With its radio technology, our WSNet solution offers decisive advantages in the areas of range, interference immunity and power consumption. Physically, WSNet is based on LoRa™ technology, but represents a solution tailored by WSN for the respective application. In WSNet, only as much energy is used for sending and receiving data as is actually required.
The advantages of the IIoT solution at a glance:
Thanks to the robust LoRa™ wireless technology, good coverage and penetration of even large production halls is achieved in an industrial environment. The radio technology is a development of the company Semtech Corporation. In contrast to WLAN, no large number of routers are required. A single LoRa™ gateway is capable of reliably and securely managing hundreds of sensors across thousands of square meters.
It is possible to use different virtual channels at the same time without the transmissions interfering with each other due to the “spread spectrum technology” (frequency spreading) used by LoRa™. The data rates, the frequencies and the transmission power of the end devices can be set individually. This technology is ideal for use inside buildings and radio-critical environments (e.g. in reinforced concrete buildings) due to the interference immunity and the excellent penetration.
The sensor technology of the solution consists, among other things, of mechanical or optical switches for shelves and roller conveyors, occupancy indicators for pallets and lattice boxes, level indicators for screw bunkers, etc. The battery-operated sensors are equipped with a low-power LoRa radio module and are characterized by their robustness and very long battery life.
All messages / commands follow the WSN Avro specification for the most efficient data transfer.
The Message Management Center (MMC) manages WSNet end devices and communicates with them via gateways. Communication with applications takes place via standard IP connections. It can be operated both on the gateway and independently on a PC.
The MMC has a so-called dashboard, i.e. a user interface for central monitoring and control of all end devices that are registered at the gateway. The dashboard allows direct communication with the end devices. It also logs all incoming data and events.
Our MMC supports the firmware update for the end devices via the dashboard. These can receive new firmware “over-the-air” either individually or via multicast. For security reasons, only signed firmware can be transferred to end devices.
Node-RED as a graphical tool for creating message histories
Node-RED Message Flow (example representation)
Another key part of the MMC is the use of Node-RED. A graphical tool for creating message threads. It allows end devices to connect to application interfaces, to send e-mails or tweets based on events or simply to conveniently monitor end devices. Node-RED supports MQTT, a real-time M2M message protocol.
Node-RED Message UI (example display)
The wireless IoT applications are connected to the respective operational systems and integrated into the company processes. For this purpose, an inventory is carried out on site in order to adapt the solution concept, the components and the software to the local requirements. The turnkey solution also includes installation, commissioning, training and support.