These portable LED light poles make pretty lights for a dance party - and better yet:
They're portable! Convenient tripod bases keep them standing at attention, and a 10Ah USB battery (like the one you charge your phone with) will power them for about 8 hours.
They're versatile! You can deploy them in a wide open space at Burning Man, in a private event space, or right next to each other in your living room. (Click into these links for videos of them in action.)
They're coordinated! If you put them next to each other, they sync using near-field radio. And they'll even daisy-chain, meaning the furthest ones can be really far apart as long as there are some in the middle to relay the signal.
They're sturdy! I built over 100 of them and have deployed them at parties in all kinds of weather, from hot & dusty windstorms to torrential rain. They've been tossed in a truck, carried around as totems, knocked or blown over, and almost all of 'em are still working. Just don't let people use them like light sabers (lesson learned.)
They're also in progress with lots of things that could be improved. But for now:
- they play patterns from an expanding set of "genetically-driven" combinations
- they stay in sync or deliberately drift from each other in pleasing ways
- they operate internally at a certain BPM - allowing them to sync to music
Each light tube is running custom software on an ESP32 microcontroller. The software is running a generative light program, based on the popular software WLED, that has a simple "DNA" specifying its pattern, color, effects overlay, offset, and so on.
The patterns run on a clock that's synced to a specific BPM and counts out the 4/4 rhythm of most dance music, so they morph and change on individual beats, measures, and phrases. After several beat phrases pass, a pole's DNA is mutated a little, which can cause it to change color, or adopt a new pattern, etc.
On-board radio lets a light pole broadcast its DNA and clock timer; when others hear the signal, they can choose to follow along by updating their own pattern DNA to match it. The method of coordination is pretty simple right now: each pole has an 8-bit ID, and lower-ID poles obey higher-ID poles.
If they're all close enough, they'll soon start doing the same thing as a group and keeping their clock timers in sync. In case they're not close enough, poles also re-broadcast all the signals they receive and obey. This lets them pass along a signal through the group until all of them have found it.
Some randomness and chaos is intentional. Radio isn't 100% reliable, so they sometimes fall out of contact and then re-connect. And in some cases, the poles will deliberately offset their own clock a bit so that they are clearly doing the same thing but not exactly at the same time. Each tube is actually running several copies of the software and smoothly "cross-fading" between them, to avoid any jarring transitions.
The form factor was inspired by Mark Lottor's Hexatron. The color schemes were inspired by the work of Christopher Schardt and many were found on cpt-city. My most recent versions use the excellent WLED codebase and run as a usermod. My older code was written using FastLED and I still use some original patterns that are evolved versions of FastLED examples. The mesh networking is based on Chuck Sommerville's led-swarm, and still follows its theory for radio connection. When I kicked off this project, I used Paul Stoffregen's WS2812Serial for smooth animation, and of course his Teensy CPU made the whole thing possible. Standing on the shoulders of these giants let me create these in about a month, in time to debut at Burning Man 2019 and appear at many parties since!
This is a WLED-based update to my 2019 light tube project, which ran on Teensy + FastLED + nRF24L01 radios.
Most of the changes are in the usermod usermods/Tubes:
- Tubes is installed as an overlay function, which allows it to run WLED "underneath" but completely control the output.
- Its final output is a composition of multiple layers: it starts with WLED's output, then optionally overwrites with its own patterns, then runs a particle effects library on top of that.
- It stores a curated playlist of composite effects. Some are WLED stock FX, others are custom-built. It moves randomly through that playlist.
- At the time of writing, WLED could not correctly fade transitions between 2 FX. Tubes makes up for that by being able to fade between 1 WLED FX and 1 custom overlay pattern, or between 2 custom overlays. As it moves through the playlist, it ensures that it never plays two WLED FX in a row.
- The particle library runs on top of everything (including WLED FX) and introduces a variety of patterns & blit effects.
- If the user changes effects or palettes in the WLED web UI, Tubes will honor that & stop overlaying for a little while. It will eventually time out and revert to full overlay mode.
- Everything runs on a custom clock that is synced to a specific BPM. The BPM can be changed (manually now, automatic eventually) so that the effects perfectly sync to nearby music. WLED FX don't sync yet but could be speed-adjusted.
- An ESP-Now based mesh network is created, so all devices running this usermod stay in sync with each other, without Wi-Fi.
Mesh networking is based on a unidirectional broadcast protocol:
- Every device (node) is assigned a random 12-bit ID. This ID can change at any time, although in practice it only changes upon reboot.
- A node begins with the assumption that it is the only node, and therefore it is the leader, which means it's the one controlling patterns, palettes, and effects.
- As a node operates, it regularly broadcasts its status via ESP-Now, in case other device nodes are nearby. Nodes also continuously listen for ESP-Now broadcasts with node status.
- Status messages are identified by the node's ID. If a node receives a broadcast from a lower ID, it ignores it.
- When a node receives a broadcast from a higher ID, it assumes that other node must be the leader. It syncs its status to the leader's status & stops broadcasting its own status
- When a node receives a broadcast from the same ID, it assumes there's been an ID assignment collision and randomizes its own ID. (This happens sometimes even in a 12-bit space.)
- Nodes are assumed to be unstable; they can move or be turned off (or crash.) Status packets include both a current status and 30+ seconds of future states. All nodes can continue to run in sync even if they don't hear from the leader during this time.
- If a node hasn't heard from the leader in a long time (20 sec or more), it assumes the leader has permanently left. It reverts to being its own leader again until it hears from a new leader with higher ID.
- To help boost the leader's effective range, a following node will occasionally relay the leader's commands using the leader's ID. This helps sync devices that are out of range of the leader, but within range of a follower. The effective range of a single ESP32 device has been measured at hundreds feet; relays allow for an even larger mesh range.
- There's a protocol for explicit control, with commands that can be sent to specific nodes or all nodes. This allows a single master remote to directly control the entire mesh.
- This has been tested on 75+ devices in proximity, but theoretically can expand until it saturates ESPNow bandwidth (hundreds of devices? thousands? not sure)
The Tubes usermod uses several sub-libraries and helper functions:
- beats.h: an 8-bit bpm library that helps the Tubes run patterns at a specific bpm
- node.h: the ESP-Now based mesh network
- particle.h: a particle effects overlay library
- firmware.sh: successful firmware+config mass-autoupdater
- master.h: a remote that overrides & controls all ESP-Now nodes (run from a separate device)
- timer.h: a tiny library to help with timed events
There are several left-over modules that aren't used any more.
- bluetooth.h: a failed initial attempt to sync over BLE (now unused)
- updater.h + update_server.h: a failed attempt to write a peer-to-peer firmware auto-updater (unreliable)
- sound.h: an initial attempt to create some sound-reactive effect overlays
Also, there a few changes to core library files:
- New brighter, more vivid color palettes (palettes.h + wled00/FX_fcn.cpp)
- New button-press code to allow a single button to handle Wi-Fi protection (it's only turned on by explicit button press) and "Power-save" for battery operation (wled00/button.cpp)
- Fleet provisioning for flashing dozens of WLED controllers (wled00/wled_serial.cpp disabled to allow it)
A fast and feature-rich implementation of an ESP8266/ESP32 webserver to control NeoPixel (WS2812B, WS2811, SK6812) LEDs or also SPI based chipsets like the WS2801 and APA102!
Now with new magical sync powers!
- WS2812FX library with more than 100 special effects
- FastLED noise effects and 50 palettes
- Modern UI with color, effect and segment controls
- Segments to set different effects and colors to user defined parts of the LED string
- Settings page - configuration via the network
- Access Point and station mode - automatic failsafe AP
- Up to 10 LED outputs per instance
- Support for RGBW strips
- Up to 250 user presets to save and load colors/effects easily, supports cycling through them.
- Presets can be used to automatically execute API calls
- Nightlight function (gradually dims down)
- Full OTA software updateability (HTTP + ArduinoOTA), password protectable
- Configurable analog clock (Cronixie, 7-segment and EleksTube IPS clock support via usermods)
- Configurable Auto Brightness limit for safe operation
- Filesystem-based config for easier backup of presets and settings
- WLED app for Android and iOS
- JSON and HTTP request APIs
- MQTT
- E1.31, Art-Net, DDP and TPM2.net
- diyHue (Wled is supported by diyHue, including Hue Sync Entertainment under udp. Thanks to Gregory Mallios)
- Hyperion
- UDP realtime
- Alexa voice control (including dimming and color)
- Sync to Philips hue lights
- Adalight (PC ambilight via serial) and TPM2
- Sync color of multiple WLED devices (UDP notifier)
- Infrared remotes (24-key RGB, receiver required)
- Simple timers/schedules (time from NTP, timezones/DST supported)
See the documentation on our official site!
On this page you can find excellent tutorials and tools to help you get your new project up and running!
See here!
Licensed under the MIT license
Credits here!
Join the Discord server to discuss everything about WLED!
Check out the WLED Discourse forum!
You can also send me mails to [email protected], but please, only do so if you want to talk to me privately.
If WLED really brightens up your day, you can
Disclaimer:
If you are prone to photosensitive epilepsy, we recommended you do not use this software.
If you still want to try, don't use strobe, lighting or noise modes or high effect speed settings.
As per the MIT license, I assume no liability for any damage to you or any other person or equipment.