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Es handelt sich dabei um eine weit verbreitete Programmiersprache, die häufig für eingebettete Systeme und Mikrocontroller-Programmierung verwendet wird. Insbesondere wird dieser Code für Arduino-Projekte verwendet, wobei die Adafruit NeoPixel Bibliothek genutzt wird, um LEDs anzusteuern und Sensorwerte auszulesen.\n\nWenn du weitere Fragen zu den Funktionen oder zur Verwendung der Sprache hast, helfe ich dir gerne weiter.","role","assistant",{},{"_91":95,"_98":149,"_32":150,"_101":151,"_103":104,"_105":26,"_106":152,"_108":153,"_110":111},"aaa216ea-cdcb-4d71-ab46-c2aa0060ad8a",[41],{"_143":158,"_108":159},1719266708.601033,{"_138":139,"_140":156},0,{"_154":26,"_118":-5,"_119":120,"_121":122,"_125":147,"_126":127,"_128":129,"_155":26,"_130":10,"_131":14},"rebase_system_message","is_visually_hidden_from_conversation",[157],"","system",{},{"_91":147,"_98":163,"_32":164,"_101":165,"_103":104,"_106":107,"_108":166,"_110":111},"d4bf435d-3230-492a-9b51-e36c44be97bb",[95],{"_143":170,"_108":171},1719266704.652773,{"_138":139,"_140":168},{"_126":127,"_167":-5,"_128":129,"_118":-5,"_130":10,"_131":14},"message_source",[169],"welche sprache?","user",{},{"_91":161,"_98":175,"_32":176,"_101":177,"_103":104,"_105":26,"_106":107,"_108":178,"_110":111},"aaa20b93-22d7-453e-9abe-80f05bf34ad3",[147],{"_143":144,"_108":191},1718915823.929145,{"_138":139,"_140":189},{"_112":179,"_114":-5,"_115":180,"_117":26,"_118":-5,"_119":181,"_121":122,"_182":183,"_125":173,"_126":184,"_128":129,"_130":10,"_131":26,"_132":185},[],{"_28":134,"_135":187},"text-davinci-002-render-sha","model_adjustments",[186],"896e8d8d7c9458de-TXL",[],"auto:smaller_model:reached_message_cap",[188],100260,[190],"To achieve smooth animation when the first distance signal is registered, you need to adjust the `showDistanceOnLEDs()` function to initiate and control the animation. Here’s how you can modify the function to smoothly move the indicator over a 0.5-second period when the first distance signal is detected:\n\n### Updated `showDistanceOnLEDs()` Function:\n\n```cpp\nvoid showDistanceOnLEDs(int cm) {\n int ledIndex = constrain(cm - 1, 0, NUM_LEDS - 1); // Calculate the LED index based on the distance\n int startLED = max(0, ledIndex - 2); // Start of the indicator (5 LEDs total)\n int endLED = min(NUM_LEDS - 1, ledIndex + 2); // End of the indicator\n\n unsigned long currentTime = millis();\n\n // Check if this is the first distance signal after a period of no signal\n if (fadeStartTime == 0) {\n fadeStartTime = currentTime; // Start animation\n animationStartDistance = lastDistance; // Start from the last distance used\n animationEndDistance = cm; // End at the new distance\n }\n\n float animationProgress = min(1.0, (currentTime - fadeStartTime) / 500.0); // 500ms animation duration\n\n strip.clear(); // Clear previous display\n\n float brightness = map(cm, 0, 30, 10, 100) / 100.0; // Map the distance to brightness (10% to 100%)\n\n // Light up the indicator LEDs with varying brightness and smooth animation\n for (int i = startLED; i <= endLED; i++) {\n // Calculate interpolated position between start and end distances\n float position;\n if (animationProgress < 1.0) {\n position = (animationStartDistance + (animationEndDistance - animationStartDistance) * animationProgress) / NUM_LEDS;\n } else {\n position = (float)i / NUM_LEDS; // If animation complete, set position directly\n }\n\n uint32_t color = interpolateRainbow(position);\n\n float ledBrightness = brightness;\n if (i == ledIndex) {\n ledBrightness = brightness; // Center LED at mapped brightness\n } else if (i == ledIndex - 1 || i == ledIndex + 1) {\n ledBrightness *= 0.3; // Adjacent LEDs at 30% of the mapped brightness\n } else {\n ledBrightness *= 0.1; // All other LEDs at 10% of the mapped brightness\n }\n strip.setPixelColor(i, setBrightness(color, ledBrightness));\n }\n\n strip.show(); // Update the LED strip to show the new colors\n\n // If animation complete, reset animation parameters\n if (animationProgress >= 1.0) {\n fadeStartTime = 0;\n animationStartDistance = 0;\n animationEndDistance = 0;\n }\n\n lastDistance = cm; // Update the last distance used\n}\n```\n\n### Explanation:\n\n1. **Initialization Check:** When `fadeStartTime` is `0`, it indicates that this is the first distance signal after a period of no signal. This is where we initiate the animation.\n\n2. **Animation Progress Calculation:** `animationProgress` calculates how far along the animation is based on the elapsed time since `fadeStartTime`. It's normalized to a range between `0` and `1`, representing the animation completion from start to finish.\n\n3. **LED Brightness and Positioning:** Inside the `for` loop iterating through LEDs (`startLED` to `endLED`):\n - Calculate the interpolated `position` between `animationStartDistance` and `animationEndDistance` to smoothly move the indicator over time.\n - Adjust `ledBrightness` based on the LED’s position relative to `ledIndex` to create a fading effect.\n\n4. **Animation Completion:** Once `animationProgress` reaches `1.0`, the animation is considered complete, and we reset the animation parameters (`fadeStartTime`, `animationStartDistance`, and `animationEndDistance`).\n\n5. **Updating Last Distance:** `lastDistance` is updated at the end of the function to keep track of the last displayed distance.\n\nBy incorporating these changes, your LEDs should smoothly animate over a 0.5-second period whenever a new distance signal is detected, providing a visually appealing feedback mechanism based on the sensor readings. Adjust the animation duration (`500.0` milliseconds in `min(1.0, (currentTime - fadeStartTime) / 500.0)`) as needed to achieve the desired visual effect.",{},{"_91":173,"_98":195,"_32":196,"_101":197,"_103":104,"_106":107,"_108":198,"_110":111},"1936191d-204e-4c0c-bed4-e172b1635b46",[161],{"_143":170,"_108":201},1718915806.586806,{"_138":139,"_140":199},{"_126":184,"_167":-5,"_128":129,"_118":-5,"_130":10,"_131":14},[200],"when the first distance signal is registed, move the indicator smoothly with 0,5 seconds animation.",{},{"_91":193,"_98":205,"_32":206,"_101":207,"_103":104,"_105":14,"_106":107,"_108":208,"_110":111},"aaa2b49f-0797-43dd-ae3b-d363499d0f15",[173],{"_143":144,"_108":218},1718915716.777562,{"_138":139,"_140":216},{"_112":209,"_114":-5,"_115":210,"_117":26,"_118":-5,"_119":181,"_121":122,"_182":211,"_123":212,"_125":203,"_126":213,"_128":129,"_130":10,"_131":26,"_132":214},[],{"_28":215},[186],"AAAAAAAAAAAAAAAA","896e8a7c6f2fb60a-WAW",[],"max_tokens",[217],"The compilation errors indicate that `animationStartDistance` and `animationEndDistance` were not declared in the scope of the `showDistanceOnLEDs()` function. To resolve this, we need to declare these variables globally so that they can be accessed and modified by both `showDistanceOnLEDs()` and other functions. Here’s how you can modify your code to include these declarations and ensure proper scope:\n\n### Updated Arduino Sketch:\n\n```cpp\n#include \n\n#define NUM_SENSORS 4\n#define LED_PIN 11\n#define NUM_LEDS 30 // Adjust based on your actual setup\n\nconst int trigPin = 5;\nconst int echoPin = 9;\n\nlong duration;\nint distance;\nfloat val = 0;\nint lastVal = 0;\nint lastDistance = 0;\nunsigned long lastSignalTime = 0;\nunsigned long fadeStartTime = 0;\nbool fading = false;\nbool fadeDirection = true;\nuint32_t lastColor = 0;\n\n#define CC 0xB\n#define CHANNEL_VOLUME 0x07\n\nAdafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);\n\nuint32_t rainbowColors[] = {\n strip.Color(255, 0, 0), // Red\n strip.Color(255, 127, 0), // Orange\n strip.Color(255, 255, 0), // Yellow\n strip.Color(0, 255, 0), // Green\n strip.Color(0, 0, 255), // Blue\n strip.Color(75, 0, 130), // Indigo\n strip.Color(148, 0, 211) // Violet\n};\n\n// Global variables for animation\nint animationStartDistance = 0;\nint animationEndDistance = 0;\n\nvoid setup() {\n pinMode(trigPin, OUTPUT);\n pinMode(echoPin, INPUT);\n\n Serial.begin(115200);\n strip.begin();\n strip.show(); // Initialize all pixels to 'off'\n}\n\ntypedef struct {\n unsigned int channel : 4;\n unsigned int status : 4;\n uint8_t data1;\n uint8_t data2;\n} t_midiMsg;\n\nvoid MIDISend(uint8_t status, uint8_t channel, uint8_t data1, uint8_t data2) {\n t_midiMsg msg;\n msg.status = status & 0xF;\n msg.channel = (channel - 1) & 0xF;\n msg.data1 = data1 & 0x7F;\n msg.data2 = data2 & 0x7F;\n Serial.write((uint8_t *)&msg, 3);\n}\n\nuint32_t setBrightness(uint32_t color, float brightness) {\n uint8_t r = (uint8_t)(((color >> 16) & 0xFF) * brightness);\n uint8_t g = (uint8_t)(((color >> 8) & 0xFF) * brightness);\n uint8_t b = (uint8_t)((color & 0xFF) * brightness);\n return strip.Color(r, g, b);\n}\n\nuint32_t interpolateRainbow(float position) {\n int numColors = sizeof(rainbowColors) / sizeof(rainbowColors[0]);\n float segment = 1.0 / (numColors - 1);\n int idx1 = position / segment;\n int idx2 = min(idx1 + 1, numColors - 1);\n float factor = (position - (idx1 * segment)) / segment;\n\n uint32_t color1 = rainbowColors[idx1];\n uint32_t color2 = rainbowColors[idx2];\n\n uint8_t r1 = (color1 >> 16) & 0xFF;\n uint8_t g1 = (color1 >> 8) & 0xFF;\n uint8_t b1 = color1 & 0xFF;\n\n uint8_t r2 = (color2 >> 16) & 0xFF;\n uint8_t g2 = (color2 >> 8) & 0xFF;\n uint8_t b2 = color2 & 0xFF;\n\n uint8_t r = r1 + (r2 - r1) * factor;\n uint8_t g = g1 + (g2 - g1) * factor;\n uint8_t b = b1 + (b2 - b1) * factor;\n\n return strip.Color(r, g, b);\n}\n\nvoid showDistanceOnLEDs(int cm) {\n int ledIndex = constrain(cm - 1, 0, NUM_LEDS - 1); // Calculate the LED index based on the distance\n int startLED = max(0, ledIndex - 2); // Start of the indicator (5 LEDs total)\n int endLED = min(NUM_LEDS - 1, ledIndex + 2); // End of the indicator\n\n // Check if this is the first distance signal after a period of no signal\n if (fadeStartTime == 0) {\n fadeStartTime = millis(); // Start animation\n animationStartDistance = lastDistance; // Start from the last distance used\n animationEndDistance = cm; // End at the new distance\n }\n\n unsigned long currentTime = millis();\n float animationProgress = min(1.0, (currentTime - fadeStartTime) / 500.0); // 500ms animation duration\n\n strip.clear(); // Clear previous display\n\n float brightness = map(cm, 0, 30, 10, 100) / 100.0; // Map the distance to brightness (10% to 100%)\n\n // Light up the indicator LEDs with varying brightness and smooth animation\n for (int i = startLED; i <= endLED; i++) {\n // Calculate interpolated position between start and end distances\n float position;\n if (animationProgress < 1.0) {\n position = (animationStartDistance + (animationEndDistance - animationStartDistance) * animationProgress) / NUM_LEDS;\n } else {\n position = (float)i / NUM_LEDS; // If animation complete, set position directly\n }\n\n uint32_t color = interpolateRainbow(position);\n\n float ledBrightness = brightness;\n if (i == ledIndex) {\n ledBrightness = brightness; // Center LED at mapped brightness\n } else if (i == ledIndex - 1 || i == ledIndex + 1) {\n ledBrightness *= 0.3; // Adjacent LEDs at 30% of the mapped brightness\n } else {\n ledBrightness *= 0.1; // All other LEDs at 10% of the mapped brightness\n }\n strip.setPixelColor(i, setBrightness(color, ledBrightness));\n }\n\n strip.show(); // Update the LED strip to show the new colors\n\n // If animation complete, reset animation parameters\n if (animationProgress >= 1.0) {\n fadeStartTime = 0;\n animationStartDistance = 0;\n animationEndDistance = 0;\n }\n\n lastDistance = cm; // Update the last distance used\n}\n\nvoid fadeIndicator(int startLED, int endLED) {\n unsigned long currentTime = millis();\n float fadeDuration = 1000.0; // 1 second for each half of the cycle\n float progress = (currentTime - fadeStartTime) / fadeDuration;\n\n if (progress >= 1.0) {\n fadeStartTime = currentTime;\n fadeDirection = !fadeDirection; // Reverse the fade direction\n progress = 0.0; // Reset progress\n }\n\n float brightness = fadeDirection ? progress : 1.0 - progress; // Calculate the brightness\n\n for (int i = startLED; i <= endLED; i++) {\n float position = (float)i / (NUM_LEDS - 1);\n uint32_t color = interpolateRainbow(position);\n strip.setPixelColor(i, setBrightness(color, brightness));\n }\n strip.show();\n}\n\nvoid loop() {\n digitalWrite(trigPin, LOW);\n delayMicroseconds(2);\n digitalWrite(trigPin, HIGH);\n delayMicroseconds(10);\n digitalWrite(trigPin, LOW);\n\n duration = pulseIn(echoPin, HIGH);\n distance = duration * 0.034 / 2;\n\n unsigned long currentTime = millis();\n\n // Check if a signal is detected\n if (distance < 31) {\n val = (distance * 4.2) * -1;\n if (val != lastVal) {\n MIDISend(CC, 1, CHANNEL_VOLUME, val);\n lastVal = val;\n }\n showDistanceOnLEDs(distance);\n lastSignalTime = currentTime; // Update the last signal time\n fading = false; // Stop fading\n } else if (currentTime - lastSignalTime > 3000) { // No signal detected for 3 seconds\n if (!fading) {\n fadeStartTime = currentTime;\n fading = true;\n }\n // Get the last used LED range\n int ledIndex = constrain(lastDistance - 1, 0, NUM_LEDS - 1);\n int startLED = max(0, ledIndex - 2);\n int endLED = min(NUM_LEDS - 1, ledIndex + 2);\n fadeIndicator(startLED, endLED); // Start fading the indicator\n }\n\n delay(10); // Reduced delay to increase sampling rate\n}\n```\n\n### Explanation:\n\n- **Global Variables:** Declared `animationStartDistance` and `animationEndDistance` globally so that they can be accessed and modified from any function within the sketch.\n\n- **`",{},{"_91":203,"_98":222,"_32":223,"_101":224,"_103":104,"_106":107,"_108":225,"_110":111},"7ff0c4c8-6429-4caf-a570-edd90e43f0ed",[193],{"_143":170,"_108":228},1718915681.000747,{"_138":139,"_140":226},{"_126":213,"_167":-5,"_128":129,"_118":-5,"_130":10,"_131":14},[227],"C:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino: In function 'void showDistanceOnLEDs(int)':\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:101:5: error: 'animationStartDistance' was not declared in this scope\n animationStartDistance = lastDistance; // Start from the last distance used\n ^~~~~~~~~~~~~~~~~~~~~~\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:102:5: error: 'animationEndDistance' was not declared in this scope\n animationEndDistance = cm; // End at the new distance\n ^~~~~~~~~~~~~~~~~~~~\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:117:19: error: 'animationStartDistance' was not declared in this scope\n position = (animationStartDistance + (animationEndDistance - animationStartDistance) * animationProgress) / NUM_LEDS;\n ^~~~~~~~~~~~~~~~~~~~~~\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:117:45: error: 'animationEndDistance' was not declared in this scope\n position = (animationStartDistance + (animationEndDistance - animationStartDistance) * animationProgress) / NUM_LEDS;\n ^~~~~~~~~~~~~~~~~~~~\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:140:5: error: 'animationStartDistance' was not declared in this scope\n animationStartDistance = 0;\n ^~~~~~~~~~~~~~~~~~~~~~\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:141:5: error: 'animationEndDistance' was not declared in this scope\n animationEndDistance = 0;\n ^~~~~~~~~~~~~~~~~~~~\n\nexit status 1\n\nCompilation error: 'animationStartDistance' was not declared in this scope",{},{"_91":220,"_98":232,"_32":233,"_101":234,"_103":104,"_105":14,"_106":107,"_108":235,"_110":111},"aaa2650e-c033-4920-ba94-3717cb6f5b1c",[203],{"_143":144,"_108":244},1718915627.233464,{"_138":139,"_140":242},{"_112":236,"_114":-5,"_115":237,"_117":26,"_118":-5,"_119":181,"_121":122,"_182":238,"_123":239,"_125":230,"_126":240,"_128":129,"_130":10,"_131":26,"_132":241},[],{"_28":215},[186],"AAAAAAAAAAAAAAAAAAAAA","896e88529d3458de-TXL",[],[243],"Thank you for providing the rest of your code. Let's integrate the `showDistanceOnLEDs()` function with the necessary adjustments for smooth animation and ensure all variables and functions are properly declared and accessible. Here's the updated code with corrections and adjustments:\n\n### Complete Arduino Sketch:\n\n```cpp\n#include \n\n#define NUM_SENSORS 4\n#define LED_PIN 11\n#define NUM_LEDS 30 // Adjust based on your actual setup\n\nconst int trigPin = 5;\nconst int echoPin = 9;\n\nlong duration;\nint distance;\nfloat val = 0;\nint lastVal = 0;\nint lastDistance = 0;\nunsigned long lastSignalTime = 0;\nunsigned long fadeStartTime = 0;\nbool fading = false;\nbool fadeDirection = true;\nuint32_t lastColor = 0;\n\n#define CC 0xB\n#define CHANNEL_VOLUME 0x07\n\nAdafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);\n\nuint32_t rainbowColors[] = {\n strip.Color(255, 0, 0), // Red\n strip.Color(255, 127, 0), // Orange\n strip.Color(255, 255, 0), // Yellow\n strip.Color(0, 255, 0), // Green\n strip.Color(0, 0, 255), // Blue\n strip.Color(75, 0, 130), // Indigo\n strip.Color(148, 0, 211) // Violet\n};\n\nvoid setup() {\n pinMode(trigPin, OUTPUT);\n pinMode(echoPin, INPUT);\n\n Serial.begin(115200);\n strip.begin();\n strip.show(); // Initialize all pixels to 'off'\n}\n\ntypedef struct {\n unsigned int channel : 4;\n unsigned int status : 4;\n uint8_t data1;\n uint8_t data2;\n} t_midiMsg;\n\nvoid MIDISend(uint8_t status, uint8_t channel, uint8_t data1, uint8_t data2) {\n t_midiMsg msg;\n msg.status = status & 0xF;\n msg.channel = (channel - 1) & 0xF;\n msg.data1 = data1 & 0x7F;\n msg.data2 = data2 & 0x7F;\n Serial.write((uint8_t *)&msg, 3);\n}\n\nuint32_t setBrightness(uint32_t color, float brightness) {\n uint8_t r = (uint8_t)(((color >> 16) & 0xFF) * brightness);\n uint8_t g = (uint8_t)(((color >> 8) & 0xFF) * brightness);\n uint8_t b = (uint8_t)((color & 0xFF) * brightness);\n return strip.Color(r, g, b);\n}\n\nuint32_t interpolateRainbow(float position) {\n int numColors = sizeof(rainbowColors) / sizeof(rainbowColors[0]);\n float segment = 1.0 / (numColors - 1);\n int idx1 = position / segment;\n int idx2 = min(idx1 + 1, numColors - 1);\n float factor = (position - (idx1 * segment)) / segment;\n\n uint32_t color1 = rainbowColors[idx1];\n uint32_t color2 = rainbowColors[idx2];\n\n uint8_t r1 = (color1 >> 16) & 0xFF;\n uint8_t g1 = (color1 >> 8) & 0xFF;\n uint8_t b1 = color1 & 0xFF;\n\n uint8_t r2 = (color2 >> 16) & 0xFF;\n uint8_t g2 = (color2 >> 8) & 0xFF;\n uint8_t b2 = color2 & 0xFF;\n\n uint8_t r = r1 + (r2 - r1) * factor;\n uint8_t g = g1 + (g2 - g1) * factor;\n uint8_t b = b1 + (b2 - b1) * factor;\n\n return strip.Color(r, g, b);\n}\n\nvoid showDistanceOnLEDs(int cm) {\n int ledIndex = constrain(cm - 1, 0, NUM_LEDS - 1); // Calculate the LED index based on the distance\n int startLED = max(0, ledIndex - 2); // Start of the indicator (5 LEDs total)\n int endLED = min(NUM_LEDS - 1, ledIndex + 2); // End of the indicator\n\n // Check if this is the first distance signal after a period of no signal\n if (fadeStartTime == 0) {\n fadeStartTime = millis(); // Start animation\n animationStartDistance = lastDistance; // Start from the last distance used\n animationEndDistance = cm; // End at the new distance\n }\n\n unsigned long currentTime = millis();\n float animationProgress = min(1.0, (currentTime - fadeStartTime) / 500.0); // 500ms animation duration\n\n strip.clear(); // Clear previous display\n\n float brightness = map(cm, 0, 30, 10, 100) / 100.0; // Map the distance to brightness (10% to 100%)\n\n // Light up the indicator LEDs with varying brightness and smooth animation\n for (int i = startLED; i <= endLED; i++) {\n // Calculate interpolated position between start and end distances\n float position;\n if (animationProgress < 1.0) {\n position = (animationStartDistance + (animationEndDistance - animationStartDistance) * animationProgress) / NUM_LEDS;\n } else {\n position = (float)i / NUM_LEDS; // If animation complete, set position directly\n }\n\n uint32_t color = interpolateRainbow(position);\n\n float ledBrightness = brightness;\n if (i == ledIndex) {\n ledBrightness = brightness; // Center LED at mapped brightness\n } else if (i == ledIndex - 1 || i == ledIndex + 1) {\n ledBrightness *= 0.3; // Adjacent LEDs at 30% of the mapped brightness\n } else {\n ledBrightness *= 0.1; // All other LEDs at 10% of the mapped brightness\n }\n strip.setPixelColor(i, setBrightness(color, ledBrightness));\n }\n\n strip.show(); // Update the LED strip to show the new colors\n\n // If animation complete, reset animation parameters\n if (animationProgress >= 1.0) {\n fadeStartTime = 0;\n animationStartDistance = 0;\n animationEndDistance = 0;\n }\n\n lastDistance = cm; // Update the last distance used\n}\n\nvoid fadeIndicator(int startLED, int endLED) {\n unsigned long currentTime = millis();\n float fadeDuration = 1000.0; // 1 second for each half of the cycle\n float progress = (currentTime - fadeStartTime) / fadeDuration;\n\n if (progress >= 1.0) {\n fadeStartTime = currentTime;\n fadeDirection = !fadeDirection; // Reverse the fade direction\n progress = 0.0; // Reset progress\n }\n\n float brightness = fadeDirection ? progress : 1.0 - progress; // Calculate the brightness\n\n for (int i = startLED; i <= endLED; i++) {\n float position = (float)i / (NUM_LEDS - 1);\n uint32_t color = interpolateRainbow(position);\n strip.setPixelColor(i, setBrightness(color, brightness));\n }\n strip.show();\n}\n\nvoid loop() {\n digitalWrite(trigPin, LOW);\n delayMicroseconds(2);\n digitalWrite(trigPin, HIGH);\n delayMicroseconds(10);\n digitalWrite(trigPin, LOW);\n\n duration = pulseIn(echoPin, HIGH);\n distance = duration * 0.034 / 2;\n\n unsigned long currentTime = millis();\n\n // Check if a signal is detected\n if (distance < 31) {\n val = (distance * 4.2) * -1;\n if (val != lastVal) {\n MIDISend(CC, 1, CHANNEL_VOLUME, val);\n lastVal = val;\n }\n showDistanceOnLEDs(distance);\n lastSignalTime = currentTime; // Update the last signal time\n fading = false; // Stop fading\n } else if (currentTime - lastSignalTime > 3000) { // No signal detected for 3 seconds\n if (!fading) {\n fadeStartTime = currentTime;\n fading = true;\n }\n // Get the last used LED range\n int ledIndex = constrain(lastDistance - 1, 0, NUM_LEDS - 1);\n int startLED = max(0, ledIndex - 2);\n int endLED = min(NUM_LEDS - 1, ledIndex + 2);\n fadeIndicator(startLED, endLED); // Start fading the indicator\n }\n\n delay(10); // Reduced delay to increase sampling rate\n}\n```\n\n### Explanation:\n\n- **Global Variables and Definitions:** Ensure `NUM_LEDS`, `strip`, and other necessary variables (`fadeStartTime`, `animationStartDistance`, `animationEndDistance`, etc.) are defined globally to ensure all functions can access them.\n\n- **Functions:** \n - `MIDISend()`: Sends MIDI messages based on distance values.\n - `setBrightness()`: Adjusts LED brightness.\n - `interpolateRainbow()`:",{},{"_91":230,"_98":248,"_32":249,"_101":250,"_103":104,"_106":107,"_108":251,"_110":111},"51beb6cd-1b41-4c32-9126-14e60627f1b4",[220],{"_143":170,"_108":254},1718915592.342582,{"_138":139,"_140":252},{"_126":240,"_167":-5,"_128":129,"_118":-5,"_130":10,"_131":14},[253],"here is the rest of code: lastDistance = cm; // Update the last distance used\n}\n\nvoid fadeIndicator(int startLED, int endLED) {\n unsigned long currentTime = millis();\n float fadeDuration = 1000.0; // 1 second for each half of the cycle\n float progress = (currentTime - fadeStartTime) / fadeDuration;\n\n if (progress >= 1.0) {\n fadeStartTime = currentTime;\n fadeDirection = !fadeDirection; // Reverse the fade direction\n progress = 0.0; // Reset progress\n }\n\n float brightness = fadeDirection ? progress : 1.0 - progress; // Calculate the brightness\n\n for (int i = startLED; i <= endLED; i++) {\n float position = (float)i / (NUM_LEDS - 1);\n uint32_t color = interpolateRainbow(position);\n strip.setPixelColor(i, setBrightness(color, brightness));\n }\n strip.show();\n}\n\nvoid loop() {\n digitalWrite(trigPin, LOW);\n delayMicroseconds(2);\n digitalWrite(trigPin, HIGH);\n delayMicroseconds(10);\n digitalWrite(trigPin, LOW);\n\n duration = pulseIn(echoPin, HIGH);\n distance = duration * 0.034 / 2;\n\n unsigned long currentTime = millis();\n\n // Check if a signal is detected\n if (distance < 31) {\n val = (distance * 4.2) * -1;\n if (val != lastVal) {\n MIDISend(CC, 1, CHANNEL_VOLUME, val);\n lastVal = val;\n }\n showDistanceOnLEDs(distance);\n lastSignalTime = currentTime; // Update the last signal time\n fading = false; // Stop fading\n } else if (currentTime - lastSignalTime > 3000) { // No signal detected for 3 seconds\n if (!fading) {\n fadeStartTime = currentTime;\n fading = true;\n }\n // Get the last used LED range\n int ledIndex = constrain(lastDistance - 1, 0, NUM_LEDS - 1);\n int startLED = max(0, ledIndex - 2);\n int endLED = min(NUM_LEDS - 1, ledIndex + 2);\n fadeIndicator(startLED, endLED); // Start fading the indicator\n }\n\n delay(10); // Reduced delay to increase sampling rate\n}\n",{},{"_91":246,"_98":258,"_32":259,"_101":260,"_103":104,"_105":26,"_106":107,"_108":261,"_110":111},"aaa27744-fa2d-4957-9025-4b8306146e22",[230],{"_143":144,"_108":271},1718915531.308392,{"_138":139,"_140":269},{"_112":262,"_114":-5,"_118":-5,"_119":181,"_121":122,"_182":263,"_123":264,"_125":256,"_115":265,"_117":26,"_126":266,"_128":129,"_130":10,"_131":26,"_132":267},[],[186],"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",{"_28":134,"_135":268},"896e867e1965b600-WAW",[],[188],[270],"The compilation error you're encountering indicates that some variables and objects are not properly declared or accessible within the `showDistanceOnLEDs()` function. Here’s how we can resolve these issues step by step:\n\n### Issues Identified:\n\n1. **`NUM_LEDS` Scope Issue:**\n - The compiler doesn't recognize `NUM_LEDS` within the `showDistanceOnLEDs()` function, suggesting it might not be declared or accessible.\n\n2. **Other Variables and Functions:**\n - `lastDistance`, `strip`, `interpolateRainbow()`, and `setBrightness()` are also reported as not declared, likely due to scope or ordering issues.\n\n### Solutions:\n\n1. **Declare `NUM_LEDS` Globally:**\n - Ensure that `NUM_LEDS` is declared at the global scope, typically at the beginning of your sketch before any functions. This allows all functions to access it.\n\n ```cpp\n #define NUM_LEDS 30 // Example: Define the number of LEDs in your strip\n\n // Other global variables and constants\n unsigned long animationStartTime = 0;\n float animationDuration = 500.0; // 500 milliseconds (0.5 seconds) animation duration\n int animationStartDistance = 0;\n int animationEndDistance = 0;\n ```\n\n2. **Ensure Objects and Functions are Declared:**\n - Make sure that `strip`, `lastDistance`, `interpolateRainbow()`, and `setBrightness()` are properly declared and accessible where they are used. Typically, objects like `strip` (Adafruit NeoPixel) should be declared globally, especially if they are used across multiple functions.\n\n - For functions like `interpolateRainbow()` and `setBrightness()`, ensure they are declared above `showDistanceOnLEDs()` or at least their prototypes (function signatures) are visible before they are called.\n\n ```cpp\n // Declarations or includes for necessary libraries\n #include \n\n // Constants and definitions\n #define NUM_SENSORS 4\n #define LED_PIN 11\n #define NUM_LEDS 30 // Ensure this matches the actual number of LEDs in your setup\n\n // Other global variables and constants\n unsigned long animationStartTime = 0;\n float animationDuration = 500.0; // 500 milliseconds (0.5 seconds) animation duration\n int animationStartDistance = 0;\n int animationEndDistance = 0;\n\n Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);\n\n // Function prototypes\n uint32_t interpolateRainbow(float position);\n uint32_t setBrightness(uint32_t color, float brightness);\n\n // Rest of your code...\n\n void setup() {\n // Setup code\n }\n\n void loop() {\n // Loop code\n }\n\n void showDistanceOnLEDs(int cm) {\n // Function implementation\n }\n\n // Other functions...\n\n ```\n\n### Additional Considerations:\n\n- **Library Inclusion:** Ensure that you have included the necessary libraries (`Adafruit_NeoPixel.h` in this case) at the beginning of your sketch or before they are used.\n\n- **Function Prototypes:** If functions like `interpolateRainbow()` and `setBrightness()` are defined after `showDistanceOnLEDs()`, consider adding function prototypes (`uint32_t interpolateRainbow(float position);` and `uint32_t setBrightness(uint32_t color, float brightness);`) before `showDistanceOnLEDs()` to inform the compiler about their existence.\n\nBy addressing these issues, you ensure that all variables and functions are properly declared and accessible throughout your Arduino sketch, resolving the compilation errors related to scope and visibility.",{},{"_91":256,"_98":275,"_32":276,"_101":277,"_103":104,"_106":107,"_108":278,"_110":111},"3a92a136-9496-4a13-9f99-94b549acc657",[246],{"_143":170,"_108":281},1718915517.383635,{"_138":139,"_140":279},{"_126":266,"_167":-5,"_128":129,"_118":-5,"_130":10,"_131":14},[280],"In file included from C:\\Users\\Ricardo\\AppData\\Local\\Temp\\arduino\\sketches\\B64395BD11F3FF199F8B7BB116DD4283\\sketch\\sketch_jun20b.ino.cpp:1:0:\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino: In function 'void showDistanceOnLEDs(int)':\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:8:39: error: 'NUM_LEDS' was not declared in this scope\n int ledIndex = constrain(cm - 1, 0, NUM_LEDS - 1); // Calculate the LED index based on the distance\n ^\nC:\\Users\\Ricardo\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino/Arduino.h:95:60: note: in definition of macro 'constrain'\n #define constrain(amt,low,high) ((amt)<(low)?(low):((amt)>(high)?(high):(amt)))\n ^~~~\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:15:30: error: 'lastDistance' was not declared in this scope\n animationStartDistance = lastDistance; // Start from the last distance used\n ^~~~~~~~~~~~\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:22:3: error: 'strip' was not declared in this scope\n strip.clear(); // Clear previous display\n ^~~~~\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:22:3: note: suggested alternative: 'strupr'\n strip.clear(); // Clear previous display\n ^~~~~\n strupr\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:36:22: error: 'interpolateRainbow' was not declared in this scope\n uint32_t color = interpolateRainbow(position);\n ^~~~~~~~~~~~~~~~~~\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:46:28: error: 'setBrightness' was not declared in this scope\n strip.setPixelColor(i, setBrightness(color, ledBrightness));\n ^~~~~~~~~~~~~\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:46:28: note: suggested alternative: 'ledBrightness'\n strip.setPixelColor(i, setBrightness(color, ledBrightness));\n ^~~~~~~~~~~~~\n ledBrightness\nC:\\Users\\Ricardo\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2024520-11412-132p150.qtvd\\sketch_jun20b\\sketch_jun20b.ino:58:3: error: 'lastDistance' was not declared in this scope\n lastDistance = cm; // Update the last distance used\n ^~~~~~~~~~~~\n\nexit status 1\n\nCompilation error: 'NUM_LEDS' was not declared in this scope",{},{"_91":273,"_98":285,"_32":286,"_101":287,"_103":104,"_105":26,"_106":107,"_108":288,"_110":111},"aaa256da-4ce3-4a15-a271-5c49cc840e52",[256],{"_143":144,"_108":298},1718915465.520986,{"_138":139,"_140":296},{"_112":289,"_114":-5,"_118":-5,"_119":181,"_121":122,"_182":290,"_123":291,"_125":283,"_115":292,"_117":26,"_126":293,"_128":129,"_130":10,"_131":26,"_132":294},[],[186],"AAAAA",{"_28":134,"_135":295},"896e84c9ee774528-TXL",[],[188],[297],"To achieve a smooth animation when the first distance signal is registered, where the indicator moves smoothly over 0.5 seconds to the new position, we need to modify the `showDistanceOnLEDs()` function to include a smooth transition effect. Here's how you can adjust the code:\n\n### Changes to `showDistanceOnLEDs()` Function:\n\n1. **Introduce Animation Parameters:**\n - We'll introduce variables to track the animation start time and duration for the smooth transition.\n\n2. **Modify LED Update Logic:**\n - Instead of directly setting the LED colors, we'll calculate intermediate positions based on the animation progress.\n\nHere's the updated `showDistanceOnLEDs()` function:\n\n```cpp\n// Global variables for animation control\nunsigned long animationStartTime = 0;\nfloat animationDuration = 500.0; // 500 milliseconds (0.5 seconds) animation duration\nint animationStartDistance = 0;\nint animationEndDistance = 0;\n\nvoid showDistanceOnLEDs(int cm) {\n int ledIndex = constrain(cm - 1, 0, NUM_LEDS - 1); // Calculate the LED index based on the distance\n int startLED = max(0, ledIndex - 2); // Start of the indicator (5 LEDs total)\n int endLED = min(NUM_LEDS - 1, ledIndex + 2); // End of the indicator\n\n // Check if this is the first distance signal after a period of no signal\n if (animationStartTime == 0) {\n animationStartTime = millis(); // Start animation\n animationStartDistance = lastDistance; // Start from the last distance used\n animationEndDistance = cm; // End at the new distance\n }\n\n unsigned long currentTime = millis();\n float animationProgress = min(1.0, (currentTime - animationStartTime) / animationDuration); // Calculate animation progress (0 to 1)\n\n strip.clear(); // Clear previous display\n\n float brightness = map(cm, 0, 30, 10, 100) / 100.0; // Map the distance to brightness (10% to 100%)\n\n // Light up the indicator LEDs with varying brightness and smooth animation\n for (int i = startLED; i <= endLED; i++) {\n // Calculate interpolated position between start and end distances\n float position;\n if (animationProgress < 1.0) {\n position = (animationStartDistance + (animationEndDistance - animationStartDistance) * animationProgress) / NUM_LEDS;\n } else {\n position = (float)i / NUM_LEDS; // If animation complete, set position directly\n }\n\n uint32_t color = interpolateRainbow(position);\n\n float ledBrightness = brightness;\n if (i == ledIndex) {\n ledBrightness = brightness; // Center LED at mapped brightness\n } else if (i == ledIndex - 1 || i == ledIndex + 1) {\n ledBrightness *= 0.3; // Adjacent LEDs at 30% of the mapped brightness\n } else {\n ledBrightness *= 0.1; // All other LEDs at 10% of the mapped brightness\n }\n strip.setPixelColor(i, setBrightness(color, ledBrightness));\n }\n\n strip.show(); // Update the LED strip to show the new colors\n\n // If animation complete, reset animation parameters\n if (animationProgress >= 1.0) {\n animationStartTime = 0;\n animationStartDistance = 0;\n animationEndDistance = 0;\n }\n\n lastDistance = cm; // Update the last distance used\n}\n```\n\n### Explanation:\n\n- **Animation Parameters:** `animationStartTime`, `animationStartDistance`, and `animationEndDistance` are introduced to manage the animation state.\n \n- **Animation Logic:** When a new distance signal (`cm`) is registered:\n - If `animationStartTime` is `0`, it means it's the first signal after a period of no signal, so we start the animation.\n - Calculate `animationProgress` to smoothly transition from `animationStartDistance` to `animationEndDistance` over `animationDuration`.\n \n- **LED Display:** Instead of directly setting LED colors, we calculate `position` dynamically based on `animationProgress`, allowing for a smooth transition of the indicator.\n\n- **Animation Completion:** Once `animationProgress` reaches `1.0` (animation complete), reset animation parameters to prepare for the next animation.\n\n### Implementation Notes:\n\n- Ensure `delay(10)` in the `loop()` function allows frequent updates to `showDistanceOnLEDs()` for smooth animation.\n- Adjust `animationDuration` as needed to achieve the desired visual effect (currently set to 0.5 seconds).\n- This approach ensures a smooth transition of the LED indicator whenever a new distance signal is detected, enhancing the visual feedback of the system.",{},{"_91":283,"_98":302,"_32":303,"_101":304,"_103":104,"_106":107,"_108":305,"_110":111},"38a8b04a-29f0-4303-b820-41b2c8e8aad6",[273],{"_143":170,"_108":308},1718915447.618713,{"_138":139,"_140":306},{"_126":293,"_167":-5,"_128":129,"_118":-5,"_130":10,"_131":14},[307]," when the first distance signal is registed, move the indicator smoothly with 0,5 seconds animation.\n",{},{"_91":300,"_98":312,"_32":313,"_101":314,"_103":104,"_105":26,"_106":107,"_108":315,"_110":111},"aaa2c8fc-1564-457f-9b04-e73acd4b589d",[283],{"_143":144,"_108":325},1718915434.977498,{"_138":139,"_140":323},{"_112":316,"_114":-5,"_118":-5,"_119":181,"_121":122,"_182":317,"_123":318,"_125":310,"_115":319,"_117":26,"_126":320,"_128":129,"_130":10,"_131":26,"_132":321},[],[186],"AAA",{"_28":134,"_135":322},"896e843cf8094528-TXL",[],[188],[324],"The provided Arduino sketch integrates ultrasonic distance sensing with MIDI output and controls an RGB LED strip using Adafruit NeoPixel library to visualize distance information. Here’s a breakdown of the main components and functionalities:\n\n### Components Used:\n- **Hardware:**\n - Ultrasonic sensor (HC-SR04) for distance measurement.\n - RGB LED strip (NeoPixel) to display visual feedback.\n - Arduino board (assumed to be compatible with Adafruit NeoPixel library).\n\n- **Software:**\n - **Libraries:**\n - `Adafruit_NeoPixel.h`: For controlling NeoPixel RGB LEDs.\n \n - **Functions and Structures:**\n - `MIDISend`: Sends MIDI messages to a serial port, controlling MIDI devices.\n - `setBrightness`: Adjusts the brightness of RGB colors for NeoPixel LEDs.\n - `interpolateRainbow`: Interpolates colors from a predefined rainbow gradient based on a given position.\n - `showDistanceOnLEDs`: Maps and displays distance on the LED strip, adjusting brightness and color based on distance.\n - `fadeIndicator`: Fades the LED strip's indicator lights in and out.\n\n### Sketch Breakdown:\n1. **Initialization (`setup()` function):**\n - Sets up pins (`trigPin` and `echoPin`) for ultrasonic sensor.\n - Initializes serial communication for MIDI output.\n - Initializes NeoPixel strip (`strip.begin()` and `strip.show()`).\n\n2. **Distance Sensing and LED Display (`loop()` function):**\n - **Distance Measurement:**\n - Uses ultrasonic sensor to measure distance (`HC-SR04` formula).\n - Computes distance in centimeters and adjusts MIDI output (`MIDISend`) based on distance.\n \n - **LED Visualization:**\n - `showDistanceOnLEDs`: Maps distance to LED strip, highlighting the current distance with brightness variations. Surrounding LEDs dim relative to the distance.\n\n - **Fading Effect:**\n - If no signal is detected for 3 seconds (`currentTime - lastSignalTime > 3000`), initiates fading effect (`fadeIndicator`).\n - Fades LEDs around the last detected distance indicator, creating a visual fade in and out effect.\n\n### Additional Notes:\n- **Color Handling:**\n - Predefined rainbow colors (`rainbowColors`) are interpolated based on the position along the LED strip to provide a gradient effect.\n \n- **Performance Considerations:**\n - Reduced delay (`delay(10)`) to increase sampling rate for distance measurement and visualization responsiveness.\n\n### Conclusion:\nThis sketch effectively integrates sensor input (distance) with visual feedback (LED strip) and MIDI output. It demonstrates the versatility of Arduino in combining various functionalities to create interactive and responsive projects. Adjustments can be made to customize behaviors, such as color gradients, fading effects, and MIDI controls, depending on specific project requirements.",{},{"_91":310,"_98":329,"_32":330,"_101":331,"_103":104,"_106":107,"_108":332,"_110":111},"b3235268-d521-4745-8f4f-2002b5f340f5",[300],{"_143":170,"_108":335},1718915425.305746,{"_138":139,"_140":333},{"_126":320,"_167":-5,"_128":129,"_118":-5,"_130":10,"_131":14},[334],"\n#include \n\n#define NUM_SENSORS 4\n#define LED_PIN 11 // Changed from 14 to 11\n#define NUM_LEDS 30\n\n// Sensor pins\nconst int trigPin = 5;\nconst int echoPin = 9;\n\nlong duration;\nint distance;\nfloat val = 0;\nint lastVal = 0;\nint lastDistance = 0;\nunsigned long lastSignalTime = 0;\nunsigned long fadeStartTime = 0;\nbool fading = false;\nbool fadeDirection = true; // true: fade in, false: fade out\nuint32_t lastColor = 0;\n\n#define CC 0xB\n#define CHANNEL_VOLUME 0x07\n\nAdafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);\n\n// Define rainbow colors\nuint32_t rainbowColors[] = {\n strip.Color(255, 0, 0), // Red\n strip.Color(255, 127, 0), // Orange\n strip.Color(255, 255, 0), // Yellow\n strip.Color(0, 255, 0), // Green\n strip.Color(0, 0, 255), // Blue\n strip.Color(75, 0, 130), // Indigo\n strip.Color(148, 0, 211) // Violet\n};\n\nvoid setup() {\n pinMode(trigPin, OUTPUT);\n pinMode(echoPin, INPUT);\n\n Serial.begin(115200); // Set the speed of the midi port to the same as we will be using in the Hairless Midi software\n strip.begin();\n strip.show(); // Initialize all pixels to 'off'\n}\n\ntypedef struct {\n unsigned int channel : 4; // second nibble : midi channel (0-15) (channel and status are swapped, because Arduino is Little Endian)\n unsigned int status : 4; // first nibble : status message (NOTE_ON, NOTE_OFF or CC (control change)\n uint8_t data1; // second byte : first value (0-127), controller number or note number\n uint8_t data2; // third byte : second value (0-127), controller value or velocity\n} t_midiMsg; // We call this structure 't_midiMsg'\n\nvoid MIDISend(uint8_t status, uint8_t channel, uint8_t data1, uint8_t data2) {\n t_midiMsg msg;\n msg.status = status & 0xF;\n msg.channel = (channel - 1) & 0xF; // channels are 0-based\n msg.data1 = data1 & 0x7F;\n msg.data2 = data2 & 0x7F;\n Serial.write((uint8_t *)&msg, 3);\n}\n\nuint32_t setBrightness(uint32_t color, float brightness) {\n uint8_t r = (uint8_t)(((color >> 16) & 0xFF) * brightness);\n uint8_t g = (uint8_t)(((color >> 8) & 0xFF) * brightness);\n uint8_t b = (uint8_t)((color & 0xFF) * brightness);\n return strip.Color(r, g, b);\n}\n\nuint32_t interpolateRainbow(float position) {\n int numColors = sizeof(rainbowColors) / sizeof(rainbowColors[0]);\n float segment = 1.0 / (numColors - 1);\n int idx1 = position / segment;\n int idx2 = min(idx1 + 1, numColors - 1);\n float factor = (position - (idx1 * segment)) / segment;\n\n uint32_t color1 = rainbowColors[idx1];\n uint32_t color2 = rainbowColors[idx2];\n\n uint8_t r1 = (color1 >> 16) & 0xFF;\n uint8_t g1 = (color1 >> 8) & 0xFF;\n uint8_t b1 = color1 & 0xFF;\n\n uint8_t r2 = (color2 >> 16) & 0xFF;\n uint8_t g2 = (color2 >> 8) & 0xFF;\n uint8_t b2 = color2 & 0xFF;\n\n uint8_t r = r1 + (r2 - r1) * factor;\n uint8_t g = g1 + (g2 - g1) * factor;\n uint8_t b = b1 + (b2 - b1) * factor;\n\n return strip.Color(r, g, b);\n}\n\nvoid showDistanceOnLEDs(int cm) {\n int ledIndex = constrain(cm - 1, 0, NUM_LEDS - 1); // Calculate the LED index based on the distance\n int startLED = max(0, ledIndex - 2); // Start of the indicator (5 LEDs total)\n int endLED = min(NUM_LEDS - 1, ledIndex + 2); // End of the indicator\n\n strip.clear(); // Clear previous display\n\n float brightness = map(cm, 0, 30, 10, 100) / 100.0; // Map the distance to brightness (10% to 100%)\n\n // Light up the indicator LEDs with varying brightness\n for (int i = startLED; i <= endLED; i++) {\n float position = (float)i / (NUM_LEDS - 1);\n uint32_t color = interpolateRainbow(position);\n\n float ledBrightness = brightness;\n if (i == ledIndex) {\n ledBrightness = brightness; // Center LED at mapped brightness\n } else if (i == ledIndex - 1 || i == ledIndex + 1) {\n ledBrightness *= 0.3; // Adjacent LEDs at 30% of the mapped brightness\n } else {\n ledBrightness *= 0.1; // All other LEDs at 10% of the mapped brightness\n }\n strip.setPixelColor(i, setBrightness(color, ledBrightness));\n }\n strip.show(); // Update the LED strip to show the new colors\n\n lastDistance = cm; // Update the last distance used\n}\n\nvoid fadeIndicator(int startLED, int endLED) {\n unsigned long currentTime = millis();\n float fadeDuration = 1000.0; // 1 second for each half of the cycle\n float progress = (currentTime - fadeStartTime) / fadeDuration;\n\n if (progress >= 1.0) {\n fadeStartTime = currentTime;\n fadeDirection = !fadeDirection; // Reverse the fade direction\n progress = 0.0; // Reset progress\n }\n\n float brightness = fadeDirection ? progress : 1.0 - progress; // Calculate the brightness\n\n for (int i = startLED; i <= endLED; i++) {\n float position = (float)i / (NUM_LEDS - 1);\n uint32_t color = interpolateRainbow(position);\n strip.setPixelColor(i, setBrightness(color, brightness));\n }\n strip.show();\n}\n\nvoid loop() {\n digitalWrite(trigPin, LOW);\n delayMicroseconds(2);\n digitalWrite(trigPin, HIGH);\n delayMicroseconds(10);\n digitalWrite(trigPin, LOW);\n\n duration = pulseIn(echoPin, HIGH);\n distance = duration * 0.034 / 2;\n\n unsigned long currentTime = millis();\n\n // Check if a signal is detected\n if (distance < 31) {\n val = (distance * 4.2) * -1;\n if (val != lastVal) {\n MIDISend(CC, 1, CHANNEL_VOLUME, val);\n lastVal = val;\n }\n showDistanceOnLEDs(distance);\n lastSignalTime = currentTime; // Update the last signal time\n fading = false; // Stop fading\n } else if (currentTime - lastSignalTime > 3000) { // No signal detected for 3 seconds\n if (!fading) {\n fadeStartTime = currentTime;\n fading = true;\n 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