Wifi Prusa Light Bar (WLED + NeoPixels)

prusaprinters

<h3>Work In Progress!!</h3>This design is a work in progress.  Here is a list of current issues / todos:<ul><li>After printing, P73 goes low and stays low. WLED interprets this as a new button hold event every few seconds. Causes flickering, setting the same animation as currently playing.<ol><li>Possible Fix: Set the Button Hold → Idle animation preset to be a static non-animated color band.</li><li>Possible Fix: Remove the button hold macro.  Use press and double press to navigate the presets.</li></ol></li><li>After a power cycle, the ESP8266 filesystem becomes corrupt when connecting P73 through a voltage divider to the D3 input.  Measured 1.2V when first turned on (bad).<ol><li>Solved: Moved to D1 and using a reverse diode and 3.3v pullup resistor to convert from 5V.  Measured 3.3V when first turned on (good)</li></ol></li><li>ESP8266 crashes periodically.  Scope says the 5V and P73 lines are noisy during a print job.  <ol><li>Possible Fix: Try adding a 330uf or 1000uF capacitor to each. </li></ol></li><li>Finalize presets file.  <ol><li>TODO: No .json is attached, use appendix for now.</li></ol></li></ul> <h3>Introduction</h3>By inserting custom gcode into PrusaSlicer, we can press a virtual button input to an ESP8266 running WLED.  This gives us the benefits of <a href="https://kno.wled.ge/">WLED</a> (wifi smartphone app and lots of animation options) with very little overhead. A typical print will follow the following animation routine:<ol><li>Button Hold → Idle</li><li>Button Double Press → Heating Up</li><li>Button Press → Auto Bed Leveling</li><li>Button Press → Active Print</li><li>Button Hold → Idle</li></ol>No raspberry pi needed.  If you are running OctoPrint, you can still follow this build.  Do not wire the ESP8266 into your einsy.  Instead, use the <a href="https://plugins.octoprint.org/plugins/wled/">WLED OctoPrint Plugin</a>.<h3>Shopping List</h3><ul><li><a href="https://amzn.to/3HHer6F">WEMOS D1 Mini</a> - ESP8266 Wifi Dev Board</li><li><a href="https://amzn.to/3Od4rnT">Addressable RGB Strip</a> - Check <a href="https://kno.wled.ge/basics/compatible-hardware/">here</a> for compatibility</li><li><a href="https://amzn.to/3NiOv29">DuPont Connectors</a> or <a href="https://amzn.to/3Ogu4US">DuPont Connectors and Crimping tool</a></li><li>Two M3x20 Screws and One M3x8 Screw (check your prusa spare parts bag)</li><li><a href="https://amzn.to/3y8FF2N">3 wire cable</a></li><li>Zip Ties</li><li><a href="https://amzn.to/3OhRU2A">Hot Glue Gun</a></li><li>Double Sided Tape</li></ul>Optional:<ul><li><a href="https://amzn.to/3Ov75VW">Bamboo Sticks</a> - Gives a better finish than a 3d printed support bar.</li><li><a href="https://amzn.to/3n9Fq17">Tactile Button</a> - So you can control the lights without gcode or your phone.</li><li><a href="https://amzn.to/3tTK6vI">Soldering Kit</a></li><li><a href="https://amzn.to/39IbWUW">Heat Shrink Tubing</a></li><li><a href="https://amzn.to/3ycIYWH">Braided Sleeving</a></li><li>Black Spray Paint</li><li>8mm magnets to attach lightbar (can also use glue)</li></ul>We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.<h3>Remix Notes and Assembly</h3>This is a remix of <a href="https://www.printables.com/model/60857-prusa-multi-color-unit-rgb-individually-addressabl">Prusa Multi-Color Unit | RGB Individually Addressable LED Light Bar</a> by Mew.  Go there for additional 3D parts and assembly notes.  Come back here for wiring and WLED setup.Changes from Mew's Version:<ul><li>Light Controller box stl fits in a D1 Mini.</li><li>Added magnetic end caps</li><li>Added support bars (replaces bamboo sticks)</li><li>Wiring for D1 Mini</li><li>Custom G-Code for WLED integration</li></ul><h3>WLED </h3>InstallationInstallation is all done from your browser.  No tools needed.<ol><li>Plug the ESP8266 into your computer </li><li>Visit <a href="https://install.wled.me/">https://install.wled.me/</a></li><li>Click Install and select your com port</li><li>Connect to Wifi and launch settings</li></ol>SettingsAfter connecting to your WLED installation, set the config options:Config > LED Preferences:<ul><li>LED outputs > Pin: 2 (D4)</li><li>LED outputs > Count: 20</li><li>Button pin = 5 (D1)</li><li>Apply preset 1 at boot (Idle Animation)</li></ul>Config > Time & Macros:<ul><li>Button short press Preset = 99 (Next Animation)</li><li>Long Press = 1 (Idle Animation)</li><li>Double Press = 2 (Heating Animation)</li></ul>Optional: If you have a tactile button, you can also setup Button 2’s input and Macros.PresetsTHIS SECTION IS A WORK IN PROGRESS!!! USE PRESETS FROM APPENDIXUsing WLED's file explorer, we can enter all the presets in one go.<ol><li>Change the url to http://yourIPaddress/edit </li><li>Rename the attached presets.json.txt to presets.json</li><li>Upload presets.json file</li><li>Change the URL back and confirm the following presets were added:<ul><li>Preset 99 Next</li><li>Preset 1 Idle</li><li>Preset 2 Heating Up</li><li>Preset 3 Bed Leveling</li><li>Preset 4 Active Print</li></ul></li></ol>Tips: <ul><li>Click 'PC Mode' for a better interface when using from PC.</li><li>Click ‘Peek’ to preview the animations without connecting the light bar.</li><li><a href="https://kno.wled.ge/">Getting started with WLED</a></li></ul>WiringTHIS SECTION IS A WORK IN PROGRESS!!!Now that WLED is configured, you can wire your ESP8266 into the neopixel strip and Prusa.<ul><li>Use J19-7 (PJ3) on the einsy board for the button input to WLED. </li><li>Use a diode and 10k resistor to drop the 5 volts to below 3.6 volts for the ESP8266.</li><li>Add a 330uF to 1000uF capacitor to the 3.3 volt rail.</li></ul>THIS SECTION IS A WORK IN PROGRESS!!!<figure class="image"><img src="https://media.printables.com/media/prints/230354/rich_content/446f0db0-0705-45c7-8083-d3183f6ccc45/image.png#%7B%22uuid%22%3A%22617a0980-aab1-46b6-a753-12de052aa3b3%22%2C%22w%22%3A1675%2C%22h%22%3A816%7D"></figure><h3>PrusaSlicer Settings</h3>Do not just copy and paste these.  Compare them to your own Custom G-code in your PrusaSlicer > Printer Settings.  Copy only the animation parts for toggling the P73 without erasing your existing G-Code.When done, save your new printer profile in PrusaSlicer.Start G-code:<pre><code class="language-plaintext">M862.3 P "[printer_model]" ; printer model check M862.1 P[nozzle_diameter] ; nozzle diameter check M115 U3.11.0 ; tell printer latest fw version G90 ; use absolute coordinates M83 ; extruder relative mode M42 P73 S255 ; Heating Up Animation G4 P500 M42 P73 S0 G4 P150 M42 P73 S255 G4 P150 M42 P73 S0 G4 P150 M42 P73 S255 M104 S[first_layer_temperature] ; set extruder temp M140 S[first_layer_bed_temperature] ; set bed temp M190 S[first_layer_bed_temperature] ; wait for bed temp M109 S[first_layer_temperature] ; wait for extruder temp M42 P73 S255 ; Auto Bed Leveling Animation G4 P500 M42 P73 S0 G4 P150 M42 P73 S255 G28 W ; home all without mesh bed level G80 ; mesh bed leveling M42 P73 S255 ; Active Print Animation G4 P500 M42 P73 S0 G4 P150 M42 P73 S255 G1 Z0.2 F720 G1 Y-3 F1000 ; go outside print area G92 E0 G1 X60 E9 F1000 ; intro line G1 X100 E12.5 F1000 ; intro line G92 E0 M221 S{if layer_height<0.075}100{else}95{endif} ; Don't change E values below. Excessive value can damage the printer. {if print_settings_id=~/.*(DETAIL @MK3|QUALITY @MK3).*/}M907 E430 ; set extruder motor current{endif} {if print_settings_id=~/.*(SPEED @MK3|DRAFT @MK3).*/}M907 E538 ; set extruder motor current{endif} </code></pre>End G-code:<pre><code class="language-plaintext">{if max_layer_z < max_print_height}G1 Z{z_offset+min(max_layer_z+1, max_print_height)} F720 ; Move print head up{endif} G1 X0 Y200 F3600 ; park {if max_layer_z < max_print_height}G1 Z{z_offset+min(max_layer_z+49, max_print_height)} F720 ; Move print head further up{endif} G4 ; wait M221 S100 ; reset flow M900 K0 ; reset LA {if print_settings_id=~/.*(DETAIL @MK3|QUALITY @MK3|@0.25 nozzle MK3).*/}M907 E538 ; reset extruder motor current{endif} M104 S0 ; turn off temperature M140 S0 ; turn off heatbed M107 ; turn off fan M84 ; disable motors M42 P73 S255 ; Idle Animation G4 P500 M42 P73 S0 G4 P1000 M42 P73 S255 </code></pre><h3>Appendix: References</h3><ul><li><a href="https://blog.prusa3d.com/how-to-create-beautiful-3d-print-timelapse-videos_29743/&_gac=1.115873012.1655477639.Cj0KCQjwzLCVBhD3ARIsAPKYTcQ54c2qwARcvMDKiD2UkZp1hV2ZENW4LK9KNt6VzY9P_PFLrg_ntPYaAjdnEALw_wcB">How to create beautiful 3D print timelapse videos</a> Button controls from gcode</li><li><a href="https://plugins.octoprint.org/plugins/wled/">Octoprint WLED Plugin</a> Octoprint raspberry pi to WLED interface</li><li><a href="https://www.printables.com/model/60857-prusa-multi-color-unit-rgb-individually-addressabl">Prusa Smart Lights</a> Runs on an Arduino Nano and has ~16 animations to choose from. All programmable from gcode. I have this installed on one of my printers and it works great!!</li><li><a href="https://randomnerdtutorials.com/esp8266-pinout-reference-gpios/">ESP8266 Pin Selection Guide</a></li><li><a href="https://reprap.org/wiki/EinsyRambo_development">Einsy Rambo Pin List</a></li><li><a href="https://next-hack.com/index.php/2017/09/15/how-to-interface-a-5v-output-to-a-3-3v-input/">5V to 3.3V logic level translation</a> The Einsy outputs 5V and the WLED input is not really 5V tolerant.</li><li><a href="https://github.com/Aircoookie/WLED/wiki/Settings">WLED Button Timings</a></li><li><a href="https://www.youtube.com/watch?v=wf_msvWv1jk">How to properly power the ESP8266 modules</a> - ESP8266 Power and Crashing</li></ul><h3>Appendix: Annotated Gcode Logic</h3>WLED is expecting button presses with specific timings.<ul><li>A short press (less than 700ms) will go to the next preset</li><li>A long press (greater than 700ms) will go to the idle animation</li><li>A double press (two short presses within 700ms) will go to the heating animation</li></ul>Short Press<pre><code class="language-plaintext">M42 P73 S255 //clear previous G4 P500 M42 P73 S0 //short press G4 P150 M42 P73 S255 //clear press</code></pre>Long Press<pre><code class="language-plaintext">M42 P73 S255 //clear previous G4 P500 M42 P73 S0 //long press // no need to wait to clear</code></pre>Double Press<pre><code class="language-plaintext">M42 P73 S255 //clear previous G4 P500 M42 P73 S0 //short press G4 P150 M42 P73 S255 G4 P150 M42 P73 S0 //double press G4 P150 M42 P73 S255 //clear press</code></pre><h3> Appendix: Animation Presets</h3>This is for reference only.  Uploading the presets.json will set these for you.  Or make your own :D the app is very easy to use with lots of youtube tutorials.<ol><li>Click Create Preset</li><li>Unclick Use current state</li><li>Copy paste one of the following API commands</li><li>Save to the corresponding ID number</li></ol>Preset 1 IdleThis needs to be a static non-animation.  Holding the button after the print can re-trigger the animation to start over and cause flickering of a moving animation.<pre><code class="language-plaintext">{"on":true,"bri":255,"transition":7,"mainseg":0,"seg":[{"id":0,"start":0,"stop":20,"grp":1,"spc":0,"of":0,"on":true,"frz":false,"bri":255,"cct":127,"col":[[255,224,160],[0,0,0],[0,0,0]],"fx":115,"sx":187,"ix":0,"pal":0,"sel":true,"rev":false,"mi":false},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0}]}</code></pre>Preset 2 Heating<pre><code class="language-plaintext">{"on":true,"bri":128,"transition":7,"mainseg":0,"seg":[{"id":0,"start":0,"stop":20,"grp":1,"spc":0,"of":0,"on":true,"frz":false,"bri":255,"cct":127,"col":[[255,4,0],[255,180,82],[0,0,0]],"fx":2,"sx":128,"ix":128,"pal":0,"sel":true,"rev":false,"mi":false},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0}]}</code></pre>Preset 3 Bed Leveling<pre><code class="language-plaintext">{"on":true,"bri":128,"transition":7,"mainseg":0,"seg":[{"id":0,"start":0,"stop":20,"grp":1,"spc":0,"of":0,"on":true,"frz":false,"bri":255,"cct":127,"col":[[0,0,255],[255,180,82],[0,0,0]],"fx":27,"sx":128,"ix":128,"pal":0,"sel":true,"rev":false,"mi":false},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0}]}</code></pre>Preset 4 Printing<pre><code class="language-plaintext">{"on":true,"bri":128,"transition":7,"mainseg":0,"seg":[{"id":0,"start":0,"stop":20,"grp":1,"spc":0,"of":0,"on":true,"frz":false,"bri":255,"cct":127,"col":[[179,0,255],[0,26,255],[0,0,0]],"fx":9,"sx":128,"ix":128,"pal":0,"sel":true,"rev":false,"mi":false},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0}]}</code></pre>Preset 99 Next PresetPreset selection loop must start at 1 so WLED can track the currently selected preset and always increment to the next preset. <a href="https://kno.wled.ge/interfaces/http-api/#presets">More info</a><pre><code class="language-plaintext">win&P1=1&P2=5PL=~</code></pre>

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