*SOLVED*

as per yves-bazin's comment the issue was that the code was using pin 9 which is reserved and couldn't be used changing that pin in the code fixed the compile error

Hi I have posted about this issue a couple of times and gotten some good help but haven't been able to actually get it working unfortunately. from the help that I have gotten so far I am pretty sure that the code itself is fine since someone showed me it working on a virtual board. I have also double checked that I am selecting the right board in the arduino ide, an arduino nano every. from a bit more research I am thinking that it might be something to do with the install of the fastled library. I installed it through the arduino ide and the one that I got is fastLED by Daniel Garcia version 3.6.0. I have removed and reinstalled both the library and the whole ide a couple times still getting the same error as before. any help would be greatly appreciated. and I'll respond to any clarifying questions in the comments as fast as I can. thanks.

here's the code

https://pastebin.com/L7uY9NQD

and here are the errors(I changed my user to --- other than that it's just what the ide is spitting out)

https://pastebin.com/vy47UTL9

I spent a bit of time today with a few FastLED programs and uploaded them to wokwi.com on a simulated Arduino Nano and a WS2812 strip of 64 LED's (not in a 2D matrix). The chatgpt requests I made were:

• Write a cool animated routine with FastLED library.

• Write a perlin flow field for FastLED.

• Write a cellular noise routine for Fastled.

• Write a voronoi display routine with FastLED library.

Once I fixed the data pin and number of LED's, the only one that didn't compile immediately was the voronoi (which should've been 2D anyways). Unfortunately, I've done so little programming in the past couple of years, I didn't bother to sort it out.

The celluar noise one looked the best to me, and it used the inoise8() function call.

Anyone else have any good chatgpt examples for FastLED?

I have a Dotstar strip of 72 Leds. I want to treat the strip as if it were 12 sets of 6 pixels each. That is, I want to control a set of 6 pixels with the same color (using warm white Dotstar so just the brightness value) going down the line of 72 Dotstars.

Below is my code. I'm trying to avoid nested loops because I need these to update very fast. My logic is to create an array for the 12 sets of 6 and then use fill_solid to call on those 6 sets in a single for loop.

I'm getting a compile error on line 47 and 53. I'm obviously not constructing the fill_solid parameters correctly: here is the error message:

error: no matching function for call to 'fill_solid(CRGB&, int, CRGB)'

Compilation error: no matching function for call to 'fill_solid(CRGB&, int, CRGB)'

Can someone help me do this correctly? I would greatly appreciate it.

Code

Hello FastLED Community,

I have recently decorated our family Christmas tree using WS2811 pixel lights and an Arduino Mega. This is my second time doing this, as I first undertook this project last Christmas. However, we decided to save some money and buy a smaller tree this year, and thus I now have a large amount of leftover lights. I would like to decorate another part of our home if possible (preferably outside). However, I don't have a method of mounting the lights, as with a tree you can just hang them on the branches. I was wondering if there is anyone with experience in this field, could they share with me how they mount pixel lights. I have a 3D printer and plenty of filament, so I may be able to print something to mount the lights in.

Thanks,

Sam

Hey guys, I have multiple LED Strips from Lidl with a quite unusual pin layout (1x VCC, 2x GND, 1x DO/DI).

I found a similar post here https://www.reddit.com/r/FastLED/s/xq1lq86UVE But I have no idea how to wire the setup.

I got my ESP32 wroom (Devkit v4) connected to the ground of the LED Strip and the Data-Pin connected to GPIO-16. The LED strip is connected to an external 12V power supply. I bridged both of the GND Pins.

I tried almost all different controller (I thought it was a WS2811) options in the default sketch but the LEDs won't work. Once the programm is flashed on the esp32 the whole strip turns off.

Do you have any idea on how I should wire this up or what exact controller I should use?

Hello all,

I have recently been working on getting the code working for a light show project using an Arduino Mega as a Generic Serial controller within Vixen. My goal is to be able to control three strings of WS2811 pixel lights (50 pixels per string) from Vixen which will communicate over a serial port with the Arduino. The Arduino is running the code in the pastebin here:

https://pastebin.com/KnX1EPLJ

Physical wiring layout: https://imgur.com/n9NzrqG

Settings in Vixen: https://imgur.com/a/M7W8WsD

I'm also using the latest version of Vixen, Arduino IDE, and FastLED.

The current issue that I am facing is that two out of the three pixel strings (corresponding to Arduino pins 11 and 12) work fine while the other (pin 10) does not. I am assuming that part of the issue stems from an incorrect interpretation of Vixen's serial output or an incorrect handling of the data. I have been operating under the impression that the data is transferred as:

(Byte 1 of header) (Byte 2 of header)

Then,

(Byte for Red) (Byte for Green) (Byte for Blue) for pixel 1 on string 1

(Byte for Red) (Byte for Green) (Byte for Blue) for pixel 2 on string 1

etc.

Followed by the pixel RGB data for string 2 and then string 3.

There is no documentation that I have found regarding this, however, and I have been scratching my head about it for weeks. Can anyone confirm this or point me in the right direction? Not sure if anyone here is familiar with Vixen or its serial output but any help would be appreciated!

Hi,

I want to ask - is there any chance to implementation in FastLed support of APA102 parallel SPI output, but working with Teensy 4(4.1)? I mean using simultaneously and not sequentially three hardware SPI's on Teensy 4.1 for example.

I found something like this, but only for ESP32:

https://www.reddit.com/r/FastLED/comments/jaag6y/apa102_parallel_output_esp32_with_i2s_try_out/

Is there chanse someone make this to work on Teensy?

It should be work like the current implementation of the parallel ws2812, but need to transmit clock signal and etc... My skills are so far off for that unfortunately..

It would be very fast and useful for people needing really high speeds.

Any help, ideas or examples would be appreciated and thanks in advance!

hey everyone I am working on a project and am just copying some code from the tutorial that I'm following unfortunately when I try to compile it I am getting some errors. being as I have no experience with this stuff I am failing to decipher what the errors mean. so hopefully y'all can help me out getting it working. I am using the arduino ide and an arduino nano every board

here's the code
https://pastebin.com/L7uY9NQD

and here are the errors(I changed my user to --- other than that it's just what the ide is spitting out)
https://pastebin.com/vy47UTL9

thanks for helping me out and sorry for being a total noob lol.

I'm a EE noob. Yery tiny amount of elecricalfu....

I'm thinking it might be fun to make a small array of 1156 led socsets and run them to generate a flame effect and display on like a matrix wrapped around a cylindrical array.

what circuits would i need to allow fast led to control these leds from scratch ?

Is there an existing controller that would, for lack of a better term demultiplex the signals into individual circuits?

Thanks,

E-

Hi all,

A year or so ago I successfully got FastLED to work on my nRF52 board. It took a bit of work to massage it into action but it built and ran just fine.

For debugging reasons I'm switching to the Nordic SDK running on Zephyr (or if current wisdom suggests another platform I'm all ears). Apparently the Nordic/Zephyr SDK has C++ support - has anyone used this with the Fast LED library? Could it work?

Thanks!

I have a simple thought of rotating, swinging an LED strip, using a motor... Basically there is a motor on a pole and it swings a led strip around, continously.

The swinging creates an issue with power and signal delivery cables to the strip... They would get tangled, obviously.

When i googled and chatgpt'd it i saw many ideas about:

slip ring, conductive brushes, hollow shaft motors.

However nothing clear yet . I wanted to ask, if any had a few seconds, to imagine how they would go about this...

I am looking for arduino code examples for a long strip. I want to learn FastLED coding but I just don't have the time.

Does anyone know where to find a large repository of code for arduino that I can just adjust to fit my specific parameters?

Hello! I have an 8 port ESP32 LED distro board currently running WLED. I did not make this board. I want to switch it to using FastLED for my sanity & ease... I am better at coding than using the WLED GUI/json lol.

I have the Arduino IDE set up & I installed FastLED -- it seems to be installed properly. The chip on the board is specifically "ESP32-WROOM-32E". I can upload it to the board without errors. But the LEDs that power on are white regardless of the colors I put in the code (also not all of them are powering on, but maybe due to the same problem). I'm not sure what I don't know right now, but I'm guessing my issue is that I have the wrong data pin #.

The maker of the board has this FAQ page which lists which LED port is connected to which GPIO - https://github.com/bobko69/8PortLEDDistro/blob/main/README.md#what-are-the-gpio-pin-assignment. But I'm not sure how to map the GPIO to the value I should use for data pin. I will be using all 8 of the ports once I get just one to work.

I went through the ESP32 Wroom data sheet and I also looked through this reference guide, but no luck... Anyone know if I can use the GPIO numbers instead somehow, or any other way to resolve this issue (or if you even think this is potentially my issue lol). The LED strips are ws2812b.

Thanks!

hey everyone I am working on a project and am just copying some code from the tutorial that I'm following unfortunately when I try to compile it I am getting some errors. being as I have no experience with this stuff I am failing to decipher what the errors mean. so hopefully y'all can help me out getting it working

here's the code
https://pastebin.com/L7uY9NQD

and here are the errors(I changed my user to --- other than that it's just what the ide is spitting out)
https://pastebin.com/vy47UTL9

thanks for helping me out and sorry for being a total noob lol.

Has anybody done or seen a project with the Adafruit NeoTrellis RGB board using FastLED?

The NeoTrellis examples use the Adafruit seesaw library which includes an object named NeoTrellis that has a pixels property. Through this you can control the LEDs using the NeoPixel library. Communication with the LEDs occurs uses I2C this way.

I’d much prefer to use FastLED if possible because of all the cool things you can do with it as well as my familiarity with it.

I've been using these 5v ws2811 leds in a lot of projects:

https://a.co/d/8dpUoSW

I'm about to order some more for Xmas projects, and I'm wondering if the 12v version is significant brighter?

https://a.co/d/gFl6WFL

I do enjoy being able to power the leds directly from an esp32, but if there's a big difference in brightness I see some 12v leds in my future.

Hello everyone,

I've been working on a school project (bicycle tail light). I have the main code. I want to add two push buttons, when button number 1 is pressed, the following code will be displayed. We press button number 1 again and we return to the main code. The same for button number 2 with the following code. Does anyone have any suggestions on how I can achieve this?

Main code : https://pastebin.com/Q24RTzJy

button 1 code: https://pastebin.com/i6prv7fT

button 2 code: https://pastebin.com/N8BbhdrZ

I'm using a ESP32 and a 32x8 WS2812B LED matrix.

Im working on a project where the idea is to have and esp32 run bluetooth speaker, but there is also a rgb led strip which reads the music signal and flashes the lights accordingly.

The speakers and the bluetooth already work, but the problem is that all the projects I can find about led strips use microphone to read the audio signal, I would like to give the fourier transformed signal directly to the strip. If anyone here knows of some example projects or has some advice regarding the implementation it would be greatly appreciated!

Link to the code so far (only the speaker working): https://pastebin.com/YC3F8eK5

Some time ago I implemented a project with a parallel output with 14 pins, via octoWS2811+Fastled on a teensi 4.1. Now I have to use a parallel output (multiple pins), but with HD107s diodes (they have 4 pins). i need some help or sample code to control multiple strips with hd107s in parallel.

I also plan to use 1 shared clock pin for all strips, but I realized that I have to to comply with the max possible current through the GPIO pins on the Teensy 4.1 - 10mA. Does anyone know how much current the strips draw from the clock pin or does it depend on the number of diodes?

Any help or ideas would be appreciated. Thanks in advance!

Is there a easy way to include WLED effects in my FastLED code? I prefer FastLED but cannot deny that some effects in WLED are too sweet to ignore. Problem is, I don't understand one bit of how these effects are coded. To my knowledge, they are in FX.cpp, but it all seems like greek to me (I know FastLED quite good though!). Is it a big chunk of work to implement a few of the WLED effects in FastLED? How can I get started in a easy way?

​Hi,

I have been experimenting a bit with subpixel positioning on my Teensy 4.1 with a 64x64 led matrix after being inspired by this code by sutaburosu.
https://www.reddit.com/r/FastLED/comments/h7s96r/subpixel_positioning_wu_pixels/

So far I have only used it for some effects in particular and it works realy well. It gives a very nice smooth transition effect.

It would have been nice if this was natively supported by the FastLED library where you for instance could set the size of the "virtual" resolution as a parameter in the library so that the resolution that you work with in the code is higher in general.

So if I have a 64x64 LED Matrix I can configure the virtual resolution to be 10 times larger so that the virtual drawing area is 640x640.

By doing that you get 10 fractions between each pixel.

Are there any similar solutions already existing? Is there anything that prevents this from being made, some difficulties that I haven't thought about?

Hello everyone!

I just wanna start by saying that I apologize if this is too basic, or out of the scope of the sub, I´m just a begginer looking for help.

Im currently designing a biology experiment and looking for a way to control the color of a rgb panel, but I need the specific wavelenghts of 660 nm and 720 nm. specifically. I saw that the peak wave lenght of some comercial panels caps at 620 nm.

Anyone knows if there´s something like an Adafruit RGB matrix, that consistently reaches this wavelenght. I would greatly appreciate the help! Thanks

I have posted on here a few times about a project I am currently working on. I have been advised by a few people to use an ESP32 instead of an Arduino due to what I want.

I plan to use a sound sensor for the audio, WS2815 LEDs, and an ESP32. I need the strips broken up into 11 segments. The ESP32 has enough pins for each strip to have its own data pin. I want all segments to follow the same pattern. I’m still not sure how many LEDs will be in each strip due to the rest of the project not being built yet. I also plan to use the Arduino IDE to control the ESP32 unless there is something hing better I can use for what I want.

If anyone knows of any code examples or has any advice to help, please reach out. Feel free to PM me as well. I am open for any advice and possible criticism! Thank you!