raspberry pi camera different white balance

Question

I made a module that makes 360 degree photos. When I trigger a photo at the same time, with the same script on two different RPis with cameras, the white balance is different. I set the auto white balance to 'off' and set the constant value of white balance gains, but when I check the photos, the white balance is very different. Value between abw_gain which I set and output awb_gain is different too. Here's the code and photos:

camera.awb_mode = 'off'
camera.exposure_mode = 'off'
camera.drc_strength='off'

camera.awb_gains = (Fraction(453,257),Fraction(247,257))
g = camera.awb_gains
print g, "wb gains #0"
g = camera.awb_gains
print g, "wb gains #1"

/output#0/ g = (Fraction(451, 256), Fraction(123, 128)) "wb gains #0"

/output#1/ g = (Fraction(451, 256), Fraction(123, 128)) "wb gains #1"

Outputs are the same on both cameras.

This image is from the first camera:

Below is the image from the second camera:

Answer 1

Set the gain manually using the function:

cameraObject._set_awb_gains((redgain, bluegain))

Parameters can be integer or float ranging from 0 to 8.