ECOWITT WS3901 Wi-Fi Weather Station Kit - IoT Console and 7-in-1

In this review the ECOWITT WS3901 Wi-Fi Weather Station Kit is evaluated for backyard weather monitoring and smart-garden integration. The bottom line: it is a solid choice for hobby meteorologists and smart-home tinkerers who want a robust outdoor sensor array and a large IoT-capable indoor console with cloud and local upload options. The single biggest reason to buy is the combination of the WS90 7-in-1 outdoor sensor and the WS3900 7.5' LCD console that together deliver continuous temperature, humidity, wind, rain, light and UV data with Wi-Fi accessibility.

Key Features

• 7-in-1 outdoor sensing: The WS90 collects temperature, humidity, wind direction and speed, light and UV levels, and rainfall so a single mount covers the key weather metrics for a yard or garden.
• 7.5' IoT LCD console: The WS3900 display has a built-in indoor temperature and humidity sensor plus barometric pressure to provide immediate local readings and history on a clear color screen.
• Wi-Fi and app access: The console supports 2.4 GHz Wi-Fi and uploads data to Ecowitt services or custom servers so readings are accessible from phone, tablet, or browser.
• IoT device pairing: The WS3900 can act as an IoT gateway for up to 16 devices, enabling integration with watering timers and smart outlets for automated garden tasks.
• Extensive sensor compatibility: Besides the WS90, the console can pair with a wide range of additional sensors for air quality, soil moisture, rain gauge and more to extend monitoring capability.

Who It's For

This kit suits homeowners and hobbyist weather watchers who want more than basic temperature and humidity: its multi-parameter WS90 sensor and the large WS3900 console appeal to people who want wind, rain, light and UV data visible at home and remotely via Wi-Fi. It is also a good fit for smart-garden users who plan to add IoT devices like watering timers or smart plugs and want a single gateway to manage those devices.

It is less ideal for casual buyers who only need a simple thermometer because the kit is more feature-rich and assumes some comfort with Wi-Fi setup and optional server configuration. Professional meteorological installations that require certified instruments or radio bands other than 915 MHz should look at specialized equipment.

Pros & Cons

Pros

• Comprehensive sensing in one outdoor package reduces installation clutter and gives reliable multi-metric data.
• Large color console with built-in sensors and Wi-Fi makes local and remote monitoring straightforward.
• IoT gateway functionality and broad sensor compatibility allow future expansion for automation and monitoring.

Cons

• Rain measurement and a few accuracy aspects receive mixed feedback, so users who need laboratory-grade precision may be disappointed.

Specifications

Product	WS3901 Wi-Fi Weather Station Kit
Outdoor sensor	WS90 7-in-1 sensor array
Indoor console	WS3900 7.5' colored LCD with indoor temp/humidity and barometer
Connectivity	2.4 GHz Wi-Fi upload to cloud or custom servers
IoT support	Pairs with up to 16 IoT devices and many Ecowitt sensors
RF Frequency	915 MHz

Our Verdict

The ECOWITT WS3901 kit is a strong value for backyard weather monitoring and smart-garden projects because it combines a durable multi-sensor outdoor unit with a large Wi-Fi capable console and IoT gateway. Buyers who want expandable sensing and remote access will find it flexible and cost-effective, while those seeking laboratory accuracy for rainfall or specialized research may want higher-tier instruments.

Frequently Asked Questions

Can the console upload data to online services?
The WS3900 supports uploads to Ecowitt servers, Weather Underground, WeatherCloud, Met Office and custom servers after Wi-Fi setup.

How many additional sensors can be added?
The WS3900 can pair with a variety of sensors and up to 16 IoT devices, plus multiple specific sensor types as listed in the user manual.

What frequency does the outdoor sensor use?
The kit operates on the 915 MHz RF frequency for sensor communication.