NeoPixel Service Issues

I am trying to incorporate some color into my Inmoov so I started messing around with NeoPixels, I have a rwo of 10 LEDS wired up. When i use the arduino libraries to test the strip it works fine. But when I use the neopixel service and attatch the LEDs no matter what the first 2 LED light bright white and then nothing happens. If i change the anitmation then another LED will light white up to 4 LEDs then nothing happens after that. 


Any thoughts? 

calamity's picture

hi brotherbrown can you tell

hi brotherbrown

can you tell me what kind of arduino you using and connect on which pin? I will try to reproduce the problem

also what version on MRL are you using?

brotherbrown831's picture

Im using MRL 1737, MRL Comm

Im using MRL 1737, MRL Comm v.40, MEGA 2560 pin 7. Interstingly when i swap to pin D3 i get much better results. The colors and animations mostly work although still not perfect. I wonder if there is an issue with sending NeoPixal signal out pin D7.

calamity's picture

Pin  D3 and D7 are not on the

Pin  D3 and D7 are not on the same pin register in the arduino (PORTE and PORTH) so maybe there is a bug for the PORT on H code in the neopixel code, I will look for it.

The neopixel devices are not working well with the use of servo, or anything that use a lot of interrupts. If you are using it on a board that run many servo, you will see glitch in the animations. I suggest you to use it on a board that don't run servo for a better result


brotherbrown831's picture

i think there is some kind of

i think there is some kind of adressing issue with between the MRL and the ardiuno. Even on Pin D3 only leds 1-7 light and they act erratic. For example if i send a red =255 to led #7 then the third pixel will turn red. If i send red=255 to LED 10 then pixels 1 and 2 light up. I uploaded the log so you can see the array integers that MRL is sending. 

brotherbrown831's picture


I found a thread on the BB8 builders site where someone was talking about the adafruit neopixels are RGB but he was using RGBW that he got from amazon. I also have RGBW LEDs not RGB. I am wondering if the Neopixel service is not setup for these LEDs and that is what is cuasing the erratic behavior.