ECOWITT WS3900 User manual

Weather Station Receiver Manual
Model: WS3900/WS3910
https://s.ecowitt.com/E8FN9Q

Table of Contents
1. Introduction........................................................................................... 1
2. Installation............................................................................................. 2
2.1 Part List ............................................................................................ 2
2.2 Wi-Fi Configuration.........................................................................2
2.2.1 Power-up ................................................................................... 2
2.2.2 Download the Ecowitt App .......................................................3
2.2.3 Connect the Station to Wi-Fi via Ecowitt App ......................... 4
2.2.4 Connect the Station to Wi-Fi via Web Page 192.168.4.1 ......... 7
2.2.5 Device Location, Timezone, DST, and Data Public ...............12
2.2.6 Replacing Wi-Fi Router ..........................................................13
2.3 Adding Sensors.............................................................................. 14
2.4 Upload Data to Server ....................................................................15
3. Instructions for Use ..............................................................................16
3.1 Multiple Views and Size ................................................................16
3.2 Features .......................................................................................... 17
3.3 Icon Explanation ............................................................................ 19
3.3.1 Date & Time ........................................................................... 20
3.3.2 CO2/PM1.0/PM2.5/PM10/AQI.............................................. 21
3.3.3 Weather Forecast .................................................................... 22
3.3.4 Pressure Trend Function ......................................................... 23
3.3.5 Wi-Fi Icon ...............................................................................24
3.3.6 Indoor Temperature, Humidity, and Pressure .........................24
3.3.7 Outdoor Temperature and Humidity .......................................25
3.3.8 Wind........................................................................................25
3.3.9 Rainfall ....................................................................................25
3.3.10 UVI ....................................................................................... 26
3.3.11 Moon Phase...........................................................................26
3.3.12 Feels Like ..............................................................................27
3.3.13 LCD Display Brightness ....................................................... 28
3.3.13.1 When Battery Powered .................................................. 28
3.3.13.2 When DC Powered ........................................................ 28
3.3.14 DATE and CO2 Display Switching ............................... 28
3.3.15 Feel Like ............................................................................... 30
3.4 Buttons ........................................................................................... 30
3.5 Product Modes ............................................................................... 32
3.5.1 Normal Mode .......................................................................... 32
3.5.2 Setting Mode ...........................................................................34
3.5.3 Max/Min Value Mode .............................................................35

3.5.4 Alarm Setting Mode ................................................................35
3.5.4.1 Alarm Function................................................................ 35
3.5.4.2 Snooze Function ...............................................................36
3.5.5 MAC Address Display ............................................................37
3.5.6 Built-in CO2 Sensor Calibration .............................................37
3.6 Historical Data Export and Clear ...................................................39
3.6.1 Export History Data ................................................................ 39
3.6.2 Clear History Data .................................................................. 40
3.7 Firmware Upgrade ......................................................................... 41
4. Optional Sensors .................................................................................. 42
4.1 Sensors ........................................................................................... 42
4.1.1 Sensor Data Can be Displayed on the WS3900/WS3910 ...... 43
4.1.2 Sensor Data Can Only be Uploaded to the Cloud ...................44
4.2 IoT Device ..................................................................................... 45
4.3 Calibrate the WH46/WH45 Sensor................................................46
5. Others...................................................................................................47
5.1 Lightning Distance Unit .................................................................47
6. Specifications.......................................................................................49
7. Warranty and Statement .......................................................................51
7.1 Warranty........................................................................................ 51
8. Care and Maintenance ..........................................................................52
9. Contact Us ............................................................................................53
9.1 After-sales Service......................................................................... 53
9.2 Stay in Touch ................................................................................. 53

1
1. Introduction
Figure 1 Ecowitt Ecosystem
Thank you for your purchase of Ecowitt WS3900/WS3910 weather
station receiver.
Ecowitt WS3900/WS3910 is a brand new 7.5-inch Wi-Fi LCD large
screen weather station receiver. Supports monitoring indoor and outdoor
conditions, has built-in temperature, humidity, barometric pressure , and
CO2(only WS3910) sensors, and can connect almost all Ecowitt
transmitters with the same RF frequency to use together, to get accurate
weather data including wind speed, wind direction, rainfall, UV, solar
radiation, outdoor temperature, outdoor humidity, dew point, feels like,
CO2, PM1.0, PM2.5, PM10 and more.
Built-in sensors
WS3900
WS3910
CO2 sensor
×
√
Temperature-
Humidity sensor
√
√
Pressure sensors
√
√
Meanwhile, it supports connecting IoT devices, such as WFC01 and
AC1100, to achieve smart control through the Ecowitt App, which is a
powerful weather station receiver.

2
WS3900/WS3910 supports connecting to a 2.4 GHz Wi-Fi network for
viewing data from anywhere on your phone, tablet, and computer
browser, all for free.
Just so you know, the WS3900/WS3910 needs to be used with sensors to
obtain outdoor weather data and is not a standalone product.
The following user guide provides step by step instructions for
installation and operation. Use this manual to become familiar with your
professional weather station and save it for future reference.
2. Installation
2.1 Part List
1 x WS3900/WS3910 Weather Station Receiver
1 x User Manual
1 x 3.5mm DC to USB Cable
2.2 Wi-Fi Configuration
2.2.1 Power-up
Figure 2: Install the Batteries or Insert the Power Adapter
Insert the 5V 1A Power Adapter into an outlet, and then plug it into the
Power Jack, or install 3 unused AA alkaline or lithium batteries (not
included) into the Battery Compartment to power the station on.
Note: The console does not have a function to recharge the rechargeable
battery.

3
The direction of the batteries can not be reversed.
The software version number and frequency are displayed for 1 second,
then full-screen displayed for 3 seconds, and finally enter normal mode.
The console automatically opens the hotspot in 5 minutes to be paired by
the phone or the laptop, and contact with the wifi.
If the hotspot does not get any action, and will be automatically closed
after 5 minutes.
2.2.2 Download the Ecowitt App
Visit the App Store or Google Play Store or scan the QR code below to
download the free Ecowitt App onto your mobile device.
Open the Ecowitt App, follow the on-screen setup instructions to create
an account, add a new my device, and follow Section 2.2.3 or 2.2.4 below
to connect your station to your Wi-Fi network.
Figure 3: Download Ecowitt App
Note: For section 2.2.3 or 2.2.4 below, you’ll need your Wi-Fi network
name (SSID) and password. Make sure your mobile device is connected
to the same Wi-Fi network.

4
2.2.3 Connect the Station to Wi-Fi via Ecowitt App
(1) Open Ecowitt App, click "Add New Devices", click
WS3900/WS3910 icon, and choose WiFi Provisioning：
Figure 4

5
(2) Hold WS3900/WS3910’s button TEMP +-for more than 2s in
normal mode will trigger to turn on AP (WS3900/WS3910’s hotspot),
Wi-Fi icon will flash fast on the screen. Use your mobile phone to
connect to the hotspot "WS39xx-WIFIxxxx".
e.g.: WS3900x/WS3910x-WIFIxxxx, the first x represents the frequency,
A=868MHz, B=915MHz, C=433MHz, xxxx represents the last 4 digits of
the product MAC address.
Figure 5
(3) Fill in the Wi-Fi SSID and Password.

6
Figure 6
(4) After the gateway setup is successful. Switch to your usual Wi-Fi.
WS3900/WS3910 has been successfully added to the App, and you can
view the weather data on the App.

7
Figure 7
Note: If you are unable to connect the WS3900/WS3910 to Wi-Fi using
the Ecowitt App, we recommend using the setup via Embedded Web
Page 192.168.4.1.
2.2.4 Web Page 192.168.4.1
(1) Turn on WS3900/WS3910’s AP.
The WS39xx’s hotspot will be turned on automatically when the product
is powered on, if the product is not paired with a network, the AP will be
turned on all the time, and the Wi-Fi signal icon flashes fast to indicate.
(2) If WS39xx’s hotspot can not be searched, hold TEMP +-for more
than 2s in normal mode will trigger to turn on AP, Wi-Fi icon will
flash fast.
The above (1)(2)the WIFI hotspot should be in 5-minute pairing mode. If
the pairing action does not be taken, so the WIFI hotspot will be closed
automatically. If there is a phone or laptop to pair with the WIFI hotspot,
the pairing time will be automatically extended to ensure the operation is
successful.

8
Connecting this WS39xx’s hotspot on a mobile phone or PC.
e.g.: WS3900x/WS3910x-WIFIxxxx, the first x represents the frequency,
A=868MHz, B=915MHz, C=433MHz, xxxx represents the last 4 digits of
the product MAC address.
(3) Open the browser and visit 192.168.4.1.
Enter the login page, the default password is empty, click Login directly.
(4) Select Local Network.
(5) Select Scan Router, wait for the scanning to complete, and then select
the router.

9
Figure 8: Select the router
(6) After entering the Wi-Fi password, click Apply
Figure 9
(7) After connecting to the router, it prompts Connection successful.

10
Figure 10
(8) Wi-Fi configuration is complete. Copy the MAC Address for the
following steps.
Figure 11: Copy the MAC address

11
(9) Open Ecowitt App, click "Add New Devices", click
WS3900/WS3910 icon, and choose Manually Adding：
Figure 12
(10) Edit the Device Name and paste the MAC address copied in step (8)
into the box, and click "Save", then you can view the data on the App.
Figure 13

12
2.2.5 Device Location, Timezone, DST, and Data Public
After completing the Wi-Fi configuration, follow these steps for Device’s
precise location, Timezone, DST (Daylight Saving Time), and Data
public settings.
1. Click on 'My Devices'.
2. Click on the '...' icon in the upper right corner of the gateway module.
3. Set the Device's precise location and Timezone on this interface.
4. Tick 'Auto DST' and 'Is Public' when necessary.
5. Click 'Save', then reboot the WS3900/WS3910 device, the device will
automatically synchronize time and DST.

13
Figure 14: Related settings via Ecowitt App
Note: After completing the above Wi-Fi configuration and related
settings, the WS3900/WS3910 screen will display a stable Wi-Fi signal
tower, auto time zone, and DST (when necessary).
Figure 15: WS3900/WS3910 sync App related settings
2.2.6 Replacing Wi-Fi Router
If you want to change your router, follow these steps again after restoring
the gateway to its factory settings (Hold SET +LIGHT for a factory reset).

14
2.3 Adding Sensors
To pair the optional sensors (refer to Section 4 for more optional sensors)
with the WS3900/WS3910 display console, please do as follows:
1. Place the optional sensor next to the console.
2. Install batteries on the sensor and wait for 1-2 minutes.
3. Check whether the console will pick up the sensor data automatically
and display it on the screen or App.
4. If data is not received from a registered sensor, the RF icon will
decrease the signal by one frame; if data is received, the RF icon will
increase the signal by one frame.
5. If data is not received, try the following: after making sure the phone
and WS3900/WS3910 are connected to the same Wi-Fi network, open
the Ecowitt App, find Sensors ID, and enter the Edit Gateway page.
6. In the Edit Gateway page, find the sensor you want to pair - select the
ID number box and register it.
7. Once successful, you may return to the main interface to check the data.
8. If you know exactly the sensor ID, and want the console to pair that
sensor only, you may enter the sensor ID, and save the change to make
it effective.
Figure 16: Sensor ID page

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2.4 Upload Data to Server
After the Wi-Fi configuration is successful, data can be uploaded to the
following weather station servers:
A. ecowitt.net (Default upload to this server)
B. wunderground.com
C. weathercloud.net
D. wow.metoffice.gov.uk
E. Customized servers
Upload servers management:
(1) Ensure that the mobile phone and WS3900/WS3910 receiver are
using the same Wi-Fi.
(2) Ecowitt App - "..." at the top right corner - "Others" - "DIY
Upload Servers"
Figure 17: Upload data to server

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3. Instructions for Use
3.1 Multiple Views and Size
Figure 18: Main view
Figure 19: Right view

17
Figure 20: Top view
Figure 21: Rear view (Refer to 3.4 for Button functions)
3.2 Features
7.5" LCD color display
8 physical buttons
Support DC powered and 3 x AA battery powered (Battery not
included. Tested to run for about 24 hours on battery power alone.
Battery only used as a short-term backup power)
Calendar, date, time, moon phase, sunrise, and sunset
Built-in temperature humidity sensor, and barometric pressure,
CO2(only WS3910) sensors
Support displaying indoor temperature, humidity, pressure, and
changing trend