1. Introduction
The Ecowitt WS3900 is a Wi-Fi enabled weather station receiver featuring a 7.5-inch LCD color display. It is designed to receive and display data from various Ecowitt outdoor sensors and supports integration with IoT devices like WFC01 and AC1100. This manual provides detailed instructions for setting up, operating, and maintaining your WS3900 console.
2. Features
- Wi-Fi enabled with a 7.5-inch LCD display.
- Equipped with 8 physical buttons for easy navigation.
- Supports DC power and 3 x AA Alkaline/Lithium batteries (not included) for backup.
- Displays calendar, date, time, moon phase, sunrise, sunset, alarm & snooze, and DST (Daylight Saving Time).
- Features 5 levels of adjustable backlight.
- Allows unit setting and records maximum & minimum values with an RST function to clear daily max/min.
- Offers standing and wall-hanging options for flexible placement.
- Includes built-in temperature, humidity, and barometric pressure sensors.
- Capable of receiving and displaying data from 8 channels for temperature and humidity, wind speed, wind direction, rainfall, UV, solar radiation, feels like temperature, dew point, CO2, PM1.0, PM2.5, PM10, and AQI.
- Provides weather forecasts: Sunny, Partly Cloudy, Cloudy, Rainy, Stormy, Snowy, and Storm Snowy.
- Supports Wi-Fi configuration via the Ecowitt App and a web interface (192.168.4.1).
- Uploads data to various weather station servers including ecowitt.net (default), wunderground.com, weathercloud.net, wow.metoffice.gov.uk, and customized servers.
- Data storage and download available on ecowitt.net.
- Supports optional sensors (refer to compatibility tables).
3. Package Contents
- 1 x WS3900 Weather Station Receiver
- 1 x DC to USB Cable (power adapter not included)
- 1 x User Manual
4. Setup
4.1 Powering the Console
- Connect the provided DC to USB cable to the console and a suitable USB power adapter (not included).
- For backup power, insert 3 x AA Alkaline or Lithium batteries into the battery compartment on the back of the console. Ensure correct polarity.
4.2 Wi-Fi Configuration
To enable data upload and remote access, configure the Wi-Fi connection:
- Download the Ecowitt App on your smartphone or tablet.
- Follow the in-app instructions for Wi-Fi setup.
- Alternatively, you can configure Wi-Fi via a web page by connecting to the console's temporary Wi-Fi network and navigating to
192.168.4.1in your browser. Refer to the detailed instructions in the included manual for this method.
4.3 Sensor Pairing
The WS3900 automatically attempts to connect to compatible Ecowitt sensors within range. Ensure your sensors are powered on and functioning correctly. The console supports various sensors for outdoor temperature/humidity, wind, rain, UV, solar radiation, and more. Refer to the compatibility tables in Section 7 for supported sensor models.
Figure 1: Rear view of the WS3900 console with battery compartment and model details.
5. Operating Instructions
5.1 Display Overview
The 7.5-inch LCD color display provides a comprehensive overview of current weather conditions. It shows outdoor and indoor temperature and humidity, wind speed and direction, rainfall data (rate/daily/weekly/monthly/yearly/total), barometric pressure, weather forecast, UV index, and solar radiation. The display also includes date, time, moon phase, and DST indicators.
Figure 2: Front view of the WS3900 console display.
Figure 3: Detailed display layout and button functions.
5.2 Button Functions
The console features 8 physical buttons located on the top for various operations:
- SET (1): Press to adjust backlight when powered by DC. Hold to enter setting mode.
- TEMP (2): Press to switch display information. Hold to activate Wi-Fi hotspot configuration.
- RAIN 1 (3): Press to switch rain rate/event. Hold to register weather data.
- RAIN 2 (4): Press to switch rain daily/weekly/monthly/yearly/total. Hold to enter setting mode.
- WIND (5): Press to switch wind direction/10min avg/gust. Hold to enter alarm setting mode.
- + (6): Press to increase value or navigate forward in setting mode.
- - (7): Press to decrease value or navigate backward in setting mode.
- LIGHT (8): Press to adjust backlight. Hold to enter setting mode.
5.3 Weather Forecast
The console provides a weather forecast based on barometric pressure changes. The forecast icons include:
- Sunny
- Partly Cloudy
- Cloudy
- Rainy
- Stormy
- Snowy
- Storm Snowy
Figure 4: Weather forecast icons displayed on the console.
5.4 Data Upload
Once Wi-Fi is configured, the WS3900 can upload data to various online weather platforms:
- ecowitt.net (Default server)
- wunderground.com
- weathercloud.net
- wow.metoffice.gov.uk
- Customized servers
You can access and download your historical data from ecowitt.net.
6. Maintenance
- Cleaning: Wipe the console with a soft, damp cloth. Avoid abrasive cleaners or solvents.
- Battery Replacement: If using batteries for backup, replace them when the low battery indicator appears on the display. Ensure to use 3 x AA Alkaline or Lithium batteries.
- Factory Reset: To perform a factory reset, hold down the 'SET' and 'LIGHT' buttons simultaneously. This will clear all settings and data.
7. Troubleshooting
- No Display/Power: Ensure the DC power cable is securely connected or that fresh AA batteries are installed with correct polarity.
- No Sensor Data: Check if outdoor sensors are powered on and within the RF wireless range (over 100 meters in open areas). Ensure the console's RF frequency matches your region (915/868/433MHz).
- Wi-Fi Connection Issues: Verify your Wi-Fi network is 2.4 GHz (802.11 b/g/n). Re-attempt Wi-Fi configuration via the Ecowitt App or web interface (192.168.4.1). Ensure the console is within WLAN range (over 30 meters in open areas).
- Compatibility with other sensors (e.g., Ecowitt WH2650a, Gevanti FT0350): The WS3900 is designed to work with specific Ecowitt sensors and IoT devices. Please refer to the compatibility tables below to confirm if your sensor model is supported. If your sensor is not listed, it may not be compatible.
Sensor Compatibility Tables
Figure 5: Sensor data display compatibility with WS3800 (similar to WS3900).
Figure 6: Ecowitt Console and Sensor Compatibility Matrix.
8. Specifications
| Attribute | Value |
|---|---|
| Brand Name | ECOWITT |
| Model Number | WS3900 |
| Display Type | DIGITAL |
| Power Type | Charger |
| Certification | CE, FCC, RoHS, WEEE |
| Origin | Mainland China |
| Style | Standing and Wall Hanging |
| Is Smart Device | Yes |
| Use | Indoor |
| Display Size | 7 Inches & Above |
| Name | Weather Station (receiver) |
| Dimensions | 8.2 x 5.6 x 1.1 inch |
| Screen Size | 6.6 x 3.7 inch |
| Weight | 368.9(g) |
| Material | ABS + HTN-LCD |
| Indoor Temperature Metering Range | -9.9°C to 60°C (14°F to 140°F) |
| Indoor Temperature Metering Accuracy | ±0.2°C (±0.4℉) |
| Indoor Temperature Metering Resolution | 0.1°C (0.2℉) |
| Indoor Humidity Metering Range | 1% to 99% |
| Indoor Humidity Metering Accuracy | ±2% |
| Indoor Humidity Metering Resolution | 1% |
| Barometric Pressure Metering Range | 300 to 1100 hPa (8.85 to 32.5 inHg) |
| Barometric Pressure Metering Accuracy | ±1.5hpa (absolute pressure); ±2hpa (relative pressure) |
| Barometric Pressure Metering Resolution | 0.1 hPa (0.01 inHg) |
| Reading Update Interval | About 1 minute |
| RF Connection Frequency | 915/868/433MHz (depending on local regulations) |
| RF Wireless Range | Over 100 meters (in open areas) |
| WLAN | 802.11 b/g/n 2.4 GHz (802.11n, Max 150 Mbps) |
| WLAN Range | Over 30 meters (in open areas) |
| Console Operating Temperature | -10°C to 50°C (14℉ to 122℉) |
| Power Supply | DC 5V 1A or 3 AA Alkaline Batteries (not included) |
| Battery Life (Back-up only) | 15-25 days |
9. User Tips
- Regional Frequency: Ensure you select the correct RF Connection Frequency (915/868/433MHz) during setup, as this depends on your local regulations and affects sensor communication.
- Battery Quality: For reliable backup power, use high-quality Alkaline or Lithium AA batteries.
- Sensor Compatibility: Always refer to the provided compatibility tables (Figures 5 and 6) before purchasing or attempting to connect additional sensors or IoT devices to ensure they are supported by the WS3900 console.
- Wi-Fi Range: While the console has a good Wi-Fi range, placing it closer to your router during initial setup can help ensure a stable connection.
10. Warranty and Support
The Ecowitt WS3900 Wi-Fi Weather Station Receiver comes with a manufacturer's warranty. For specific warranty terms, technical support, or service inquiries, please refer to the official Ecowitt website or contact their customer service directly. Keep your purchase receipt as proof of purchase.
