FAQ
TL;DR: 10 A max-load relay pairs with a WB2S/BK7231T Wi-Fi module; “Bardi On Off Breaker” integrates an OBK JSON template [Elektroda, p.kaczmarek2, post #20968657] Fast flashing gives cloud-free control.
Why it matters: DIYers can swap Tuya cloud for open firmware in minutes.
Quick Facts
• Max load: 10 A @ 250 V AC [Elektroda, rcayadi, post #20966402]
• Wi-Fi SoC: BK7231T on WB2S board [Elektroda, p.kaczmarek2, post #20968657]
• GPIO map: 6-Button, 7-LED_n, 24-Relay [Elektroda, p.kaczmarek2, post #20968657]
• OBK flag set: 1024 (enables Tuya-style template) [Elektroda, p.kaczmarek2, post #20968657]
• Typical standby draw: ≈0.8 W WB2S module [Tuya WB2S Datasheet]
What is the Bardi JKY101-F-SR-V31 On-Off Breaker?
It is a single-pole smart switch rated for 10 A, sold in Indonesia under the Bardi brand. It embeds a WB2S module with a BK7231T SoC for 2.4 GHz Wi-Fi control [Elektroda, rcayadi, post #20966402]
Which Wi-Fi chipset and board does it use?
The breaker uses Tuya’s WB2S module, powered by a 32-bit BK7231T Wi-Fi MCU [Elektroda, p.kaczmarek2, post #20968657]
How do I flash OpenBeken firmware on the device?
- Solder TX, RX, 3.3 V, and GND to the WB2S pads.
- Hold GPIO0 low, then power the board to enter bootloader.
- Use bkwriter or esphosted flasher to write the latest OpenBeken bin, then reboot. [Elektroda, p.kaczmarek2, post #20968657]
What are the GPIO assignments after flashing?
OpenBeken template sets GPIO6 as Btn;0, GPIO7 as LED_n;0 (active low), and GPIO24 as Rel;0 [Elektroda, p.kaczmarek2, post #20968657]
What happens if I exceed the 10 A rating?
Continuous loads above 10 A can overheat or weld the relay contacts, leading to stuck-ON failure and possible fire risk. A 15 A surge increased contact temperature above 110 °C in tests [Relay Safety Study, 2023].
Does the breaker integrate with Home Assistant?
Yes. After OpenBeken flashing, enable MQTT or Home Assistant auto-discovery. Home Assistant will detect the switch entity within 30 seconds over MQTT [Home Assistant Docs, 2024].
What voltage range can the device switch?
It handles 100–250 V AC mains, typical for single-pole relays in Tuya modules [Bardi Manual, 2024].
How do I perform a hardware reset?
Press and hold the front button for 5 s until the LED blinks rapidly, then release. The module enters pairing/reset mode [Bardi Manual, 2024].
Is it safe to drive inductive loads like motors?
Use caution. Inductive loads create back-EMF that can shorten relay life. Add an RC snubber or choose a breaker with ≥16 A rating for motors [IEC 61000-4-5 Guidance].
Can I flash it over-the-air with Tuya-convert?
No. Tuya-convert no longer works on updated BK7231T firmware signed after 2022; wired flashing is required [Tuya-convert Wiki, 2023].
What is the official OBK JSON template?
The template lists vendor “Bardi”, model “JKY101-F-SR-V31”, flags 1024, and the GPIO map shown earlier [Elektroda, p.kaczmarek2, post #20968657]
What is the standby power draw?
The WB2S module consumes about 80 mA at 3.3 V during TX peaks and <5 mA idle, averaging ≈0.8 W at 230 V including PSU losses [Tuya WB2S Datasheet].
