1- to exclude electrical (mostly powering issue), you can keep same configuration (send 2 universes from MM and keep same setup in arduino patch) but put only 170 leds on the output. Does it change anything to fluidity of first 170 leds ?
That doesn't work, the sketch attempt for univers 7 and if i only patch 170 leds, MM doesn't send U7.
I try to patch two fixture, one 170 leds on U6 and one 116 leds on U7 and it's lagging even if the second fixture is black (so it's not a problem of powering)
2- to exclude Arduino patch issue (and then point to network issue), you can try to use the same arduino patch than on other teensies (only one input universe) but continue sending 2 universes from MM. Does it help ?
It's already done. I'v got 6x 170 leds devices on univers 0 to 5 which works perfectly together. To use my 286 leds work for the show, i change the sketch for a 170 led_num.
Another strange thing with two devices 170leds:U6 & 116 leds:U7
I use siren effect. When the repeat parameter is low, its lagging. When it's high, no lag but if i put to zero the luminosity of the second fixture, it's lagging.