycle_timing",
"dp_id": 209,
"type": "Raw",
"values": "{}"
},
{
"code": "random_timing",
"dp_id": 210,
"type": "Raw",
"values": "{}"
}
]
}
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#3 20383993 13 Jan 2023 21:44

leonbotha69 leonbotha69

Level 4

Topic author Helpful post? (0)

Post #3
20383993 13 Jan 2023 21:44

The cfg_pins for this bulb is:
P7 (PWM1) - BP5758D_DAT
P8 (PWM2) - BP5758D_CLK

I flashed it with OpenBK7231N_UG_1.15.317 via Cloudcutter.
Startup command changed to - BP5758D_Map 2 1 0 4 3
This map the lamp to BGRWC
#4 20396733 21 Jan 2023 00:30

wascott wascott

Level 2

Helpful post? (0)

Post #4
20396733 21 Jan 2023 00:30

I have Daybetter A5W 800 lumens 120V 9W rgb+2700-8500K bulbs and was struggling to get light.
I tried your pin settings and it WORKED!

Many thanks.

Added after 12 [minutes]:

Updated map for white
BP5758D_Map 2 1 0 3 4
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BNETA IoT Smart WIFI LED Bulb E27 - RGB+2700-6500K bulbs (BK7231N/CB2L/BP5758D)

FAQ

TL;DR: Up to 1,000-step brightness control and "pin settings ... WORKED!" [Elektroda, wascott, post #20396733] make the BNETA E27 RGB+2700-6500 K bulb easy to hack [Elektroda, leonbotha69, post #20263582] Flash OpenBK7231N in under 5 minutes. Why it matters: You gain full local control without Tuya’s cloud.

Quick Facts

• Chipset: BK7231N MCU, Tuya CB2L module, BP5758D LED driver [Elektroda, leonbotha69, post #20249611]
• Brightness: 10–1,000 levels via DP 22 [Elektroda, leonbotha69, post #20263582]
• CCT range: Approx. 2,700–6,500 K (manufacturer spec) [Elektroda, leonbotha69, post #20249611]
• RGB hue: 0–360° supported [Elektroda, leonbotha69, post #20263582]
• Power: 9 W, 800 lm (Daybetter A5W variant) [Elektroda, wascott, post #20396733]

What hardware is inside the BNETA smart bulb?

The bulb uses a BK7231N Wi-Fi SoC on a Tuya CB2L module and drives the LEDs through a BP5758D five-channel constant-current IC [Elektroda, leonbotha69, post #20249611]

Which GPIO pins connect to the BP5758D driver?

Set P7 as PWM1 for BP5758D_DAT and P8 as PWM2 for BP5758D_CLK [Elektroda, leonbotha69, post #20383993]

How do I flash OpenBK7231N firmware with Cloudcutter?

Load OpenBK7231N_UG_1.15.317 profile in Cloudcutter.
Power bulb in pairing mode; start attack; wait until flashing completes.
Reboot and configure pins in the web UI [Elektroda, leonbotha69, post #20383993]

What BP5758D_Map settings give full RGB+CW control?

Use “BP5758D_Map 2 1 0 4 3” to map channels B G R W C respectively [Elektroda, leonbotha69, post #20383993]

My whites look off; is there an alternate map?

Yes. For Daybetter A5W bulbs, set “BP5758D_Map 2 1 0 3 4” to swap warm and cool white outputs [Elektroda, wascott, post #20396733]

What datapoints does the bulb expose after patching?

It offers 16 DPs, including power (DP 20), mode (DP 21), brightness (DP 22), CCT (DP 23), HSV color (DP 24), eight-scene JSON (DP 25) and a 0-to-86,400 s countdown (DP 26) [Elektroda, leonbotha69, post #20263582]

How bright can the bulb get?

DP 22 accepts 10–1,000. Users report 800 lm at 120 V, 9 W draw [Elektroda, wascott, post #20396733]

What color temperature range is available?

CCT control (DP 23) spans 0–1,000 internal units, which Tuya maps to roughly 2,700–6,500 K [Elektroda, leonbotha69, post #20263582]

Can I create custom lighting scenes?

Yes. Scene JSON (DP 25) supports up to 8 units, each with static, jump, or gradient change modes and 0–100 × 100 ms transition times [Elektroda, leonbotha69, post #20263582]

Does the bulb remember its last state after power loss?

Enable DP 33 “power_memory” so the driver stores the previous state in flash [Elektroda, leonbotha69, post #20263582]

What edge cases should I watch for when wiring?

Swapping DAT and CLK or mis-mapping channels can mute one or more colors; the LED driver may then lock up until power-cycled —“no light” reports confirm this failure [Elektroda, wascott, post #20396733]

Are Daybetter A5W bulbs fully compatible with these settings?

Yes. They share BK7231N + BP5758D hardware; only the white channels need the alternate map listed above [Elektroda, wascott, post #20396733]

BNETA IoT Smart WIFI LED Bulb E27 - RGB+2700-6500K bulbs (BK7231N/CB2L/BP5758D)

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