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[项目] Arduino项目|仿真蜡烛

“Keith's Test Garage”想要一支LED蜡烛。虽然已经有了一些很逼真的项目，而且很容易找到，但他正在寻找更像实际的东西，经过几年的工作后，他们想出了一个相当惊人的复制品。

Arduino项目|仿真蜡烛图2

该设备的蜡嵌入式玻璃外壳内装有Arduino，内置一系列六个RGBW LED，随机闪烁以模拟火焰。

Arduino项目|仿真蜡烛图3

下面把原作者的相关代码和连线图分享出来了

代码：
[mw_shl_code=applescript,true]// FIRST TEST OF MIC AND FLAME SENSOR // Keith Kelly 2019-03-04 <a href="http://www.KeithsTestGarage.com"> www.KeithsTestGarage.com
</a>
// Milestone 1 of 3#define MIC_PIN A1 // Microphone Pin
#define FLAME_PIN A3 // IR Sensor Pin#define FLAME_DURATION 2000 // millis- duration of flame before lighting candle
#define FLAME_THRESHOLD 800 // 0...1023 - analog reading of FLAME value to detect
#define MIC_THRESHOLD 950 // 0...1023 - analog reading of MIC value to detect// Vars to keep track of things
bool smoking = false;
bool flaming = false;bool lit = false;
int flame_val = 0;
int mic_val = 0;// Vars for tracking pseudo-async times
unsigned long previousMillis = 0; // will store last time LED was updated
unsigned long flameStartedMillis = 0; // will store last time LED was updatedvoid setup(){ Serial.begin(9600); // uncomment this to figure sensor readings. // initialize pins
pinMode(FLAME_PIN, INPUT);
pinMode(MIC_PIN, INPUT);
pinMode(LED_BUILTIN, OUTPUT); digitalWrite(LED_BUILTIN, LOW); // Turn OFF built-in LED blowOutCandle(); // Make sure candle is off (but don't smoke)}void loop(){
checkSensors(); // Check for fire and strong winds
}// Checks for fire and strong winds every 50 milliseconds
void checkSensors(){
 unsigned long currentMillis = millis();
 if (currentMillis - previousMillis >= 50) { // only check every 50ms
flame_val = analogRead( FLAME_PIN );
mic_val = analogRead( MIC_PIN );
previousMillis = currentMillis;

// Uncomment below to check sensor readings.
Serial.print(mic_val);
Serial.print(" : ");
Serial.println(flame_val);
 } if (lit && mic_val > MIC_THRESHOLD){ // MIC REGISTERED SOUND. BLOW OUT.
blowOutCandle(); // Turn off light (and start SMOKING!)
lit = false;
 } if (!lit){ // if candle isn't lit
if (flame_val > FLAME_THRESHOLD) { // if flame is detected

 // record the starting time (if flame not yet detected)
 if (!flaming){ // if not flaming
 flaming = true;
 flameStartedMillis = millis(); // record time that flaming begins
 }
 else if (checkFlame()){ // has flame been flaming long enough?
 lightCandle(); // ok finally light it up.
 lit = true;
 }
}
else{ // no flame detected
 flaming = false;
}
 }
}// Check if flame has been detected long enough.
bool checkFlame(){
 unsigned long currentMillis = millis(); // get current time
 if (currentMillis - flameStartedMillis >= FLAME_DURATION) {
return true;
 }
 else
return false;
}// (pseudo)ASYNC light the candle by starting the animations
void lightCandle(){
digitalWrite(LED_BUILTIN, HIGH);
}void blowOutCandle(){
 digitalWrite(LED_BUILTIN, LOW);
}[/mw_shl_code]

[mw_shl_code=applescript,true]// Using technique from here https://learn.adafruit.com/multi-tasking-the-ardu...

// see link above for a good tutorial on this multi-task-ish way of doing things.

// Flicker Realistic Candle
// Keith Kelly 2019-03-04 www.KeithsTestGarage.com

// Milestone 2 of 3

#ifdef __AVR__
#include
#endif

// NeoPatterns will require the Adafruit NeoPixel library. Be sure to install that.
#include "NeoPatterns.h"

#define NEO_PIN 5 // First RGBW Strip Pin
#define NEO2_PIN 9 // Second RGBW Strip Pin
#define NEO_COUNT 3 // First RGBW Strip Count
#define NEO2_COUNT 3 // Second RGBW Strip Count
#define MIC_PIN A1 // Microphone Pin
#define FLAME_PIN A3 // IR Sensor Pin

#define FLAME_DURATION 2000 // millis- duration of flame before lighting candle
#define FLAME_THRESHOLD 800 // 0...1023 - analog reading of FLAME value to detect
#define MIC_THRESHOLD 950 // 0...1023 - analog reading of MIC value to detect

void Strip1Complete();
void Strip2Complete();

NeoPatterns Strip1(NEO_COUNT, NEO_PIN, NEO_RGBW + NEO_KHZ800, &Strip1Complete);
NeoPatterns Strip2(NEO_COUNT, NEO2_PIN, NEO_RGBW + NEO_KHZ800, &Strip2Complete);

uint32_t baseColor; // What is the ON resting color?
uint32_t offColor; // What is the OFF resting color?

// Vars to keep track of things
bool flaming = false;

bool lit = false;
int flame_val = 0;
int mic_val = 0;
byte rnd = 0;

// Vars for tracking pseudo-async times
unsigned long previousMillis = 0; // will store last time LED was updated
unsigned long flameStartedMillis = 0; // will store last time LED was updated

void setup(){

//Serial.begin(9600); // uncomment this to figure sensor readings.

// initialize pins
pinMode(FLAME_PIN, INPUT);
pinMode(MIC_PIN, INPUT);
pinMode(LED_BUILTIN, OUTPUT);

// Make sure the following pins are OFF
digitalWrite(LED_BUILTIN, LOW);

// Initialize NeoPixel Strip 1
Strip1.begin();
Strip1.show();
baseColor = Strip1.Color(2, 110, 0, 100);// GRBW
Strip1.Color1 = baseColor;

// Initialize NeoPixel Strip 2
Strip2.begin();
Strip2.show();
baseColor = Strip2.Color(2, 110, 0, 100);// GRBW
Strip2.Color1 = baseColor;

blowOutCandle(); // Make sure candle is off
}

void loop(){
checkSensors(); // Check for fire and strong winds
Strip1.Update();
Strip2.Update();
}

// Checks for fire and strong winds every 50 milliseconds
void checkSensors(){
 unsigned long currentMillis = millis();
 if (currentMillis - previousMillis >= 50) { // only check every 50ms
flame_val = analogRead( FLAME_PIN );
mic_val = analogRead( MIC_PIN );
previousMillis = currentMillis;

// Uncomment below to check sensor readings.
// Serial.print(mic_val);
// Serial.print(" : ");
// Serial.println(flame_val);
 }

 if (lit && mic_val > MIC_THRESHOLD){ // MIC REGISTERED SOUND. BLOW OUT.
blowOutCandle(); // Turn off light
lit = false;
 }

 if (!lit){ // if candle isn't lit
if (flame_val > FLAME_THRESHOLD) { // if flame is detected

 // record the starting time (if flame not yet detected)
 if (!flaming){ // if not flaming
 flaming = true;
 flameStartedMillis = millis(); // record time that flaming begins
 }
 else if (checkFlame()){ // has flame been flaming long enough?
 lightCandle(); // ok finally light it up.
 lit = true;
 }
}
else{ // no flame detected
 flaming = false;
}

 }
}

// Check if flame has been detected long enough.
bool checkFlame(){
 unsigned long currentMillis = millis(); // get current time
 if (currentMillis - flameStartedMillis >= FLAME_DURATION) {
return true;
 }
 else
return false;
}

//------------------------------------------------------------
//Completion Routines - get called on completion of a pattern
//------------------------------------------------------------

// The below configuration routines are the same except for the strip
// being used. I kept them separate so the strips can be configured
// with different ranges if desired.

void Strip1Complete(){
Strip1.Reverse();

if (Strip1.Direction == REVERSE){ // go back down
 Strip1.Interval = random(5,22); // choose random speed in range
}
else{ // pattern ended. Stop, then trigger re-flicker

 /* This needs an explanation:

 rnd = random(random(45,55),random(80,255));

 You'd think that we could just do random(45,255), right?

 Selecting the low and high randoms first helps make sure that
 the ending random number is *more likely* to fall within a limited range.

 When observing the flickering of a real candle, the flame generally bounces
 around in a certain range. But, every once in a while, it spikes high or low.

 This random(random, random) solves that problem! #proudnerddadmoment

 */
 rnd = random(random(45,55),random(80,255));

 Strip1.Pixel = random(0,Strip1.numPixels()); // pick a random Pixel
 Strip1.Interval = 1;
 Strip1.Color2 = Strip1.Color(2,rnd,0,rnd-10); //GRBW random red and random white-10
}
}

void Strip2Complete(){
Strip2.Reverse();

if (Strip2.Direction == REVERSE){ // go back down
 Strip2.Interval = random(5,22); // choose random speed in range
}
else{ // pattern ended. Stop, then trigger re-flicker
 rnd = random(random(45,55),random(80,255)); // see explanation in Strip1Complete().
 Strip2.Pixel = random(0,Strip2.numPixels()); // pick a random Pixel
 Strip2.Interval = 1;
 Strip2.Color2 = Strip2.Color(2,rnd,0,rnd-10); //GRBW random red and random white-10
}
}

// (pseudo)ASYNC light the candle by starting the animations
void lightCandle(){
Strip1.Flicker(Strip1.Color1, Strip1.Color2, 20, 5);
Strip2.Flicker(Strip2.Color1, Strip2.Color2, 20, 5);
}

void blowOutCandle(){
 cWipe(offColor, 10); // synchronously turn the candle off.

 // We don't want no stinking patterns.
 Strip1.ActivePattern = NONE;
 Strip2.ActivePattern = NONE;
}

// synchronous color wipe
void cWipe(uint32_t c, uint8_t wait) {
 for (uint16_t i = 0; i < Strip1.numPixels(); i++) {
Strip1.setPixelColor(i, c);
Strip1.show();
delay(wait);
 }
 for (uint16_t i = 0; i < Strip2.numPixels(); i++) {
Strip2.setPixelColor(i, c);
Strip2.show();
delay(wait);
 }
}[/mw_shl_code]

[mw_shl_code=applescript,true][Code segment omitted for clarity. See attached file.]

// *****************************************
// START Custom animation for LED candle
// *****************************************

// Initialize for a Flicker
void Flicker(uint32_t color1, uint32_t color2, uint16_t steps, uint8_t interval, direction dir = FORWARD)
{
 ActivePattern = FLICKER;
 Interval = interval;
 TotalSteps = steps;
 Color1 = color1;
 Color2 = color2;
 Index = 0;
 Direction = dir;
 Pixel = random(0,numPixels()); // random(min,max) --max is EXCLUSIVE
}

// Initialize for a Flicker
void FlickerUpdate()
{
 // Calculate linear interpolation between Color1 and Color2
 // Optimize order of operations to minimize truncation error
 uint8_t red = ((Red(Color1) * (TotalSteps - Index)) + (Red(Color2) * Index)) / TotalSteps;
 uint8_t green = ((Green(Color1) * (TotalSteps - Index)) + (Green(Color2) * Index)) / TotalSteps;
 uint8_t blue = ((Blue(Color1) * (TotalSteps - Index)) + (Blue(Color2) * Index)) / TotalSteps;
 uint8_t white = ((White(Color1) * (TotalSteps - Index)) + (White(Color2) * Index)) / TotalSteps;
 setPixelColor(Pixel,Color(red, green, blue, white));
 show();
 Increment();
}

// *****************************************
// END Custom animation for LED candle
// *****************************************

[Code segment omitted for clarity. See attached file.]

Attachments
KeithsCandle_M2_NoSmoke.inoKeithsCandle_M2_NoSmoke.ino[/mw_shl_code]
Arduino项目|仿真蜡烛图4

[mw_shl_code=applescript,true]// Using technique from here https://learn.adafruit.com/multi-tasking-the-ardu...

// see link above for a good tutorial on this multi-task-ish way of doing things.

// Flicker Realistic Candle
// Keith Kelly 2019-03-04 www.KeithsTestGarage.com

// Milestone 2 of 3

#ifdef __AVR__
#include
#endif

// NeoPatterns will require the Adafruit NeoPixel library. Be sure to install that.
#include "NeoPatterns.h"

#define NEO_PIN 5 // First RGBW Strip Pin
#define NEO2_PIN 9 // Second RGBW Strip Pin
#define NEO_COUNT 3 // First RGBW Strip Count
#define NEO2_COUNT 3 // Second RGBW Strip Count
#define MIC_PIN A1 // Microphone Pin
#define FLAME_PIN A3 // IR Sensor Pin

#define FLAME_DURATION 2000 // millis- duration of flame before lighting candle
#define FLAME_THRESHOLD 800 // 0...1023 - analog reading of FLAME value to detect
#define MIC_THRESHOLD 950 // 0...1023 - analog reading of MIC value to detect

void Strip1Complete();
void Strip2Complete();

NeoPatterns Strip1(NEO_COUNT, NEO_PIN, NEO_RGBW + NEO_KHZ800, &Strip1Complete);
NeoPatterns Strip2(NEO_COUNT, NEO2_PIN, NEO_RGBW + NEO_KHZ800, &Strip2Complete);

uint32_t baseColor; // What is the ON resting color?
uint32_t offColor; // What is the OFF resting color?

// Vars to keep track of things
bool flaming = false;

bool lit = false;
int flame_val = 0;
int mic_val = 0;
byte rnd = 0;

// Vars for tracking pseudo-async times
unsigned long previousMillis = 0; // will store last time LED was updated
unsigned long flameStartedMillis = 0; // will store last time LED was updated

void setup(){

//Serial.begin(9600); // uncomment this to figure sensor readings.

// initialize pins
pinMode(FLAME_PIN, INPUT);
pinMode(MIC_PIN, INPUT);
pinMode(LED_BUILTIN, OUTPUT);

// Make sure the following pins are OFF
digitalWrite(LED_BUILTIN, LOW);

// Initialize NeoPixel Strip 1
Strip1.begin();
Strip1.show();
baseColor = Strip1.Color(2, 110, 0, 100);// GRBW
Strip1.Color1 = baseColor;

// Initialize NeoPixel Strip 2
Strip2.begin();
Strip2.show();
baseColor = Strip2.Color(2, 110, 0, 100);// GRBW
Strip2.Color1 = baseColor;

blowOutCandle(); // Make sure candle is off
}

void loop(){
checkSensors(); // Check for fire and strong winds
Strip1.Update();
Strip2.Update();
}

// Checks for fire and strong winds every 50 milliseconds
void checkSensors(){
 unsigned long currentMillis = millis();
 if (currentMillis - previousMillis >= 50) { // only check every 50ms
flame_val = analogRead( FLAME_PIN );
mic_val = analogRead( MIC_PIN );
previousMillis = currentMillis;

// Uncomment below to check sensor readings.
// Serial.print(mic_val);
// Serial.print(" : ");
// Serial.println(flame_val);
 }

 if (lit && mic_val > MIC_THRESHOLD){ // MIC REGISTERED SOUND. BLOW OUT.
blowOutCandle(); // Turn off light
lit = false;
 }

 if (!lit){ // if candle isn't lit
if (flame_val > FLAME_THRESHOLD) { // if flame is detected

 // record the starting time (if flame not yet detected)
 if (!flaming){ // if not flaming
 flaming = true;
 flameStartedMillis = millis(); // record time that flaming begins
 }
 else if (checkFlame()){ // has flame been flaming long enough?
 lightCandle(); // ok finally light it up.
 lit = true;
 }
}
else{ // no flame detected
 flaming = false;
}

 }
}

// Check if flame has been detected long enough.
bool checkFlame(){
 unsigned long currentMillis = millis(); // get current time
 if (currentMillis - flameStartedMillis >= FLAME_DURATION) {
return true;
 }
 else
return false;
}

//------------------------------------------------------------
//Completion Routines - get called on completion of a pattern
//------------------------------------------------------------

// The below configuration routines are the same except for the strip
// being used. I kept them separate so the strips can be configured
// with different ranges if desired.

void Strip1Complete(){
Strip1.Reverse();

if (Strip1.Direction == REVERSE){ // go back down
 Strip1.Interval = random(5,22); // choose random speed in range
}
else{ // pattern ended. Stop, then trigger re-flicker

 /* This needs an explanation:

 rnd = random(random(45,55),random(80,255));

 You'd think that we could just do random(45,255), right?

 Selecting the low and high randoms first helps make sure that
 the ending random number is *more likely* to fall within a limited range.

 When observing the flickering of a real candle, the flame generally bounces
 around in a certain range. But, every once in a while, it spikes high or low.

 This random(random, random) solves that problem! #proudnerddadmoment

 */
 rnd = random(random(45,55),random(80,255));

 Strip1.Pixel = random(0,Strip1.numPixels()); // pick a random Pixel
 Strip1.Interval = 1;
 Strip1.Color2 = Strip1.Color(2,rnd,0,rnd-10); //GRBW random red and random white-10
}
}

void Strip2Complete(){
Strip2.Reverse();

if (Strip2.Direction == REVERSE){ // go back down
 Strip2.Interval = random(5,22); // choose random speed in range
}
else{ // pattern ended. Stop, then trigger re-flicker
 rnd = random(random(45,55),random(80,255)); // see explanation in Strip1Complete().
 Strip2.Pixel = random(0,Strip2.numPixels()); // pick a random Pixel
 Strip2.Interval = 1;
 Strip2.Color2 = Strip2.Color(2,rnd,0,rnd-10); //GRBW random red and random white-10
}
}

// (pseudo)ASYNC light the candle by starting the animations
void lightCandle(){
Strip1.Flicker(Strip1.Color1, Strip1.Color2, 20, 5);
Strip2.Flicker(Strip2.Color1, Strip2.Color2, 20, 5);
}

void blowOutCandle(){
 cWipe(offColor, 10); // synchronously turn the candle off.

 // We don't want no stinking patterns.
 Strip1.ActivePattern = NONE;
 Strip2.ActivePattern = NONE;
}

// synchronous color wipe
void cWipe(uint32_t c, uint8_t wait) {
 for (uint16_t i = 0; i < Strip1.numPixels(); i++) {
Strip1.setPixelColor(i, c);
Strip1.show();
delay(wait);
 }
 for (uint16_t i = 0; i < Strip2.numPixels(); i++) {
Strip2.setPixelColor(i, c);
Strip2.show();
delay(wait);
 }
}[/mw_shl_code]

[mw_shl_code=applescript,true][Code segment omitted for clarity. See attached file.]

// *****************************************
// START Custom animation for LED candle
// *****************************************

// Initialize for a Flicker
void Flicker(uint32_t color1, uint32_t color2, uint16_t steps, uint8_t interval, direction dir = FORWARD)
{
 ActivePattern = FLICKER;
 Interval = interval;
 TotalSteps = steps;
 Color1 = color1;
 Color2 = color2;
 Index = 0;
 Direction = dir;
 Pixel = random(0,numPixels()); // random(min,max) --max is EXCLUSIVE
}

// Initialize for a Flicker
void FlickerUpdate()
{
 // Calculate linear interpolation between Color1 and Color2
 // Optimize order of operations to minimize truncation error
 uint8_t red = ((Red(Color1) * (TotalSteps - Index)) + (Red(Color2) * Index)) / TotalSteps;
 uint8_t green = ((Green(Color1) * (TotalSteps - Index)) + (Green(Color2) * Index)) / TotalSteps;
 uint8_t blue = ((Blue(Color1) * (TotalSteps - Index)) + (Blue(Color2) * Index)) / TotalSteps;
 uint8_t white = ((White(Color1) * (TotalSteps - Index)) + (White(Color2) * Index)) / TotalSteps;
 setPixelColor(Pixel,Color(red, green, blue, white));
 show();
 Increment();
}

// *****************************************
// END Custom animation for LED candle
// *****************************************

[Code segment omitted for clarity. See attached file.][/mw_shl_code]
Arduino项目|仿真蜡烛图6

[mw_shl_code=applescript,true]// Using technique from here https://learn.adafruit.com/multi-tasking-the-ardu...
// see link above for a good tutorial on this multi-task-ish way of doing things.

// Flicker/Smoke Realistic Candle
// Keith Kelly 2019-03-04 www.KeithsTestGarage.com

// Milestone 3 of 3

#ifdef __AVR__
#include
#endif

// NeoPatterns will require the Adafruit NeoPixel library. Be sure to install that.
#include "NeoPatterns.h"

#define NEO_PIN 5 // First RGBW Strip Pin
#define NEO2_PIN 9 // Second RGBW Strip Pin
#define NEO_COUNT 3 // First RGBW Strip Count
#define NEO2_COUNT 3 // Second RGBW Strip Count
#define MIC_PIN A1 // Microphone Pin
#define FLAME_PIN A3 // IR Sensor Pin
#define SMOKE_PIN 3 // Smoke Pin
#define SMOKE_TIME_MILLIS 1200 // How long should smoke wire be heated?

#define FLAME_DURATION 2000 // millis- duration of flame before lighting candle
#define FLAME_THRESHOLD 800 // 0...1023 - analog reading of FLAME value to detect
#define MIC_THRESHOLD 950 // 0...1023 - analog reading of MIC value to detect

void Strip1Complete();
void Strip2Complete();

NeoPatterns Strip1(NEO_COUNT, NEO_PIN, NEO_RGBW + NEO_KHZ800, &Strip1Complete);
NeoPatterns Strip2(NEO_COUNT, NEO2_PIN, NEO_RGBW + NEO_KHZ800, &Strip2Complete);

uint32_t baseColor; // What is the ON resting color?
uint32_t offColor; // What is the OFF resting color?

// Vars to keep track of things
bool smoking = false;
bool flaming = false;

bool lit = false;
int flame_val = 0;
int mic_val = 0;
byte rnd = 0;

// Vars for tracking pseudo-async times
unsigned long previousMillis = 0; // will store last time LED was updated
unsigned long smokeStartedMillis = 0; // time smoking started
unsigned long flameStartedMillis = 0; // will store last time LED was updated

void setup(){

//Serial.begin(9600); // uncomment this to figure sensor readings.

// initialize pins
pinMode(FLAME_PIN, INPUT);
pinMode(MIC_PIN, INPUT);
pinMode(SMOKE_PIN, OUTPUT);
pinMode(LED_BUILTIN, OUTPUT);

// Make sure the following pins are OFF
digitalWrite(SMOKE_PIN, LOW);
digitalWrite(LED_BUILTIN, LOW);

// Initialize NeoPixel Strip 1
Strip1.begin();
Strip1.show();
baseColor = Strip1.Color(2, 110, 0, 100);// GRBW
Strip1.Color1 = baseColor;

// Initialize NeoPixel Strip 2
Strip2.begin();
Strip2.show();
baseColor = Strip2.Color(2, 110, 0, 100);// GRBW
Strip2.Color1 = baseColor;

blowOutCandle(false); // Make sure candle is off (but don't smoke)

}

void loop(){
smokeCheck(); // Check if we should stop smoking.
checkSensors(); // Check for fire and strong winds
Strip1.Update();
Strip2.Update();
}

// Checks for fire and strong winds every 50 milliseconds
void checkSensors(){
 unsigned long currentMillis = millis();
 if (currentMillis - previousMillis >= 50) { // only check every 50ms
flame_val = analogRead( FLAME_PIN );
mic_val = analogRead( MIC_PIN );
previousMillis = currentMillis;

// Uncomment below to check sensor readings.
// Serial.print(mic_val);
// Serial.print(" : ");
// Serial.println(flame_val);
 }

 if (lit && mic_val > MIC_THRESHOLD){ // MIC REGISTERED SOUND. BLOW OUT.
blowOutCandle(true); // Turn off light (and start SMOKING!)
lit = false;
 }

 if (!lit){ // if candle isn't lit
if (flame_val > FLAME_THRESHOLD) { // if flame is detected

 // record the starting time (if flame not yet detected)
 if (!flaming){ // if not flaming
 flaming = true;
 flameStartedMillis = millis(); // record time that flaming begins
 }
 else if (checkFlame()){ // has flame been flaming long enough?
 lightCandle(); // ok finally light it up.
 lit = true;
 }
}
else{ // no flame detected
 flaming = false;
}

 }
}

// Check if flame has been detected long enough.
bool checkFlame(){
 unsigned long currentMillis = millis(); // get current time
 if (currentMillis - flameStartedMillis >= FLAME_DURATION) {
return true;
 }
 else
return false;
}

//------------------------------------------------------------
//Completion Routines - get called on completion of a pattern
//------------------------------------------------------------

// The below configuration routines are the same except for the strip
// being used. I kept them separate so the strips can be configured
// with different ranges if desired.

void Strip1Complete(){
Strip1.Reverse();

if (Strip1.Direction == REVERSE){ // go back down
 Strip1.Interval = random(5,22); // choose random speed in range
}
else{ // pattern ended. Stop, then trigger re-flicker

 /* This needs an explanation:

 rnd = random(random(45,55),random(80,255));
 You'd think that we could just do random(45,255), right?
 Selecting the low and high randoms first helps make sure that
 the ending random number is *more likely* to fall within a limited range.
 When observing the flickering of a real candle, the flame generally bounces
 around in a certain range. But, every once in a while, it spikes high or low.
 This random(random, random) solves that problem! #proudnerddadmoment
 */
 rnd = random(random(45,55),random(80,255));

 Strip1.Pixel = random(0,Strip1.numPixels()); // pick a random Pixel
 Strip1.Interval = 1;
 Strip1.Color2 = Strip1.Color(2,rnd,0,rnd-10); //GRBW random red and random white-10
}
}

void Strip2Complete(){
Strip2.Reverse();

if (Strip2.Direction == REVERSE){ // go back down
 Strip2.Interval = random(5,22); // choose random speed in range
}
else{ // pattern ended. Stop, then trigger re-flicker
 rnd = random(random(45,55),random(80,255)); // see explanation in Strip1Complete().
 Strip2.Pixel = random(0,Strip2.numPixels()); // pick a random Pixel
 Strip2.Interval = 1;
 Strip2.Color2 = Strip2.Color(2,rnd,0,rnd-10); //GRBW random red and random white-10
}
}

// (pseudo)ASYNC light the candle by starting the animations
void lightCandle(){
Strip1.Flicker(Strip1.Color1, Strip1.Color2, 20, 5);
Strip2.Flicker(Strip2.Color1, Strip2.Color2, 20, 5);
}

void blowOutCandle(bool shouldSmoke){
 if(shouldSmoke)
smokeStart();

 cWipe(offColor, 10); // synchronously turn the candle off.

 // We don't want no stinking patterns.
 Strip1.ActivePattern = NONE;
 Strip2.ActivePattern = NONE;
}

// SMOKING METHODS
void smokeStart(){
 digitalWrite(SMOKE_PIN, HIGH); // HEAT SMOKE WIRE
 smoking = true;
 smokeStartedMillis = millis(); // record time smoking started
}

// Stop smoking if the time has come.
void smokeCheck(){
 if (!smoking)
return; // if not smoking, get out of here.

 unsigned long currentMillis = millis();
 if (currentMillis - smokeStartedMillis >= SMOKE_TIME_MILLIS) {
smokeStop(); // smoke break is over
 }
}

// Ok seriously now stop it
void smokeStop(){
 digitalWrite(SMOKE_PIN, LOW); // TURN OFF SMOKE WIRE
 smoking = false;
}

// synchronous color wipe
// To avoid smoke becoming fire, be sure to only
// use synchronous methods like this SPARINGLY and when you
// are sure it won't interfere with the smoking.
//
// In other words, here's something that would be very bad:
//
// smokeStart();
// cWipe(offColor, 1000); // CPU would get caught up in
// here for a while and would
// not stop the smoking process
//
// At this point, I'm only using it directly after smokeStop();

void cWipe(uint32_t c, uint8_t wait) {
 for (uint16_t i = 0; i < Strip1.numPixels(); i++) {
Strip1.setPixelColor(i, c);
Strip1.show();
delay(wait);
 }
 for (uint16_t i = 0; i < Strip2.numPixels(); i++) {
Strip2.setPixelColor(i, c);
Strip2.show();
delay(wait);
 }
}[/mw_shl_code]
需要详细教程的朋友可以去看原文

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