void testF() {
  uint32_t distance = 100;
  char buf[36];
  sprintf(buf, "{\"data\" : \"zAds1SDad\",\"functionality_module\" : \"functional\",\"data_sensor\" : \"%d\"}\n", distance);
  Serial.println(buf);
}

void setup() {
  Serial.begin(115200);
  // put your setup code here, to run once:
}

void loop() {
  testF();
  delay(100);
}