Ecowitt WS3901 Wifi Weather Station User Manual
Model: WS3901
1. Introduction
The Ecowitt WS3901 Wifi Weather Station is an advanced smart device designed to provide comprehensive environmental data. It measures various parameters including temperature, humidity, wind speed, wind direction, precipitation, UV light, and supports Internet of Things (IoT) integration. This manual provides detailed instructions for setting up, operating, and maintaining your weather station.
Figure 1: Ecowitt WS3901 Wifi Weather Station Console and WS90 Outdoor Sensor
2. Package Contents
Please check the package contents carefully. If any items are missing or damaged, contact customer support.
- 1 x WS3901 Display Console
- 1 x WS90 Solar Outdoor Sensor
- 1 x User Manual
- 1 x Mounting Hardware Pack
- 1 x DC 5V 1A USB Cable
3. Features
3.1. WS3901 Display Console
- 7.5-inch LCD display for clear data visualization.
- 8 physical buttons for easy navigation and settings adjustment.
- Power options: DC adapter or 3 x AA alkaline/lithium batteries (batteries are for short-term backup, not included).
- Built-in temperature, humidity, and barometric pressure sensors.
- Displays calendar, date, time, moon phase, sunrise, sunset, with alarm and snooze functions.
- Weather forecast icons: Sunny, Partly Cloudy, Cloudy, Rainy, Stormy, Snowy, and Storm Snowy.
- Records Max & Min values with RST function to clear daily records.
- Supports unit setting and Daylight Saving Time (DST).
- Versatile placement: Wall-hanging or free-standing.
- Adjustable backlight when powered by DC.
- Supports optional sensors and IoT devices for expanded monitoring.
- Receives and displays multi-channel data: temperature, humidity, wind speed, wind direction, rainfall, UV, solar radiation, feels like temperature, dew point, CO2, PM1.0, PM2.5, PM10, and AQI.
- Data storage and access on Ecowitt server: https://ecowitt.net.
- Supports uploading data to third-party weather platforms.
3.2. WS90 Outdoor Sensor
- Measures outdoor temperature and humidity.
- Ultrasonic Anemometry for accurate wind speed and direction.
- Piezoelectric rainfall sensor for precise precipitation measurement.
- Monitors UV and solar radiation levels.
4. Setup
4.1. WS3901 Display Console Setup
- Power Supply: Connect the DC 5V 1A USB cable to the console and a power source. For short-term backup, insert 3 x AA batteries (not included). Note that batteries alone will only power the console for 15-25 days.
- Initial Boot: The console will power on and begin searching for the outdoor sensor.
- Placement: Choose a suitable location for the console, either wall-mounted or free-standing, ensuring good visibility and proximity to your Wi-Fi router for optimal connectivity.
Figure 2: WS3901 Console Display and Button Layout
Figure 3: WS3901 Console Display Dimensions (7.5-inch LCD, 6.6 x 3.7 inch screen)
4.2. WS90 Outdoor Sensor Setup
- Power Supply: The WS90 sensor is primarily solar-powered with a built-in solar panel. For backup, insert 2 x AA batteries (not included) into the AA LR6 Battery Compartment.
- Mounting: Mount the WS90 sensor on a pole with a 1-inch diameter using the provided Fixed Bolt and Mounting Hardware Pack. Ensure it is in an open area, away from obstructions that could affect wind, rain, or solar readings.
- Alignment: Use the NORTH Alignment Indicator to orient the sensor correctly. This is crucial for accurate wind direction readings.
- Connectivity: The WS90 communicates wirelessly with the WS3901 console via RF communication, with a range of over 100 meters (in open areas).
Figure 4: WS90 Outdoor Sensor Component Diagram
Figure 5: WS90 Dual Power Supply and Auto-Heater Function Details
4.3. Network Connectivity and Data Upload
- The WS3901 console connects to your local Wi-Fi network (802.11 b/g/n 2.4 GHz).
- Once connected, the console can upload data to the Ecowitt server (https://ecowitt.net) and other third-party platforms like Weather Underground, Met Office, and Weathercloud.
- The Ecowitt app can be used to view data and manage settings.
Figure 6: WS3901 Connectivity Diagram (WS90 to WS3901, then to app/cloud services)
5. Operation
5.1. Displaying Data
The 7.5-inch LCD display provides a comprehensive overview of current and historical weather data. The display includes:
- Outdoor Data: Temperature, Humidity, Wind Speed, Wind Direction, Rain Rate (Daily/Weekly/Monthly/Yearly/Total), UV Index, Solar Radiation.
- Indoor Data: Temperature, Humidity, Barometric Pressure (Absolute/Relative).
- Time & Date: Current time, date, moon phase, sunrise, sunset, and Daylight Saving Time (DST) indicator.
- Forecast: Graphical weather forecast icons.
- Additional Data: CO2, PM1.0, PM2.5, PM10, and AQI data if optional sensors are connected.
Figure 7: Weather Forecast Icons on WS3901 Console
5.2. Console Buttons
The console features 8 physical buttons for various functions:
- SET: Enter setup mode or confirm settings.
- TEMP: Cycle through temperature displays or settings.
- RAIN 1 / RAIN 2: View different rainfall data or settings.
- WIND: Cycle through wind data displays.
- + / -: Adjust values or navigate menus.
- LIGHT: Adjust backlight brightness.
5.3. Data Recording and Reset
The console automatically records maximum and minimum values for various parameters. Use the RST function to clear daily max/min values. Refer to the detailed manual for specific button sequences for these operations.
6. Maintenance
6.1. WS90 Outdoor Sensor
- Haptic Rainfall Sensor: The WS90 features a haptic rainfall sensor with no moving parts, significantly reducing maintenance compared to conventional rain gauges. This design is anti-vibration and designed for near-zero maintenance.
- Replaceable Sensor Kit: The temperature and humidity sensor inside the WS90 is part of a replaceable kit, meeting IPX5 waterproof standards. This allows for easy replacement if needed.
Figure 8: Haptic Rainfall Sensor Technology
Figure 9: WS90 Replaceable Temperature and Humidity Sensor Kit
6.2. Auto-Heater Function
The WS90 sensor includes an auto-heater function to prevent freezing in cold conditions. The heating plate automatically turns on when the temperature drops below 5°C (41°F) and turns off when it rises above 10°C (50°F). Please note that the DC 12V adapter and heating power cord are sold separately and are required for this function.
6.3. Battery Replacement
- Console: If using AA batteries for backup, replace them when the low battery indicator appears on the display.
- WS90 Sensor: While primarily solar-powered, the backup AA batteries should be checked periodically and replaced if necessary, especially in prolonged periods of low sunlight.
7. Troubleshooting
- No Display on Console: Ensure the DC power adapter is securely connected or that fresh AA batteries are installed.
- No Outdoor Sensor Data: Check the WS90 sensor's battery compartment for proper battery installation (if using backup batteries) and ensure it's receiving adequate sunlight. Verify the console and sensor are within the 100m RF communication range and free from major obstructions.
- Inaccurate Readings: Ensure the WS90 sensor is mounted correctly, especially the NORTH alignment for wind direction. Clear any debris from the rainfall sensor. For temperature/humidity, ensure the sensor is not exposed to direct sunlight or heat sources.
- Wi-Fi Connectivity Issues: Ensure your Wi-Fi network is 2.4 GHz. Check your router's signal strength near the console. Re-enter Wi-Fi credentials if necessary via the console's setup menu.
- Data Not Uploading to Ecowitt.net: Verify the console has a stable internet connection. Check your Ecowitt.net account settings and ensure the device is registered and online.
8. Specifications
| Attribute | Value |
|---|---|
| Brand Name | ECOWITT |
| Model Number | WS3901 Weather Station |
| Display Type | DIGITAL |
| Power Type | Solar Powered |
| Certification | CE, FCC |
| Is Smart Device | Yes |
| Use | Outdoor |
| Display Size | 7 Inches & Above |
| Display Dimensions | 8.2 x 5.6 x 1.1 inch |
| Screen Size | 6.6 x 3.7 inch |
| Display 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) |
| Outdoor Temperature Metering Range | -40°C to 60°C |
| Outdoor Temperature Metering Accuracy | ±0.3°C(±0.6°F) |
| Outdoor Temperature Metering Resolution | 0.1°C(±0.2°F) |
| Outdoor Humidity Metering Range | 1 to 99% |
| Outdoor Humidity Metering Accuracy | ±3.5% |
| Outdoor Humidity Metering Resolution | 1% |
| Wind Speed Metering Range | 0m/s to 40m/s |
| Wind Speed Metering Accuracy | <10m/s, ±0.5m/s; ≥10m/s, ±5° |
| Wind Speed Metering Resolution | 0.1m/s |
| Wind Direction Metering Range | 0° to 359° |
| Wind Direction Metering Accuracy | <2m/s, ±10°; ≥2m/s, ±7° |
| Wind Direction Metering Resolution | 1° |
| Rain Metering Range | 0 to 9999 |
| Rain Metering Accuracy | TBA |
| Rain Metering Resolution | 0.1mm |
| UVI Metering Range | 1 to 15 |
| UVI Metering Accuracy | ±2 |
| UVI Metering Resolution | 1 |
| Light Metering Range | 0 to 200Klux |
| Light Metering Accuracy | ±15% |
| Light Metering Resolution | 0.1Klux |
| 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℉) |
| Console Power Supply | 3.5mm 5V DC to USB or 2 AA Battery (not included) |
| Console Battery Life | 15-25 days (with AA batteries) |
| WS90 Power Supply | Solar panel (built-in)/2*AA batteries (not included) |
9. User Tips
No specific user tips were provided in the available data. For best performance, ensure your outdoor sensor is mounted in an unobstructed location and regularly check battery levels for both the console (if using backup) and the outdoor sensor.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact Ecowitt Official Store customer service or visit the official Ecowitt website. Keep your purchase receipt as proof of purchase.
