some parts to give back

[daduke]

thanks for this awesome project, I'm using the MMU on a Voron 2.4. In the process I came up with a few parts that might be useful for others:

• a 5-way filament hub with an ECAS endpoint to go on the Stealthburner link
• an LED strip to show which lane is currently loading/active/unloading
  link. It uses these LEDs and a few lines of code in sp_mmu_code.cfg:

@@ -606,6 +606,12 @@ gcode:
     {% if params.LANE %}
     _SP_NOTIFY ACTION="extruder_loading" LANE={params.LANE} COMPLETE=0 
     
+      SET_LED LED=mmu_rgb RED=0 GREEN=0 BLUE=0 index=1
+      SET_LED LED=mmu_rgb RED=0 GREEN=0 BLUE=0 index=2
+      SET_LED LED=mmu_rgb RED=0 GREEN=0 BLUE=0 index=3
+      SET_LED LED=mmu_rgb RED=0 GREEN=0 BLUE=0 index=4
+      SET_LED LED=mmu_rgb RED=0 GREEN=1 BLUE=0 index={params.LANE | int +1}
+
       {% if rt.is_filament_in != 1 %} 
 
         {% if guest_lane == 1 %} ## Manual loading of the guest lane
@@ -744,6 +750,12 @@ gcode:
   {% if rt.exit_code == 0 %}
     RESPOND MSG="SP: Unloading Extruder ..."
   
+      SET_LED LED=mmu_rgb RED=0 GREEN=0 BLUE=0 index=1
+      SET_LED LED=mmu_rgb RED=0 GREEN=0 BLUE=0 index=2
+      SET_LED LED=mmu_rgb RED=0 GREEN=0 BLUE=0 index=3
+      SET_LED LED=mmu_rgb RED=0 GREEN=0 BLUE=0 index=4
+      SET_LED LED=mmu_rgb RED=1 GREEN=0 BLUE=0 index={params.LANE | int +1}
+
     {% if params.LANE %}
     _SP_NOTIFY ACTION="extruder_unloading" LANE={params.LANE} COMPLETE=0

[lhndo]

Thanks so much for sharing this! I'm sure people will find this useful.
Glad you found a good use for _SP_NOTIFY. That's the reason I added that hook.

The Pico looks great with the light setup!