I have an addressable LED strip. I want to turn on green Color onl to all over the strip. I tried the following piece of code. HOwever, the result is not as desired. #define NUM_LEDS 200 #define LED_PIN 2 CRGB leds[NUM_LEDS]; void setup() { FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, N…

Did you update your first post with pictures ? Or did I miss the "RGBW" on the label ? [afbeelding] If you update your first post, then the flow of the discussion gets disturbed. You can not use the FastLED in RGB mode to control RGBW leds. You need a signal for the SK6812 RGBW. I'm afraid that…

How do you power your strip? [image] blackone: for (int i=0; i<=200; i++) That is wrong; indices go from 0 to 199, not 200. Better to use for (int i=0; i<NUM_LEDS; i++)

[image] sterretje: That is wrong; indices go from 0 to 199, not 200. Better to use for (int i=0; i<NUM_LEDS; i++) I used for (int i=0; i<NUM_LEDS; i++), the result was same, so I used 200. I had used <200. HIt's typing mistake in the question.

[image] blackone: want to turn on green Color onl to all over the strip. I tried the following piece of code. there is a fill function in fastled. No need for a for loop #include "FastLED.h" constexpr uint16_t numLeds {200}; constexpr uint16_t ledPin {8}; // you are on another pin .…

@blackone According to the picture it seems that you have RGBW strip rather than RGB. This fully explains why you get three different colors on every three diodes. Added after few minutes: ...Although no .... then there would be white diodes ...

[image] blackone: I used for (int i=0; i<NUM_LEDS; i++), the result was same, so I used 200. I had used <200. HIt's typing mistake in the question. You did not answer the question how you power your strips.

@b707 You are right, it is not a normal ledstrip. The sketch should turn the ledstrip green, see the test Wokwi .

[image] sterretje: How do you power your strip? I have given power both from power source snd arduino. When I do leds[0] = CRGB::Green;, the first led is turned green color. But I need the whole strip to be of green color.

[image] b707: According to the picture it seems that you have RGBW strip rather than RGB. This is the picture of the LED

[image] Koepel: You are right, it is not a normal ledstrip. The sketch should turn the ledstrip green, see the test Wokwi This is the result of the code. It is still not as I expected. There are different colors on each leds.

[image] noiasca: there is a fill function in fastled. No need for a for loop This code also did not give the desired result. The color of the first led is slightly gree, that of second is blue and the third is red, and repeat. [KakaoTalk_20220721_092103433]

How to turn on Only one Color in Addressable LED using FastLED library?

Other Hardware LEDs and Multiplexing

blackone July 21, 2022, 12:05am 10

This is the picture of the LED

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How to turn on Only one Color in Addressable LED using FastLED library?

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