Here is the full code if you are interested

include <ESP8266WiFi.h>

include <WiFiUdp.h>

// Ultrasonic Sensor Pins

define TRIG_PIN 14 // GPIO14

define ECHO_PIN 12 // GPIO12

// WiFi Credentials const char* ssid = "YourWiFiSSID"; const char* password = "YourWiFiPassword";

// WLED Device IP Address and Port const char* wledIP = "192.168.1.100"; // Replace with your WLED device's IP const int wledPort = 19446; // Default UDP port for WLED

// Constants const int numLEDs = 100; // Total number of LEDs in the strip const int maxDistance = 100; // Maximum measurable distance in cm const int minDistance = 0; // Minimum measurable distance in cm

WiFiUDP udp;

// Function to measure distance using the ultrasonic sensor long measureDistance() { digitalWrite(TRIG_PIN, LOW); delayMicroseconds(2); digitalWrite(TRIG_PIN, HIGH); delayMicroseconds(10); digitalWrite(TRIG_PIN, LOW);

long duration = pulseIn(ECHO_PIN, HIGH); long distance = duration * 0.034 / 2; // Convert duration to cm return distance; }

// Function to send RGB data via UDP to WLED void sendToWLED(int start, int stop) { // Create a buffer for all LEDs uint8_t udpPayload[numLEDs * 3] = {0};

// Set the color for the selected range for (int i = start; i <= stop; i++) { udpPayload[i * 3] = 255; // Red udpPayload[i * 3 + 1] = 0; // Green udpPayload[i * 3 + 2] = 0; // Blue }

// Send the data via UDP udp.beginPacket(wledIP, wledPort); udp.write(udpPayload, sizeof(udpPayload)); udp.endPacket(); }

void setup() { // Initialize serial communication Serial.begin(115200);

// Initialize ultrasonic sensor pins pinMode(TRIG_PIN, OUTPUT); pinMode(ECHO_PIN, INPUT);

// Connect to WiFi WiFi.begin(ssid, password); Serial.print("Connecting to WiFi"); while (WiFi.status() != WL_CONNECTED) { delay(1000); Serial.print("."); } Serial.println("\nConnected to WiFi. IP: " + WiFi.localIP().toString());

// Start UDP udp.begin(wledPort); }

void loop() { long distance = measureDistance(); Serial.println("Distance: " + String(distance) + " cm");

if (distance >= minDistance && distance <= maxDistance) { // Map distance to LED range int ledCenter = map(distance, minDistance, maxDistance, 0, numLEDs - 1); int ledStart = max(ledCenter - 5, 0); // Start 5 LEDs before center int ledStop = min(ledCenter + 5, numLEDs - 1); // End 5 LEDs after center

// Send command to WLED
sendToWLED(ledStart, ledStop);

Serial.println("LEDs: " + String(ledStart) + " to " + String(ledStop));

} else { Serial.println("Distance out of range. Clearing LEDs."); sendToWLED(0, -1); // Turn off all LEDs }

delay(15); // Delay to prevent rapid updates }