Introduction

In industrial wireless communications, achieving stable, long-distance simultaneous transmission of high-definition video and critical data has long been a major challenge for engineers. Traditional split solutions — one video transmission module for video and one data transmission module for data — not only increase hardware costs and consume valuable PCB space, but also introduce the risk of mutual interference between the two modules.

Moreover, many application scenarios (such as drone inspection, smart security, and remote control) require devices to deliver reliable bandwidth of up to 16Mbps for video transmission, while also needing a low-latency, high-reliability data link for sending control commands.

EBYTE introduces the EWD611 series high-power video + data integrated radio, purpose-built to solve this core pain point. It perfectly merges high-speed video transmission and reliable data communication into a single device, providing engineers with an efficient "two-in-one" wireless communication solution

Product Overview: Three "Long-Distance All-Rounders" with Different Strengths

The EWD611 series is Ebyte's 2W high-power video + data integrated radio. It delivers a maximum transmission rate of 16Mbps, enabling simultaneous transmission of 4 channels of 1080p video, and supports Ethernet + serial port transparent transmission simultaneously — a benchmark product for long-distance wireless video and data communication.

The EWD611 series includes three core models:

Key Selling Points

• Video + Data Integrated: A single device supports both HD video (up to 4 channels of 1080p) and critical data (serial/Ethernet) wireless transmission — no more separate module designs.

• Ultra-High Speed: Up to 16Mbps transmission rate, enough to stream multiple HD video channels smoothly.

• Dual Interface Transparent Transmission: Supports Ethernet (RJ45) and Serial (RS485) transparent data transmission simultaneously, flexibly adapting to different devices.

• Flexible Networking: Supports star topology (up to 31 slave nodes), relay networking, and other topologies for wide-area coverage.

• One-Button Pairing: Master/slave mode switching is simple; use the PAIR button for one-key pairing.

Features and Model Comparison

Common Features Across All Three Models

Video + Data Integrated Design:

• Video Transmission: Supports up to 16Mbps transmission rate, enabling simultaneous wireless transmission of 4 channels of 1080p video.

• Data Transparent Transmission: Supports dual-interface transparent transmission via RJ45 Ethernet and RS485 serial port, meeting both video surveillance and data acquisition needs.

Powerful RF Performance:

• 33dBm (2W) high-power version (868/915NW33) and 20dBm (0.1W) standard power version (900NW20), covering different distance requirements.

• Under ideal conditions (clear open area, 5.0dBi antenna gain, 1m antenna height), the 33dBm version achieves a maximum communication range of 2km.

Flexible Networking Capabilities:

• Star Topology: A single master supports up to 31 slave nodes (868/915NW33) or 8 slave nodes (900NW20).

• Relay Networking: Supports relay functionality for further extending coverage.

Simple Operation & Configuration:

• One-Button Pairing: The PAIR button on the device enables quick master-slave pairing.

• Universal AT Commands: Rich AT command set for parameter configuration and debugging.

Rich Interfaces & Indicators:

• Standard RJ45 Ethernet interface (100M).

• Standard 3.81mm terminal block for RS485 and power.

• SMA-K antenna connector (male, internal bore, 50Ω impedance).

• 4 function LEDs: PWR (Power), LINK (Link), RSSI1/RSSI2/RSSI3 (Signal Strength).

Model Comparison

Key Differences Explained

• Frequency Band Differentiation: The two 33dBm versions are designed for the European 868MHz and North American 915MHz ISM bands respectively, while the 20dBm version operates across a wider band (850~930MHz) for broader compatibility.

• Power & Range: The 33dBm (2W) version delivers 20 times the transmit power of the 20dBm (0.1W) version, yielding 2 times the communication range (2km vs 1km) — a classic trade-off between "long distance" and "low cost."

• Network Capacity: The 33dBm version supports up to 31 slave nodes, while the 20dBm version supports only 8. For projects requiring large-scale networking (e.g., multiple sensor nodes in a factory), the 33dBm version is the better choice.

Selection Guide

Technical Specifications

Core RF Parameters

Electrical & Hardware Parameters

Factory Default Parameters

Application Scenarios

Scenario ①: Drone/UGV Remote Video Inspection System

Pain Point: Drones/UGVs need to transmit multiple HD video streams from onboard cameras back to the ground station in real time, while the ground station needs to upload control commands (e.g., flight parameters, gimbal angles).

Solution: Install one EWD611 at the ground station (as master) and one on the drone/UGV (as slave). The device connects to the camera and flight controller via Ethernet, enabling bidirectional simultaneous transmission of video and control commands. The 33dBm high power ensures a stable link within 2km.

Scenario ②: Factory Automation Production Line Remote Monitoring

Pain Point: Factory managers need to remotely view real-time HD video from multiple key workstations on the production line from their office, while also acquiring sensor data (e.g., temperature, output, fault codes) from the line.

Solution: The EWD611 acts as a wireless relay — one end connects to an HD camera via Ethernet, the other connects to the production line PLC via RS485. Managers can view both video streams and device data simultaneously over the wireless network, enabling remote visual monitoring.

Scenario ③: Temporary Communication for Large Events / Emergency Rescue

Pain Point: At sports venues, fire scenes, or rescue sites, a wireless video surveillance + data communication system independent of fixed networks needs to be deployed quickly.

Solution: Multiple slave nodes (each with a camera and sensor) connect to one master via star topology. All video data converges at the master, enabling rescue command center computers or tablets to view the scene in real time and send commands. One-button pairing and hour-level deployment speed are exactly what emergency scenarios demand.

Scenario ④: Smart Agriculture & Forestry Monitoring

Pain Point: In vast farmlands or forests, remote monitoring of farm machinery operations, crop growth, and wildlife activity is needed.

Solution: The EWD611's 2km communication range and 16Mbps high data rate easily cover large farmland areas. Relay functionality can further extend coverage. The device is easy to install with no Ethernet cabling required — ideal for distributed deployment.

EBYTE Core Advantages

FAQ

Q1: Why is my actual transmission distance far less than the rated 2km/1km?

A: The rated distances (2km/1km) are measured under ideal open-area conditions. In real-world applications, distance is affected by:

• Supply Voltage: The manual explicitly states that voltage below 12V reduces transmit power. Ensure a 12V power supply is used, especially for the 33dBm version, which draws up to 2A at 5V and may experience voltage drop.

• Antenna Factors: Use a high-quality, well-matched antenna (SMA connector, 50Ω impedance, gain ≥5.0dBi recommended). Metal objects near the antenna or mounting inside a metal enclosure will severely attenuate the signal.

• Environmental Obstruction: Trees, buildings, and hills significantly shorten communication range. Seawater and ground also absorb radio waves.

• Device Interference: Nearby co-channel or strong interference signals increase the bit error rate.

• Antenna Height: The manual specifies a test condition of "1m antenna height." Higher antenna placement helps achieve longer distances.

Q2: Besides distance, what causes a high bit error rate?

A: High bit error rate is typically related to:

• Co-Channel Interference: Other devices operating on the same frequency nearby. Try changing the channel or frequency point to avoid interference.

• Power Quality: Unstable power or excessive ripple can cause communication errors. Always provide a stable, clean DC power supply.

• Cable Issues: Poor-quality or excessively long antenna extension cables or feeders can also degrade communication quality.

Q3: How to protect the radio from damage or unstable communication?

A: Strictly follow these guidelines:

• Power Supply Check: Ensure voltage is within the recommended range (e.g., 12V recommended for the 33dBm version). Exceeding the maximum (24V) may permanently damage the radio.

• Electrostatic Protection: RF modules are sensitive to static electricity. Take anti-static precautions (e.g., anti-static wrist strap) during operation.

• Humidity Control: Avoid excessively high humidity environments, as some components are moisture-sensitive.

Q4: How to quickly complete one-to-one pairing?

A: Based on the manual's "1-to-1 connection as a bridge between two PCs" example:

1. Prepare two radios with antennas installed.

2. Connect each radio to a PC via Ethernet cable.

3. Power on — the Ethernet port LED will light up, and the PC network interface will show "Unknown network."

4. Manually set both PCs to static IPs on the same subnet (e.g., 192.168.1.100 and 192.168.1.200), and disable the firewall.

5. Using a network debugging assistant (e.g., NetAssist), one PC starts a TCP Server, and the other connects to the Server's IP and port.

Q5: How to set up one-to-many (star) networking?

A: One-to-many star networking configuration:

1. Set one device as master mode (AP) and the others as slave mode (STA).

2. Use AT commands to set the master's SSID (note: different masters should have different SSIDs).

3. Configure slaves via AT commands to connect to the master's SSID (same as the network master's SSID).

4. Set all devices to the same encryption method (e.g., WPA-PSK) and key.

5. One master node supports up to 8 (900NW20) or 31 (868/915NW33) slave devices.

Q6: How to configure the radio via the Ethernet port?

A: The manual provides detailed steps (Windows PC):

1. Connect the PC to the radio's ETH port via Ethernet cable.

2. Set the PC's IP to a static IP (e.g., 192.168.1.96), ensuring it is on the same subnet as the radio.

3. In the command line (CMD), use the network configuration tool (nettools) or access the radio's IP via a web browser.

4. Use AT commands (e.g., AT+SSID?, AT+PAIR=1) to query or set parameters.

The EWD611 series (EWD611-868NW33(485) / EWD611-915NW33(485) / EWD611-900NW20(485)) is Ebyte's benchmark product in the "video + data integrated wireless transmission" domain. With "two-in-one design, high power long range, dual-interface transparent transmission, and flexible networking" as its core highlights, it precisely solves the critical pain point of "high-speed video + high-reliability data simultaneous transmission" in industrial video surveillance, remote inspection, and emergency field communication scenarios.