Hi there, I flashed this socket to tasmota and calibrate the Voltage, Current and Power consumption. But now if I disconnect the load it still shows me 0.4A of current. With 100W lamp. No Load. The current, the apparent power and the reactive power are showing strange values. What I am doing...

This is a known issue with BL0937. You can try to mitigate by calibrating at lower load and by enabling flag to zero power when relay is open Code: text Expand Select all Copy to clipboard[Power] Set power and current to zero if all relays are open

Tasmota Socket Shows 0.4A Current With No Load After Calibration

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#1 21635257 14 Aug 2025 22:15

badboy3004 badboy3004

Level 6

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Post #1
21635257 14 Aug 2025 22:15

Hi there,
I flashed this socket to tasmota and calibrate the Voltage, Current and Power consumption. But now if I disconnect the load it still shows me 0.4A of current.

With 100W lamp.

No Load. The current, the apparent power and the reactive power are showing strange values.

What I am doing wrong?

Thanks.
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#2 21636244 16 Aug 2025 11:22

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home
Helpful post? (0)

Post #2
21636244 16 Aug 2025 11:22

This is a known issue with BL0937. You can try to mitigate by calibrating at lower load and by enabling flag to zero power when relay is open
Code: text Expand Select all Copy to clipboard
[Power] Set power and current to zero if all relays are open

https://github.com/openshwprojects/OpenBK7231T_App/blob/main/docs/flags.md

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 21637780 18 Aug 2025 11:24

badboy3004 badboy3004

Level 6

Topic author Helpful post? (0)

Post #3
21637780 18 Aug 2025 11:24

Thanks for your answer.
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Tasmota Socket Shows 0.4A Current With No Load After Calibration – Calibration Issue?

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