def getListDoorSensors():
    dao = DAO()
    sensors = dao.getListDoorSensors()
    d_list = []
    for sensor in sensors:
        d_list.append({'id_sensor': sensor.id, 'name' : sensor.name,'pin' : sensor.pin_number, 'current' : sensor.current_value ,'timestamp' : sensor.timestamp})
    return json.dumps(d_list)