Seamless Connectivity: Introducing the NE2-S1W Serial to Ethernet/WiFi Module
In the world of Industrial IoT, reliability and flexibility are non-negotiable. Whether you are connecting a PLC on a factory floor or a sensor in a remote location, your data needs a stable path to the cloud.
The NE2-S1W is an industrial-grade single serial port server module designed for bidirectional transparent data transmission between serial devices and Ethernet or WiFi networks. With integrated Modbus and IoT gateway modes (MQTT/HTTP), it removes the complexity of protocol conversion, allowing you to focus on your core system logic.
Compact Design & Easy Integration
The NE2-S1W features a compact 1.27mm stamp-hole (castellated hole) interface, making it easy to embed directly into your PCB design. For developers looking to hit the ground running, we offer the NE2-S1W-TB Evaluation Kit, which includes:
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Pre-soldered NE2-S1W module.
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Built-in USB-to-TTL circuit (no external converters needed).
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External reset/restart buttons and LED status indicators for real-time monitoring.
Key Technical Features
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Dual Networking: Supports 10/100M Ethernet (Auto-MDI/MDIX) and 2.4G WiFi.
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Flexible Access Modes: Three modes—Ethernet only, WiFi only, or Auto-Switching (Ethernet priority).
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Dual-Socket Support: Each socket supports TCP Server/Client, UDP Server/Client, HTTPC, and MQTTC.
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IoT Cloud Integration: Ready-to-use support for Alibaba Cloud, Baidu Cloud, OneNET, Huawei Cloud, and standard MQTT 3.1.1 servers.
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Advanced Modbus Gateway: Includes Simple Conversion, Multi-host Mode, Storage Gateway, Configurable Gateway, and Active Upload Mode.
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Industrial Reliability: Features Keepalive mechanisms, disconnection reconnection, timeout restarts, and industrial-grade hardware standards.
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Configuration Options: Easily configure via PC software tools, a built-in Web UI, or AT commands.
Intelligent Networking Modes
The NE2-S1W is uniquely versatile because it combines wired and wireless connectivity into one small footprint.
1. Ethernet Only
The device connects solely via Ethernet (Default Static IP: 192.168.3.7). In this mode, the WiFi acts as an AP (Access Point). You can simply connect your phone or laptop to the module's WiFi and access 192.168.10.1 in your browser to configure settings.
2. WiFi Only (STA)
The module connects to your network as a Station (STA) via 2.4G WiFi. In this mode, DHCP is enabled by default to ensure quick integration into existing wireless infrastructures.
3. Auto-Selection (Ethernet Priority)
This is the ultimate "fail-safe" mode. The module prioritizes the Ethernet connection. You can set up to three "Ping" target addresses. If the Ethernet link fails to ping these addresses, the module will automatically switch to WiFi to ensure your data transmission remains uninterrupted.
Note: In Auto-Selection mode, the system utilizes TCP/HTTP/MQTT Client modes. The switching mechanism is triggered based on user-defined intervals (60s to 65,535s) to maintain maximum uptime.
Why Choose NE2-S1W?
Compared to traditional single-network serial servers, the NE2-S1W offers the best of both worlds. It provides a high-speed wired connection where cables are available and switches seamlessly to WiFi in mobile or hard-to-wire environments.
From Virtual Serial Port support to FOTA (Firmware Over-The-Air) updates, the NE2-S1W is designed to be a future-proof bridge for your legacy serial equipment.