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Last pixel of string is missing blue!!??

Started by Giannifp, January 23, 2020, 08:59:44 PM

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I have a pretty simple test setup with the F4V3 controller, one differential expansion board (F4V2) and a single smart receiver. 
I run the RGBW test pattern on the controller and I notice the last pixel on the port 1 of the receiver (a) is missing the blue. Basically this port is 5a on the controller. 
Then I begin testing. 
1. Maybe the pixel went bad. I run the test using the test button of the smart receiver and I get blue on the last pixel. Is not the string. 
2. I try port 6a and is the same, as well as 7a and 8a. 
3. I put a 50 pixel string and configure the port for 50 pixels and I get the last pixel of the string missing blue. 
4. Try all the test patterns from the controller and they all miss blue.

What am I missing. Is this an issue with the controller? The receiver? Of even an issue with the test pattern when the expansion is enabled? 

Any help would be appreciated. 
Thanks in advance!

Kensington Graves

Does the last pixel show green, nothing for blue, and then white?  Or does it end at green, skip blue, and then have some mix of green and red instead of white?

My first guess is that you're one channel short on your port configuration.


Try setting to 51 pixels and see what happens. It sounds like it is off by "one byte"
That will at least tell you if the last pixel is good.
Long time Falcon, FPP and xLights user

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