HEX RGB LED

[earla]

Hi - I can only light up the first 13 leds on my hex rgb led unit using UiFlow. I set the led number to 37 and tested on both the M5 Core 2 AWS and the M5 Stickc Plus with the exact same results. Am I missing something?

Update: looked at this HEX RGB
unit under a microscope. It looks like this particular unit had soldering problems. There was excess flux, 2 solder blobs and the tops of some leds are melted with bubbled plastic - soldering looks fair. Cleaned board but no change - still only 13 leds

Update 2 - purchased some new ones - all work perfectly and look fine