ECOWITT WS3901 Wi‑Fi Weather Station Kit — 7.5″ Color LCD Console & WS90 7‑in‑1 Outdoor Sensor (2.4 GHz, 915 MHz)

The ECOWITT WS3901 is a complete Wi‑Fi weather station kit that pairs a color 7.5" indoor display (WS3900) with a rugged WS90 7‑in‑1 outdoor sensor array to deliver live local weather data to the console, mobile app, and web.

Designed for hobby meteorologists, gardeners, and smart‑home fans, this kit combines a high‑resolution indoor console with a multi‑parameter outdoor sensor. The WS90 captures temperature, humidity, wind speed and direction, rainfall, light, and UV; the WS3900 receives that data over RF, connects to a 2.4 GHz Wi‑Fi network, and optionally acts as an IoT gateway for compatible devices. Data can be viewed locally on the screen or remotely through Ecowitt services and third‑party weather servers.

How does the WS90 outdoor sensor measure multiple weather elements?

The WS90 integrates several sensors into one compact array, giving you concurrent readings for temperature, humidity, wind, rainfall, light and UV. Its construction is built for outdoor exposure and transmits readings via a 915 MHz radio link to the indoor console.

• 7‑in‑1 sensing: temp, RH, wind speed, wind direction, rain, light, UV
• Single mounting point simplifies installation and orientation
• Durable housing for continuous outdoor use
• 915 MHz RF ensures long‑range communication to the console

What can the WS3900 console show and do on my network?

The WS3900 is a color 7.5" LCD console with built‑in indoor temp/humidity and barometric pressure sensors. It connects to a 2.4 GHz Wi‑Fi network to upload data, display station readings, and act as an IoT gateway for additional Ecowitt accessories.

• Live local display plus remote viewing via Ecowitt app and web
• Uploads to ecowitt.net and popular third‑party weather platforms
• Pairs with up to 16 IoT devices and many sensor types (sold separately)
• User setup via Ecowitt app or local web page (192.168.4.1)

How easy is setup and which systems does it support?

Setting up the WS3900 and WS90 is designed to be approachable: pair the sensors, configure Wi‑Fi either through the Ecowitt mobile app or the console’s web setup page, and choose whether to upload to public or custom servers. No subscription is required to use basic features.

• Two configuration methods: mobile app or local web interface
• Compatible with 2.4 GHz Wi‑Fi networks only
• Supports uploads to multiple weather services and custom endpoints
• Console serves as RF receiver and IoT hub for other Ecowitt devices

Which extra sensors and smart devices can I add later?

The WS3900 console supports pairing a wide range of Ecowitt sensors and IoT modules to expand monitoring and automation. Many additional sensors for soil moisture, air quality, lightning detection, rain gauges, and smart outlets can be integrated to build a custom weather and smart‑garden system.

• Supports multiple sensor types such as soil moisture, PM2.5, water leak and lightning
• Up to 16 IoT devices like watering timers and smart plugs
• Mix and match sensors to cover specific monitoring needs (sold separately)
• Console aggregates data and forwards to cloud or local servers

Who is this for: The ECOWITT WS3901 kit suits backyard weather enthusiasts, gardeners who need precise microclimate data, and smart‑home users who want an expandable IoT hub for environmental monitoring. If you want a single, weather‑proof outdoor sensor array plus a Wi‑Fi enabled indoor console that uploads readings to apps and weather networks, this kit provides a flexible foundation to build a larger monitoring network over time.