## Sensor data API
{
  "voltage": 12.43,
  "current": 15.2732,
  "error_code": 2,
  "level_percent":73.843,
  "level_cm": 281.3,
 "top_level_cm": 281.3,
 "bottom_level_cm": 281.3,
  "liter": 24000
}