LORA WAN network installation
During the work on measurements and research of losses on the Project "Development of a mathematical model of the water supply and sewerage system of Gradiška with a plan for their development", and after analyzing the results, it was determined that one of the types of losses and errors in measuring water meters. The reason for that is their age, ie longer service life without their rehabilitation and calibration.
The next segment of losses is that a certain number of consumers pay for water in a lump sum, ie without owning a water meter. In the further continuation of the realization of the conclusions from the Project, it was necessary to procure a certain number and type of water meters. As an experimental project, the proposal by "NMAqua" was to procure a water meter that will have the ability to transmit data, so without the need to read the situation. The whole process takes place automatically, ie according to the needs of the user, the reading is performed within one month.
Installation and programming of water meters
A solution has been found in water meters that use the LoRaWAN network architecture - Ultrasonic water meter QALCOSONIC W1.
LoRaWAN ™ is a “Low Power Wide Area Network” (LPWA) network intended for operation in wireless battery-powered communication in a regional, national or global network.
LoRa (Long Range) is a low power wide area network (LPVAN) technology. It is based on broad spectrum modulation techniques, derived from a wide range of chirp technology
The LoRaWAN network architecture is typically set up in a star-of-stars topology in which the gateway is a transparent bridge when forwarding messages between end devices and a central network server.
Communication between end devices and gateways is widespread on different frequency channels and data rates. Due to the spectrum technology, communication with different data rates does not interfere with each other
LoRa devices and the open LoRaWAN® protocol offer an efficient, flexible and cost-effective solution to real-world problems in rural and indoor use cases, where cellular and Wi-Fi / BLE networks are based on inefficiencies.
As part of the pilot project, eight such water meters were procured and installed at consumers at different locations and distances from repeaters, as well as visual reading.
Water meters have the ability to work with three data transmission technologies: LoRa, NFC and M-Bus
After that, it was necessary to program the water meter for the LoRaWAN network, ie enter the data necessary for smooth operation and establish communication with the server on this platform, which was done by the "Nmaqua" team.
During December, the programming interval is one hour.
After a certain period, it was noticed that water meters at a very remote location, as well as a water meter installed in the basement, have difficulty in communication.
In the coming period, several more repeaters will be installed to cover the wider area of the city.
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