ESP8266+Rot Encoder results in Neopixel not displaying

Nick100 · March 7, 2022, 12:40am

Hi All
I recently purchased a Node MCU ESP8266 " NodeMCU board ESP8266 WiFi module CP2102 ESP-12E Lua WiFi [LB-LR0128]" from little Bird (in Aus) . If I program it with a blink sketch or similar it will drive 40 Neopixel etc. If however I load a sketch that includes a Rotary Encoder to add more control the Neopixel's will not light.I have changed the Rot Enc but it made no difference.I have included 2 Sketches below and neither of them will light the Neopixel`Any assistance would be appreciated
Cheers
Nick

SKETCH No1
'// NeoPixel Shields | Adafruit NeoPixel Überguide | Adafruit Learning System
// Rotary Encoder Tutorial with Arduino Code - YouTube
// #19 How to use a Rotary Encoder with an Interrupt routine on your Arduino - YouTube
// https://hifiduino.files.wordpress.com/2010/10/rotenc.jpg
#include <Adafruit_NeoPixel.h> // Include the NeoPixel Library
#ifdef AVR
#include <avr/power.h>
#endif
#define PIN 14
Adafruit_NeoPixel strip = Adafruit_NeoPixel(40, 14, NEO_GRB + NEO_KHZ800);
// Create a NeoPixel Strip (130 Pixels, Connected to Pin 14)
int lightR = 0; int lightG = 0; int lightB = 0;
int flicker;

#define BUTTON_PIN 4 // Digital IO pin connected to the button. This will be
// driven with a pull-up resistor so the switch should
// pull the pin to ground momentarily. On a high -> low
// transition the button press logic will execute.

// the number of the pushbutton pin
const int buttonPin = 4;

// Used for generating interrupts using CLK signal
const int PinA = 12; //dt

// Used for reading DT signal
const int PinB = 13; //clk

// Keep track of last rotary value
int lastCount = 0;

// Updated by the ISR (Interrupt Service Routine)
volatile int virtualPosition = 365;

int pos = 0;

bool oldState = HIGH;
int showType = 0;

// ------------------------------------------------------------------
// INTERRUPT INTERRUPT INTERRUPT INTERRUPT INTERRUPT
// ------------------------------------------------------------------
void isr () {
static unsigned long lastInterruptTime = 0;
unsigned long interruptTime = millis();

// If interrupts come faster than 5ms, assume it's a bounce and ignore
if (interruptTime - lastInterruptTime > 20) {
if (digitalRead(PinB) == LOW)
{
virtualPosition-- ; // Could be -5 or -10
}
else {
virtualPosition++ ; // Could be +5 or +10
}

// Keep track of when we were here last (no more than every 5ms)
lastInterruptTime = interruptTime;

}
}

// ------------------------------------------------------------------
// SETUP SETUP SETUP SETUP SETUP SETUP SETUP
// ------------------------------------------------------------------
void setup() {
pinMode(BUTTON_PIN, INPUT_PULLUP);

// Just whilst we debug, view output on serial monitor
Serial.begin(9600);

// Rotary pulses are INPUTs
pinMode(PinA, INPUT);
pinMode(PinB, INPUT);

// Attach the routine to service the interrupts
attachInterrupt(digitalPinToInterrupt(PinA), isr, LOW);

// Ready to go!
Serial.println("Start");
strip.begin();
strip.setBrightness(120);
}

boolean checkPos(){
// If the current rotary switch position has changed then update everything
if (virtualPosition != lastCount) {

// Write out to serial monitor the value and direction
// Serial.println(virtualPosition);

// Keep track of this new value
lastCount = virtualPosition ;

pos = abs(virtualPosition % 36);

Serial.println(pos);
return true;

}
return false;
}

// ------------------------------------------------------------------
// MAIN LOOP MAIN LOOP MAIN LOOP MAIN LOOP MAIN LOOP
// ------------------------------------------------------------------

void loop() {

// Get current button state.
bool newState = digitalRead(BUTTON_PIN);

// Check if state changed from high to low (button press).
if (newState == LOW && oldState == HIGH) {
// Short delay to debounce button.
delay(20);
// Check if button is still low after debounce.
newState = digitalRead(BUTTON_PIN);
if (newState == LOW) {
showType++;
if (showType > 1)
showType=0;
}
}

// Set the last button state to the old state.
oldState = newState;

if (showType == 0) {
for (int i = 0; i < strip.numPixels(); i++)
{
strip.setPixelColor(i, 0, 0, 0);
}
// Set the NeoPixel to a certain RGB Value
strip.show(); // Show the NeoPixel Color
}
if (showType == 1) {

checkPos();

switch(pos){
case 0:
flicker = random(100,200);
lightR = 250-flicker; lightG = lightR-40-flicker; lightB = 40-flicker;
if(lightG<0) lightG=0; if(lightR<0) lightR=0; if(lightB<0) lightB=0;
delay(random(100,150));
break;
case 1:
colorWipe(strip.Color(148, 0, 211), 50);
colorWipe(strip.Color(75, 0, 130), 50);
colorWipe(strip.Color(0, 0, 255), 50);
colorWipe(strip.Color(0, 255, 0), 50);
colorWipe(strip.Color(255, 255, 0), 50);
colorWipe(strip.Color(255, 127, 0), 50);
colorWipe(strip.Color(255, 0, 0), 50);
break;
case 2:
theaterChase(strip.Color(255, 0, 0), 50);
theaterChase(strip.Color(255, 255, 0), 50);
theaterChase(strip.Color(0, 255, 0), 50);
theaterChase(strip.Color(0, 255, 255), 50);
theaterChase(strip.Color(0, 0, 255), 50);
break;
case 3: theaterChaseRainbow(50); break;
case 4: rainbow(20); break;
case 5: rainbowCycle(20); break;
case 6: lightR = 255; lightG = 0; lightB = 0; break;
case 7: lightR = 255; lightG = 0; lightB = 51; break;
case 8: lightR = 255; lightG = 0; lightB = 102; break;
case 9: lightR = 255; lightG = 0; lightB = 153; break;
case 10: lightR = 255; lightG = 0; lightB = 204; break;
case 11: lightR = 255; lightG = 0; lightB = 255; break;
case 12: lightR = 204; lightG = 0; lightB = 255; break;
case 13: lightR = 153; lightG = 0; lightB = 255; break;
case 14: lightR = 102; lightG = 0; lightB = 255; break;
case 15: lightR = 51; lightG = 0; lightB = 255; break;
case 16: lightR = 0; lightG = 0; lightB = 255; break;
case 17: lightR = 0; lightG = 51; lightB = 255; break;
case 18: lightR = 0; lightG = 102; lightB = 255; break;
case 19: lightR = 0; lightG = 153; lightB = 255; break;
case 20: lightR = 0; lightG = 204; lightB = 255; break;
case 21: lightR = 0; lightG = 255; lightB = 255; break;
case 22: lightR = 0; lightG = 255; lightB = 204; break;
case 23: lightR = 0; lightG = 255; lightB = 153; break;
case 24: lightR = 0; lightG = 255; lightB = 102; break;
case 25: lightR = 0; lightG = 255; lightB = 51; break;
case 26: lightR = 0; lightG = 255; lightB = 0; break;
case 27: lightR = 51; lightG = 255; lightB = 0; break;
case 28: lightR = 102; lightG = 255; lightB = 0; break;
case 29: lightR = 153; lightG = 255; lightB = 0; break;
case 30: lightR = 204; lightG = 255; lightB = 0; break;
case 31: lightR = 255; lightG = 255; lightB = 0; break;
case 32: lightR = 255; lightG = 204; lightB = 0; break;
case 33: lightR = 255; lightG = 153; lightB = 0; break;
case 34: lightR = 255; lightG = 102; lightB = 0; break;
case 35: lightR = 255; lightG = 51; lightB = 0; break;
case 36: lightR = 255; lightG = 0; lightB = 0; break;
default: lightR = 0; lightG = 0; lightB = 0;
}

//strip.Color(lightR, lightG, lightB);
for (int i = 0; i < strip.numPixels(); i++)
{
strip.setPixelColor(i, lightR, lightG, lightB);
}
// Set the NeoPixel to a certain RGB Value
strip.show(); // Show the NeoPixel Color

} else {
for (int i = 0; i < strip.numPixels(); i++)
{
strip.setPixelColor(i, 0, 0, 0);
}
// Set the NeoPixel to a certain RGB Value
strip.show(); // Show the NeoPixel Color
}
}

// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
for(uint16_t i=0; i<strip.numPixels(); i++) {
strip.setPixelColor(i, c);
strip.show();
if(checkPos()){break;}
if(showType == 0){break;}
delay(wait);

}
}

void rainbow(uint8_t wait) {
uint16_t i, j;

for(j=0; j<256; j++) {
for(i=0; i<strip.numPixels(); i++) {
strip.setPixelColor(i, Wheel((i+j) & 255));
}
strip.show();
delay(wait);
if(checkPos()){break;}
if(showType == 0){break;}

}
}

// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
uint16_t i, j;

for(j=0; j<256; j++) { // 5 cycles of all colors on wheel
for(i=0; i< strip.numPixels(); i++) {
strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
}
strip.show();
delay(wait);
if(checkPos()){break;}
if(showType == 0){break;}
}
}

//Theatre-style crawling lights.
void theaterChase(uint32_t c, uint8_t wait) {
boolean quit = false;
for (int q=0; q < 3; q++) {
for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
strip.setPixelColor(i+q, c); //turn every third pixel on
}
strip.show();
if(checkPos()){quit = true; break;}
delay(wait);
for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
strip.setPixelColor(i+q, 0); //turn every third pixel off
}
if(checkPos()){break;}
}
}

//Theatre-style crawling lights with rainbow effect
void theaterChaseRainbow(uint8_t wait) {
boolean quit = false;
for (int j=0; j < 256; j++) { // cycle all 256 colors in the wheel
for (int q=0; q < 3; q++) {
for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
strip.setPixelColor(i+q, Wheel( (i+j) % 255)); //turn every third pixel on
}
strip.show();
if(checkPos()){quit = true; break;}

  delay(wait);
  for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
    strip.setPixelColor(i+q, 0);        //turn every third pixel off
  }
  if(checkPos()){break;}
}
  if(checkPos()){break;}

}
}

// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
WheelPos = 255 - WheelPos;
if(WheelPos < 85) {
return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
}
if(WheelPos < 170) {
WheelPos -= 85;
return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
}
WheelPos -= 170;
return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}'

SKETCH No2
Next

'#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>
#endif
#define PIN 14
#define NUM_LEDS 40
#define pixelcolor ( )
// Parameter 1 = number of pixels in strip
// Parameter 2 = pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
//Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, PIN, NEO_GRB + NEO_KHZ800);

Adafruit_NeoPixel strip = Adafruit_NeoPixel(24, 14, NEO_GRB + NEO_KHZ800);


int R = 0; int G = 0; int B = 0;
int OldLamp;


#define BUTTON_PIN 4


const int buttonPin = 4;
const int PinA = 12;
const int PinB = 13;

int lastCount = 0;


volatile int virtualPosition = 365;


int pos = 0;


bool oldState = HIGH;
int showType = 0;




void time () {
 static unsigned long lastInterruptTime = 0;
 unsigned long interruptTime = millis();


 if (interruptTime - lastInterruptTime > 20) {
  if (digitalRead(PinB) == LOW)
{
 virtualPosition-- ;
}
 else {
 virtualPosition++ ;
}


 lastInterruptTime = interruptTime;
}
}




void setup(){
 pinMode(BUTTON_PIN, INPUT_PULLUP);



 Serial.begin(9600);


 pinMode(PinA, INPUT);
 pinMode(PinB, INPUT);


 attachInterrupt(digitalPinToInterrupt(PinA), time, LOW);


 Serial.println("Start");
strip.begin();
 strip.setBrightness(120);
}




boolean checkPos(){


if (virtualPosition != lastCount) {


 lastCount = virtualPosition ;

 pos = abs(virtualPosition % 36);


 Serial.println(pos);
 return true;
}
 return false;
}




void loop() {


 bool newState = digitalRead(BUTTON_PIN);


if (newState == LOW && oldState == HIGH) {
 delay(20);
 newState = digitalRead(BUTTON_PIN);
 if (newState == LOW) {
 showType++;
 if (showType > 1)
 showType=0;
}
}


 oldState = newState;

if (showType == 0) {
for (int i = 0; i < strip.numPixels(); i++)
{
 strip.setPixelColor(i, 0, 0, 0);
}
 strip.show();
}
if (showType == 1) {

 checkPos();

 switch(pos){

 case 0:
 OldLamp = random(100,200);
 R = 250-OldLamp; G = R-40-OldLamp; B = 40-OldLamp;
 if(G<0) G=0; if(R<0) R=0; if(B<0) B=0;
 delay(random(100,150));
 break;
 case 6: R = 255; G = 0; B = 0;break;
 case 7: R = 255; G = 0; B = 51; break;
 case 8: R = 255; G = 0; B = 102;break;
 case 9: R = 255; G = 0; B = 153;break;
 case 10: R = 255; G = 0;B = 204;break;
 case 11: R = 255; G = 0;B = 255;break;
 case 12: R = 204; G = 0; B = 255;break;
 case 13: R = 153; G = 0; B = 255;break;
 case 14: R = 102; G = 0; B = 255;break;
 case 15: R = 51;G = 0; B = 255;break;
 case 16: R = 0; G = 0; B = 255;break;
 case 17: R = 0; G = 51;B = 255;break;
 case 18: R = 0; G = 102; B = 255;break;
 case 19: R = 0; G = 153; B = 255;break;
 case 20: R = 0; G = 204; B = 255;break;
 case 21: R = 0; G = 255; B = 255;break;
 case 22: R = 0; G = 255; B = 204;break;
 case 23: R = 0; G = 255; B = 153;break;
 case 24: R = 0; G = 255; B = 102;break;
 case 25: R = 0; G = 255; B = 511;break;
 case 26: R = 0; G = 255; B = 0;break;
 case 27: R = 51; G = 255; B = 0;break;
 case 28: R = 102; G = 255; B = 0;break;
 case 29: R = 153; G = 255; B = 0;break;
 case 30: R = 204; G = 255; B = 0;break;
 case 31: R = 255; G = 255; B = 0;break;
 case 32: R = 255; G = 204; B = 0;break;
 case 33: R = 255; G = 153; B = 0;break;
 case 34: R = 255; G = 102; B = 0;break;
 case 35: R = 255; G = 51; B = 0;break;
 case 36: R = 255; G = 0; B = 0;break;
 default: R = 0; G = 0; B = 0;
}
{
 for (int i = 0; i < strip.numPixels(); i++)
{
 strip.setPixelColor(i, R, G, B);
}
 strip.show();
}
} else {
 for (int i = 0; i < strip.numPixels(); i++)
{
//strip.setPixelColor(i, 0, 0, 0);
}
{
 strip.show();
}
}}'

gilshultz · March 7, 2022, 2:24am

Why not clean up the post, you have the code pasted in then it follows uploaded properly. Also a schematic, not a frizzy picture would help.

Nick100 · March 7, 2022, 2:49am

I'll repost but I did use the code tags but something went wrong

Nick100 · March 7, 2022, 2:54am

Sketch 1

// https://learn.adafruit.com/adafruit-neopixel-uberguide/neopixel-shields?view=all#basic-connections
// https://www.youtube.com/watch?v=HQuLZHsGZdI
// https://www.youtube.com/watch?v=J9cDEef0IbQ&t=129s
// https://hifiduino.files.wordpress.com/2010/10/rotenc.jpg
#include <Adafruit_NeoPixel.h>  // Include the NeoPixel Library
#ifdef __AVR__
  #include <avr/power.h>
#endif
#define PIN 14
Adafruit_NeoPixel strip = Adafruit_NeoPixel(40, 14, NEO_GRB + NEO_KHZ800);
// Create a NeoPixel Strip (130 Pixels, Connected to Pin 14)
int lightR = 0; int lightG = 0; int lightB = 0; 
int flicker;

#define BUTTON_PIN   4    // Digital IO pin connected to the button.  This will be
                          // driven with a pull-up resistor so the switch should
                          // pull the pin to ground momentarily.  On a high -> low
                          // transition the button press logic will execute.

// the number of the pushbutton pin
const int buttonPin = 4;

// Used for generating interrupts using CLK signal
const int PinA = 12; //dt

// Used for reading DT signal
const int PinB = 13;  //clk

// Keep track of last rotary value
int lastCount = 0;

// Updated by the ISR (Interrupt Service Routine)
volatile int virtualPosition = 365;

int pos = 0;


bool oldState = HIGH;
int showType = 0;

// ------------------------------------------------------------------
// INTERRUPT     INTERRUPT     INTERRUPT     INTERRUPT     INTERRUPT 
// ------------------------------------------------------------------
void isr ()  {
  static unsigned long lastInterruptTime = 0;
  unsigned long interruptTime = millis();

  // If interrupts come faster than 5ms, assume it's a bounce and ignore
  if (interruptTime - lastInterruptTime > 20) {
    if (digitalRead(PinB) == LOW)
    {
      virtualPosition-- ; // Could be -5 or -10
    }
    else {
      virtualPosition++ ; // Could be +5 or +10
    }

    // Keep track of when we were here last (no more than every 5ms)
    lastInterruptTime = interruptTime;
  }
}

// ------------------------------------------------------------------
// SETUP    SETUP    SETUP    SETUP    SETUP    SETUP    SETUP    
// ------------------------------------------------------------------
void setup() {  
  pinMode(BUTTON_PIN, INPUT_PULLUP);

  // Just whilst we debug, view output on serial monitor
  Serial.begin(9600);

  // Rotary pulses are INPUTs
  pinMode(PinA, INPUT);
  pinMode(PinB, INPUT);

  // Attach the routine to service the interrupts
  attachInterrupt(digitalPinToInterrupt(PinA), isr, LOW);

  // Ready to go!
  Serial.println("Start");
  strip.begin();
    strip.setBrightness(120);
}


boolean checkPos(){
  // If the current rotary switch position has changed then update everything
  if (virtualPosition != lastCount) {
    
    // Write out to serial monitor the value and direction
    // Serial.println(virtualPosition);

    // Keep track of this new value
    lastCount = virtualPosition ;
  
    pos = abs(virtualPosition % 36);

    Serial.println(pos);
    return true;
  }
  return false;
}


// ------------------------------------------------------------------
// MAIN LOOP     MAIN LOOP     MAIN LOOP     MAIN LOOP     MAIN LOOP
// ------------------------------------------------------------------


void loop() {

  // Get current button state.
  bool newState = digitalRead(BUTTON_PIN);

  // Check if state changed from high to low (button press).
  if (newState == LOW && oldState == HIGH) {
    // Short delay to debounce button.
    delay(20);
    // Check if button is still low after debounce.
    newState = digitalRead(BUTTON_PIN);
    if (newState == LOW) {
      showType++;
      if (showType > 1)
        showType=0;
    }
  }

  // Set the last button state to the old state.
  oldState = newState;
  
 if (showType == 0) {
  for (int i = 0; i < strip.numPixels(); i++)
  {
    strip.setPixelColor(i, 0, 0, 0);
  }
  // Set the NeoPixel to a certain RGB Value
  strip.show();  // Show the NeoPixel Color
}
if (showType == 1) {
  
  checkPos();
  
  switch(pos){
    case 0: 
    flicker = random(100,200);
    lightR = 250-flicker; lightG = lightR-40-flicker; lightB = 40-flicker; 
    if(lightG<0) lightG=0; if(lightR<0) lightR=0; if(lightB<0) lightB=0;
    delay(random(100,150));
    break;
    case 1:   
    colorWipe(strip.Color(148, 0, 211), 50);
    colorWipe(strip.Color(75, 0, 130), 50);
    colorWipe(strip.Color(0, 0, 255), 50); 
    colorWipe(strip.Color(0, 255, 0), 50);
    colorWipe(strip.Color(255, 255, 0), 50);
    colorWipe(strip.Color(255, 127, 0), 50); 
    colorWipe(strip.Color(255, 0, 0), 50);
    break;
    case 2:
    theaterChase(strip.Color(255, 0, 0), 50);
    theaterChase(strip.Color(255, 255, 0), 50); 
    theaterChase(strip.Color(0, 255, 0), 50);
    theaterChase(strip.Color(0, 255, 255), 50);
    theaterChase(strip.Color(0, 0, 255), 50); 
    break;
    case 3: theaterChaseRainbow(50); break;
    case 4: rainbow(20); break;
    case 5: rainbowCycle(20); break;
    case 6: lightR = 255; lightG = 0; lightB = 0; break;
    case 7: lightR = 255; lightG = 0; lightB = 51; break;
    case 8: lightR = 255; lightG = 0; lightB = 102; break;    
    case 9: lightR = 255; lightG = 0; lightB = 153; break;
    case 10: lightR = 255; lightG = 0; lightB = 204; break;
    case 11: lightR = 255; lightG = 0; lightB = 255; break;    
    case 12: lightR = 204; lightG = 0; lightB = 255; break;
    case 13: lightR = 153; lightG = 0; lightB = 255; break;    
    case 14: lightR = 102; lightG = 0; lightB = 255; break;
    case 15: lightR = 51; lightG = 0; lightB = 255; break;
    case 16: lightR = 0; lightG = 0; lightB = 255; break;    
    case 17: lightR = 0; lightG = 51; lightB = 255; break;
    case 18: lightR = 0; lightG = 102; lightB = 255; break;
    case 19: lightR = 0; lightG = 153; lightB = 255; break;    
    case 20: lightR = 0; lightG = 204; lightB = 255; break;
    case 21: lightR = 0; lightG = 255; lightB = 255; break;    
    case 22: lightR = 0; lightG = 255; lightB = 204; break;
    case 23: lightR = 0; lightG = 255; lightB = 153; break;
    case 24: lightR = 0; lightG = 255; lightB = 102; break;
    case 25: lightR = 0; lightG = 255; lightB = 51; break;    
    case 26: lightR = 0; lightG = 255; lightB = 0; break;    
    case 27: lightR = 51; lightG = 255; lightB = 0; break;
    case 28: lightR = 102; lightG = 255; lightB = 0; break;
    case 29: lightR = 153; lightG = 255; lightB = 0; break;    
    case 30: lightR = 204; lightG = 255; lightB = 0; break;
    case 31: lightR = 255; lightG = 255; lightB = 0; break;    
    case 32: lightR = 255; lightG = 204; lightB = 0; break;
    case 33: lightR = 255; lightG = 153; lightB = 0; break;
    case 34: lightR = 255; lightG = 102; lightB = 0; break;
    case 35: lightR = 255; lightG = 51; lightB = 0; break;    
    case 36: lightR = 255; lightG = 0; lightB = 0; break;
    default: lightR = 0; lightG = 0; lightB = 0;
  }
  
  
  //strip.Color(lightR, lightG, lightB);
  for (int i = 0; i < strip.numPixels(); i++)
  {
    strip.setPixelColor(i, lightR, lightG, lightB);
  }
  // Set the NeoPixel to a certain RGB Value
  strip.show();  // Show the NeoPixel Color

} else {
  for (int i = 0; i < strip.numPixels(); i++)
  {
    strip.setPixelColor(i, 0, 0, 0);
  }
  // Set the NeoPixel to a certain RGB Value
  strip.show();  // Show the NeoPixel Color
}
}




// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, c);
    strip.show();
    if(checkPos()){break;}
    if(showType == 0){break;}
    delay(wait);

  }
}

void rainbow(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256; j++) {
    for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel((i+j) & 255));
    }
    strip.show();
    delay(wait);
    if(checkPos()){break;}
    if(showType == 0){break;}

  }
}

// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256; j++) { // 5 cycles of all colors on wheel
    for(i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
    delay(wait);
    if(checkPos()){break;}    
    if(showType == 0){break;}
  }
}

//Theatre-style crawling lights.
void theaterChase(uint32_t c, uint8_t wait) {
  boolean quit = false;
    for (int q=0; q < 3; q++) {
      for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, c);    //turn every third pixel on
      }
      strip.show();
      if(checkPos()){quit = true; break;}
      delay(wait);
      for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, 0);        //turn every third pixel off
      }
      if(checkPos()){break;}
    }        
}

//Theatre-style crawling lights with rainbow effect
void theaterChaseRainbow(uint8_t wait) {
  boolean quit = false;
  for (int j=0; j < 256; j++) {     // cycle all 256 colors in the wheel
    for (int q=0; q < 3; q++) {
      for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, Wheel( (i+j) % 255));    //turn every third pixel on
      }
      strip.show();
      if(checkPos()){quit = true; break;}

      delay(wait);
      for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, 0);        //turn every third pixel off
      }
      if(checkPos()){break;}
    }
      if(checkPos()){break;}
  }
}

// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if(WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if(WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}

Sketch 2

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>
#endif
#define PIN 14
#define NUM_LEDS 40
#define pixelcolor ( )
// Parameter 1 = number of pixels in strip
// Parameter 2 = pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
//Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, PIN, NEO_GRB + NEO_KHZ800);

Adafruit_NeoPixel strip = Adafruit_NeoPixel(24, 14, NEO_GRB + NEO_KHZ800);


int R = 0; int G = 0; int B = 0;
int OldLamp;


#define BUTTON_PIN 4


const int buttonPin = 4;
const int PinA = 12;
const int PinB = 13;

int lastCount = 0;


volatile int virtualPosition = 365;


int pos = 0;


bool oldState = HIGH;
int showType = 0;




void time () {
 static unsigned long lastInterruptTime = 0;
 unsigned long interruptTime = millis();


 if (interruptTime - lastInterruptTime > 20) {
  if (digitalRead(PinB) == LOW)
{
 virtualPosition-- ;
}
 else {
 virtualPosition++ ;
}


 lastInterruptTime = interruptTime;
}
}




void setup(){
 pinMode(BUTTON_PIN, INPUT_PULLUP);



 Serial.begin(9600);


 pinMode(PinA, INPUT);
 pinMode(PinB, INPUT);


 attachInterrupt(digitalPinToInterrupt(PinA), time, LOW);


 Serial.println("Start");
strip.begin();
 strip.setBrightness(120);
}




boolean checkPos(){


if (virtualPosition != lastCount) {


 lastCount = virtualPosition ;

 pos = abs(virtualPosition % 36);


 Serial.println(pos);
 return true;
}
 return false;
}




void loop() {


 bool newState = digitalRead(BUTTON_PIN);


if (newState == LOW && oldState == HIGH) {
 delay(20);
 newState = digitalRead(BUTTON_PIN);
 if (newState == LOW) {
 showType++;
 if (showType > 1)
 showType=0;
}
}


 oldState = newState;

if (showType == 0) {
for (int i = 0; i < strip.numPixels(); i++)
{
 strip.setPixelColor(i, 0, 0, 0);
}
 strip.show();
}
if (showType == 1) {

 checkPos();

 switch(pos){

 case 0:
 OldLamp = random(100,200);
 R = 250-OldLamp; G = R-40-OldLamp; B = 40-OldLamp;
 if(G<0) G=0; if(R<0) R=0; if(B<0) B=0;
 delay(random(100,150));
 break;
 case 6: R = 255; G = 0; B = 0;break;
 case 7: R = 255; G = 0; B = 51; break;
 case 8: R = 255; G = 0; B = 102;break;
 case 9: R = 255; G = 0; B = 153;break;
 case 10: R = 255; G = 0;B = 204;break;
 case 11: R = 255; G = 0;B = 255;break;
 case 12: R = 204; G = 0; B = 255;break;
 case 13: R = 153; G = 0; B = 255;break;
 case 14: R = 102; G = 0; B = 255;break;
 case 15: R = 51;G = 0; B = 255;break;
 case 16: R = 0; G = 0; B = 255;break;
 case 17: R = 0; G = 51;B = 255;break;
 case 18: R = 0; G = 102; B = 255;break;
 case 19: R = 0; G = 153; B = 255;break;
 case 20: R = 0; G = 204; B = 255;break;
 case 21: R = 0; G = 255; B = 255;break;
 case 22: R = 0; G = 255; B = 204;break;
 case 23: R = 0; G = 255; B = 153;break;
 case 24: R = 0; G = 255; B = 102;break;
 case 25: R = 0; G = 255; B = 511;break;
 case 26: R = 0; G = 255; B = 0;break;
 case 27: R = 51; G = 255; B = 0;break;
 case 28: R = 102; G = 255; B = 0;break;
 case 29: R = 153; G = 255; B = 0;break;
 case 30: R = 204; G = 255; B = 0;break;
 case 31: R = 255; G = 255; B = 0;break;
 case 32: R = 255; G = 204; B = 0;break;
 case 33: R = 255; G = 153; B = 0;break;
 case 34: R = 255; G = 102; B = 0;break;
 case 35: R = 255; G = 51; B = 0;break;
 case 36: R = 255; G = 0; B = 0;break;
 default: R = 0; G = 0; B = 0;
}
{
 for (int i = 0; i < strip.numPixels(); i++)
{
 strip.setPixelColor(i, R, G, B);
}
 strip.show();
}
} else {
 for (int i = 0; i < strip.numPixels(); i++)
{
//strip.setPixelColor(i, 0, 0, 0);
}
{
 strip.show();
}
}}

Nick100 · March 7, 2022, 5:40am

Here is a diagram of the cct

GPIO14 = D5
GPIO4 = D2
GPIO12 = Pin A
GPIO 13 = Pin B

Grumpy_Mike · March 7, 2022, 6:00am

You seem to be sending 5V signals into a 3V3 processor!

Nick100 · March 7, 2022, 6:21am

The supply should have been indicated as 3.3v which is actually how it is connected. The supply to the ESP8266 is coming from USB

Grumpy_Mike · March 7, 2022, 8:25am

So anything else that is not true about your schematic, like that battery? Please post it again in a new post your schematic exactly how it is wired.

We can only work with accurate information.

So have you tried just using the rotary encoder on its own and printing values to the serial monitor?

Have you tried a much simpler program just involving the encoder and the LEDs, say the encoder just changing the brightness of one colour? That is the way to build up to a final complex code.

Nick100 · March 7, 2022, 7:28pm

Thank you for your advice. I'll apply simpler code and do some tests

Deva_Rishi · March 7, 2022, 10:25pm

As an issue that the encoder & the neopixel.h will probably not work together properly. The encoder requires interrupts to be enabled.
Try another library for the LEDs Makuna Neopixel can use either UART mode or DMA mode, which can both work with interrupts enabled.

system · September 3, 2022, 10:26pm

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.

Topic		Replies	Views
Nodemcu with 5 neopixels issues LEDs and Multiplexing	4	497	May 29, 2023
Why won't this NeoPixel bar work with ESP8266 General Guidance	7	4629	May 5, 2021
Help with NeoPixel LED Strip and ESP8266WiFi Programming	33	153	November 16, 2024
Neopixel - Make some LEDS solid and others blink LEDs and Multiplexing	7	1333	July 24, 2021
Switching Neopixel with ESP8266 and Arduino LEDs and Multiplexing	13	1698	May 6, 2021

ESP8266+Rot Encoder results in Neopixel not displaying

Related topics