64x32 Display half off: 16 vs 32 scan mode conflict?

[acastles91]

Hello,

I recently purchased 5 of these modules from ebay (https://www.ebay.de/itm/285579711444) and I can only get one half of the display to light up when I run the demos. I know it's not a hardware problem because I the issue is persistent with 5 different modules. This is the second screen that I put up using this amazing library for an art project, and previously it worked, although with different more expensive modules. When compared to the previous modules, the difference I see is that those were 16S, whilst the new ones are 32S. As written in the back of the modules, they are:: 64x32, P4 2121, 32S, V2.0. What does 16S and 32S refer to exactly? Can I pass this value as an option to the demos?

[davemaster]

Greetings,

Could You share the command are You using? Also an Image of your rgb panel output

PD- First thing I always do, check connection, check correct mapping for that connection (regular, adafruit-hat, etc) then, power supply 4A (for each panel)

[acastles91]

Greetings,

Could You share the command are You using? Also an Image of your rgb panel output

PD- First thing I always do, check connection, check correct mapping for that connection (regular, adafruit-hat, etc) then, power supply 4A (for each panel)

Thank you for your help. This is the command I'm using:

demo -D0 --led-rows=32 --led-cols=64

And this is how it looks. I'm attaching also a picture of how it looks from behind, and I'm supplying 5V with a bench power supply.

[davemaster]

try this:

demo -D0 --led-rows=32 --led-cols=32 --led-chain=2 --led-multiplexing=1 (then 2, 3, .... etc), and picture

best regards

PD. What RPi are You using?