void setup() {
  Serial.begin(9600);
  randomSeed(analogRead(0)); // Seed the random number generator
}

void loop() {
  // distance = 33.12;
  float distance = random(20000, 30000) / 100.0; 
  String jsonOutput = "{\"distance\":" + String(distance, 2) + "}";
  Serial.println(jsonOutput);
  delay(1000);

}