New Arrivals:EWM181-Z20 series ZigBee ad hoc network module

Product Introduction of EWM181-Z20 series

The EWM181-Z20SX and EWM181-Z20SP is a compact 2.4GHz ZigBee3.0-to-serial wireless module designed and manufactured by Ebyte. It features a surface-mount package, maximum transmission power of 20dBm, and 1.27mm pin spacing. Pre-installed with self-organizing network firmware, it is simple to use and primarily suitable for data transmission applicatio

Feature Functions

Automatic Networking: The coordinator automatically forms a network upon power-up; end devices and routers automatically search for and join the network.
Network Self-Healing: If an intermediate node is lost, other nodes automatically rejoin or maintain the original network (isolated nodes rejoin the original network, and routing nodes retain the original network); if the coordinator is lost but non-isolated nodes remain, the coordinator can rejoin the network after restarting.
Ultra-Low Power Consumption: In end-device mode, the module can be set to low-power mode with user-adjustable sleep time; standby current in low-power mode is less than 2uA. Messages are received within the user-defined timeframe as long as parent node data is retained.
Automatic Retransmission: In unicast mode, messages are automatically retransmitted up to 3 times at 6-second intervals if transmission to the next node fails.
Automatic Routing: Supports network routing; routers and coordinators handle data routing, enabling multi-hop networking.
Encryption Protocol: Adopts AES 128-bit encryption to secure the network and prevent eavesdropping.
Serial Configuration: Built-in serial commands allow parameter configuration and function checking via serial port.
Multi-Type Data Communication: Supports broadcast, multicast, and unicast (point-to-point) transmission, with additional transmission methods available in broadcast and unicast modes.
Multiple Operating Modes: Transparent transmission, semi-transparent transmission, and protocol mode, switchable by the user.
Channel Adjustment: Supports 16 channels (11–26) corresponding to 2405–2480MHz frequencies.
Network PAN_ID Modification: PAN_ID can be customized or automatically selected for network joining.
Serial Baud Rate Adjustment: User-configurable baud rate up to 230400, with default settings of 8 data bits, 1 stop bit, and no parity.
Short Address Search: Derive short addresses using the unique MAC address of modules in the network.
Command Format Switching: Supports AT and HEX command modes for easy configuration and switching.
Module Reset: Remotely reset via serial commands.
Factory Reset: Restore default settings via serial commands.
Network Node Management: The coordinator records and enumerates network nodes, allowing deletion of unwanted nodes for automated device management.
Integrated Design: Coordinator, router, and end-device modes switchable via commands.
Dual Serial Ports: Both ports support data transmission, AT commands, and HEX commands, operating independently without interference.

ZigBee Introduction

ZigBee is a short-range, low-complexity, low-power, low-data-rate, and low-cost bidirectional wireless communication technology. ZigBee networks consist of three logical device types: Coordinator, Router, and End-Device. A network comprises one Coordinator, multiple Routers, and multiple End-Devices, supporting star, tree, mesh, or hybrid MESH topologies.

Coordinator
Initiates the network as the first device, selecting a channel and PAN ID (Personal Area Network ID). It also assists in establishing security layers and application-layer bindings. Once configured, the Coordinator functions like a Router but remains necessary for new device join requests.

Router
Enables network access for other devices, supports multi-hop routing, and facilitates communication with sleeping child end devices. Typically mains-powered for continuous operation, though battery-powered operation is possible in tree-network periodic wake-up modes.

End-Device
No responsibility for network maintenance; can sleep/wake and is typically battery-powered.

Application Scenarios