EBYTE's EWD95M—LN series Micro DIN-rail DTU are now available! To meet the needs of different application scenarios, a variety of wireless data transmission radio products have been launched, adopting different communication technologies and providing diversified solutions. The radio provides transparent RS485/RS232 interfaces, adopts a plastic shell and a rail-mounted structure, which is small in size and convenient to use. It can be widely used in Internet of Things, smart home, industrial control, environmental monitoring, building automation and other fields. Various models of products are being launched one after another, welcome to consult and learn more!
Product Overview of EWD95M-LN series
The EWD95M-400LNxx(xxx) are wireless data radios based on the standard LoRaWAN protocol, interoperable with standard LoRaWAN networks. They ship with standard LoRaWAN firmware and operate in the 410-510MHz frequency band. The EWD95M-900LNxx(xxx) operate in the 850-930MHz frequency band and provide transparent RS485/RS232 interfaces.
Supports LoRaWAN 1.0.3 EU433/CN470 standards or LoRaWAN 1.0.4 EU868, US915, AU915, AS923, IN865, KR920, and RU864 standards, Class-A and Class-C node types, and both ABP and OTAA network access methods.
About LoRaWan protocol
The LoRaWAN protocol standard is a low-power WAN standard based on the open-source MAC layer protocol released by the LoRa Alliance, an open, not-for-profit organization led by Semtech in March 2015.The LoRaWAN protocol supports a star-shaped network topology, and its network components mainly include: LoRaWAN nodes, gateways, servers (including Network Server, Network control, Application Server), and base stations. LoRaWAN protocol supports star-
shaped network topology, and its network composition mainly includes: LoRaWAN nodes, gateway (Gateway), Server (including Network Server, Network control, Application Server).
LoRaWAN categorizes LoRaWAN nodes into A/B/C categories:
Bidirectional Transmission Terminal (Class A):
Class A terminals realize bi-directional transmission by following two short downlink reception windows immediately after each uplink. The terminal schedules transmission time slots based on its own communication needs, with small variations on a random time basis (i.e., ALOHA protocol). This Class A operation provides the application with the lowest power consumption terminal system, requiring the application to perform the server's downlink transmission only a short time after the terminal's uplink transmission. Downlink transmissions made by the server at any other time have to wait for the terminal's next uplink.
Delineate the bidirectional transmission terminals that receive the time slots (Class B):
Class B terminals will have more receive time slots. In addition to the random reception windows of Class A, Class B devices will open other reception windows at specified times. In order for a terminal to open a receive window at a specified time, the terminal needs to receive a time-synchronized beacon from the gateway. This allows the server to know when the terminal is listening.
Bidirectional transmission terminals that maximize the reception time slot (Class C):
Class C terminals basically keep the receive window open all the time and only close it briefly when transmitting.Class C terminals will consume more power than Class A and Class B, but at the same time have the shortest latency for downlinking from the server to the terminal.
Note: The EWD95M-xxxLN22(xxx) supports both Class A and Class C device types.
