With a rapid increase in the number of IoT devices, the network access protocols of the devices also become diversified, leading to the need for IoT platforms that support heterogeneous network access. In each area or with different applications, the communication solution as well as the measurement and control for peripheral devices is different. Current IoT systems are mainly built for a specific problem, lacking the ability to expand the connection network and with different peripheral devices, therefore a costly investment and time to build the system, and at the same time, the ability to work is less reliable. The article proposes a flexible IoT solution that can be readily applied to outdoor systems, such as smart agriculture, smart lighting, and smart traffic; thereby suggesting a flexible application with different infrastructures for each application with high working quality, scalability, time and cost-savings.
In the industrialized countries such as Japan, USA, Europe... science and technology actually become the important production. But for developing countries, science and technology applications meet many difficulties in practice, such as no comprehensive development in the industries, small-scale producing, redundant manual labor. In addition, the economic life is low, … So it is possible to appear new problems, what can be not noted in other developed countries, and it needs a creative, certain activity in research and its applications. The management and surveillance transport means are the typical examples. When the transportation means do not run on required road, speed may cause the serious consequences of human and material. However, the use of solutions and systems available in developed countries is not feasible as mentioned above. The article introduces some experiences and results of the design and manufacture equipment in Vietnam: monitoring and warning speed for long distance vehicles, monitoring and collecting traffic data, and monitoring system for transport means in open-cast mining. 2 SOLUTIONS FOR TRANSPORT MEANS SURVEILANCE PROBLEM 2.1 The speed monitoring and warning system for longdistance buses In Vietnam, the passengers long-distance transport buses have some following drawbacks, such as: going through residential areas with limited speed, different transportation companies works at the same time on the same line causes over-speed driving to scramble for passengers. The amount of accidents for this reason takes 50% of total accident number on the roads (Photo 1). So it is actuated to install the black box for speed monitoring and warning on the buses [3]. The main functions of this system are following: defining the vehicle location from speed sign on the road, comparing actual vehicle speed with allowed speed in this section and warning the driver, passengers and management center in the case of overspeeding or taking a wrong road situation. There are two forms of speed signs in Vietnam: fixed and mobile sign. The fixed signs are used at the city' entrances or curved sections, etc… and the mobile signs are often as maintenance. For solving the proposed problem it is necessary to apply some new technologies: GPS technology for defining vehicle location and speed, GIS technology for calculating location in the digital map, GPRS/GSM technology for data transmission, RF technology for information transmission between vehicle and signs on the
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