Flood surveillance and alert system an advance the IoT Flooding is one of the major disasters occurs in many areas of Thailand. Such an event resulting in various damages to life, property, mental state and economy of the country. So, if the concerned person can know the water information and related parameters in the areas of realtime flood risk, it allows the alarming act effectively and can reduce the damage caused. This paper proposed the flood surveillance and alert system an advance the Internet of Thing (IoT) technology to bring new products such as disaster alerts. The work of the system is divided into 2 parts: The first part is the client equipment installed in the flood risk area consists of equipment to measure the rate of rainfalls, water level, and water flow rate. The measurement data obtained from all devices will be sent to the cloud server via a wireless network. In addition, the flood surveillance and alert system get the important data value from the Thai Meteorological Department and Royal Irrigation Department Website sent to the cloud server for processing together with the value received from the client equipment. The second part is the display and notification. The flood surveillance and alert system designed to be able to display data values received from the client device via the blink and line applications. This system will help the flood warning system to be more effective and reduce losses that occur to people in floodrisk areas.

Design of IoTBased River Water Monitoring Robot Data Transmission Model Using Low Power Wide Area Network (LPWAN) Communication Technology River water monitoring system is one of the efforts as a contribution to control the pollution andor damage of the Citarum watershed in Indonesia based on Presidential Decree Number 15 of 2018. Monitoring of Citarum River water quality is essential because it is to know its condition. Despite that, regular monitoring requires water samples to be taken to the laboratory to be tested. Therefore it is not realtime and wasteful of energy. In this paper, a design of IoTbased river water quality monitoringsystem using LPWAN communication technology will be proposed so that monitoring points on the Citarum watershed can be monitored in realtime and the results of monitoring data will be stored in the server for data logging. A test about communication range is performed with four nodes and one gateway with LoRa transceiver paired with Arduino boards, as LPWAN communication method, to be able to exchange information in terms of hardware and implement network mesh topologies to widen monitoring points in terms of software. It is shown from the test result that the communication range for the transmission between node to node or node to gateway reaches a maximum of 500 m close on the surface of the water.