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Witty Pi 4 L3V7 Disabling White LED does not work?

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(@andrew-simpson17)
Posts: 118
Estimable Member Customer
Topic starter
 

Hi,

 

I have done these things:

 

./wittyPi.sh

Option [11] (other settings...)

Option [4] (White LED duration

set value to zero.

nothing happened.

rebooted

Still nothing changed.

 

I then run this:

i2cset -y 1 0x08 39 0

nothing happened.

 

i did this:

sudo nano /etc/rc.local

i2cset -y 1 0x08 39 0

rebooted

Still nothing changed.

 

I finally checked with this:

i2cget -y 1 0x08 39

 

which returned:

0x00

 

So now well and truly stumped 🙂

 

 

 

 

 

This topic was modified 2 days ago 2 times by andrew.simpson17
 
Posted : 17/04/2026 1:46 pm
(@admin)
Posts: 759
Member Admin
 

On the user manual, it is said that:

"White LED duration This parameter will decide how long the white LED should stay on, when Witty Pi blinks it during the sleep. "

So it only affects the blinking during the sleep state. It doesn't make sure the white LED will never get lighted up. If you don't want to see the white LED to light up, you will need to either modify the firmware, or you physically remove the white LED.

By the way, the I2C register with index 39 is not the correct one, the one you wanted to use has index 20 instead.

 

 
Posted : 17/04/2026 3:01 pm
(@andrew-simpson17)
Posts: 118
Estimable Member Customer
Topic starter
 

thanks for quick reply.

In a way I am glad I got this question completely wrong as i had asked an AI engine. Which means I am not going to be replaced just yet.

this light was triggering my radar sensor you see. I have now covered the LED up.

 

I do not think anyone here will benefit from this question so feel free to delete it. I will not be offended.

 

Cheers.

 
Posted : 17/04/2026 6:00 pm
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