I have problems controlling a WS2812B led strip with the ESP32 Dev Module board. I used the sketch below (the simple example)
Arduino board: ESP32 Dev Module (240MHz)
Arduino IDE version: 1.8.12
Sketch used:
// NeoPixel Ring simple sketch (c) 2013 Shae Erisson
// Released under the GPLv3 license to match the rest of the
// Adafruit NeoPixel library
include
// Which pin on the Arduino is connected to the NeoPixels?
define PIN 5 // On Trinket or Gemma, suggest changing this to 1
// How many NeoPixels are attached to the Arduino?
define NUMPIXELS 10 // Popular NeoPixel ring size
// When setting up the NeoPixel library, we tell it how many pixels,
// and which pin to use to send signals. Note that for older NeoPixel
// strips you might need to change the third parameter -- see the
// strandtest example for more information on possible values.
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
define DELAYVAL 500 // Time (in milliseconds) to pause between pixels
void loop() {
pixels.clear(); // Set all pixel colors to 'off'
// The first NeoPixel in a strand is #0, second is 1, all the way up
// to the count of pixels minus one.
for(int i=0; i<NUMPIXELS; i++) { // For each pixel...
// pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
// Here we're using a moderately bright green color:
pixels.setPixelColor(i, pixels.Color(0, 150, 0));
pixels.show(); // Send the updated pixel colors to the hardware.
delay(DELAYVAL); // Pause before next pass through loop
}
}
Once uploaded the code above, the leds are white not green and the for loop doesn't happen.
Watching with a logic analyzer I saw this:
The timings are wrong, aren't they?
Uploading the same sketch in an Arduino Uno Official board all works fine (naturally using the same leds).
How can I make it works? Thank you.
ladyada
commented
4 years ago
I have problems controlling a WS2812B led strip with the ESP32 Dev Module board. I used the sketch below (the simple example)
Arduino board: ESP32 Dev Module (240MHz)
Arduino IDE version: 1.8.12
Sketch used:
include
// Which pin on the Arduino is connected to the NeoPixels?
define PIN 5 // On Trinket or Gemma, suggest changing this to 1
// How many NeoPixels are attached to the Arduino?
define NUMPIXELS 10 // Popular NeoPixel ring size
// When setting up the NeoPixel library, we tell it how many pixels, // and which pin to use to send signals. Note that for older NeoPixel // strips you might need to change the third parameter -- see the // strandtest example for more information on possible values. Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
define DELAYVAL 500 // Time (in milliseconds) to pause between pixels
void setup() { pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED) }
void loop() { pixels.clear(); // Set all pixel colors to 'off'
// The first NeoPixel in a strand is #0, second is 1, all the way up // to the count of pixels minus one. for(int i=0; i<NUMPIXELS; i++) { // For each pixel...
} }