Chengdu Ebyte Electronic Technology Co.,Ltd..
E52-400/900NW22S User Manual
Copyri
Copyright ©2012–2023, Chengdu Ebyte Electronic Technology Co.,Ltd.
1
I.Product Description
1.1 Product Introduction
E52-400/900NW22S is a wireless serial port LoRa MESH networking module based on LoRa spread spectrum technology. The
maximum output power is +22 dBm, the maximum air rate can reach 62.5K, and the maximum supported baud rate is 460800 bps. The
operating frequency range of the E52-400NW22S module is 410.125~509.125 MHz (default 433.125 MHz), and the operating
frequency range of the E52-900NW22S module is 850.125~929.125 MHz (default 868.125 MHz).
E52-400/900NW22S adopts the new LoRa MESH networking technology, which has the functions of
decentralization, self-routing, network self-healing, multi-level routing, etc. It is suitable for smart home and industrial
sensors, wireless alarm security systems, building automation solutions, Smart agriculture and other application
scenarios.
E52-400NW22S
E52-900NW22S
1.2 Function description
The LoRa MESH network adopts a decentralized structure. The entire network is composed of only two types of
nodes: terminal nodes and routing nodes. There is no need for a central node or coordinator to participate in network
management; users can also build a MESH network using only routing nodes. Routing nodes are similar to terminal
nodes, but terminal nodes do not have routing functions. Terminal nodes are generally deployed at the edge of the
network and are generally used to design low-power nodes, but currently do not support low-power functions. Routing
nodes need to continuously receive data from the network for routing updates and data forwarding, so routing nodes
cannot be used as low-power nodes.
CSMA avoidance technology is adopted in the MESH network. The CSMA avoidance mechanism can prevent
nodes from sending wireless data at the same time as much as possible and reduce the probability of data collision errors.
The routing node will automatically collect information from surrounding nodes to form a multi-hop communication
network; when a link fails or is abnormal, the routing node will re-establish a new path after several consecutive
communication failures.
The network supports four communication methods, Unicast, Multicast, Broadcast and Anycast. Users can choose
different communication methods according to different application scenarios. Among them, unicast and broadcast are
the simplest and most basic communication methods. In unicast mode, routes will be automatically established and
request responses will be returned to determine the data transmission path; in broadcast mode, all routing nodes will start
