WiFi Node Module with DHT11 Sensor for Remote Temperature and Humidity Monitoring

This compact WiFi node module is engineered for straightforward environmental sensing, providing a dedicated solution for tracking temperature and humidity levels remotely. At its core is the DHT11 sensor, a reliable component capable of measuring temperatures from 0 to 50 degrees Celsius and relative humidity from 20 to 90 percent. The module’s defining feature is its flexible power design, accepting a DC input from 3.7V up to 12V. This specifically includes compatibility with a 3.7V lithium battery, making it suitable for applications away from constant mains power, such as in sheds, greenhouses, or during transport. Weighing a mere 3.8 grams and measuring just 25mm by 21mm, its small footprint allows for discreet installation in a variety of spaces.

Features and Construction

This module is built around a clear set of measurable specifications, prioritising core functionality for network-connected sensing. Its construction is centred on integrating the sensor with the necessary electronics for WiFi connectivity and power management within a minimal space.

Material and Build

The source information confirms the use of a DHT11 temperature and humidity sensor as the primary sensing element. Details regarding the printed circuit board (PCB) substrate, component quality, or external housing material are not specified. The build focuses on delivering the stated measurement capabilities and power flexibility within the given compact dimensions, without extraneous claims about premium materials or extended durability.

Size and Practical Fit

The module's practicality is significantly enhanced by its minimal size of 25mm by 21mm and light 3.8-gram weight. These dimensions mean it can be fitted into tight spaces, attached to surfaces with minimal adhesive, or integrated into other projects without adding bulk. The small form factor directly supports its use in discrete monitoring scenarios where a larger device would be obtrusive or impractical.

Uses and Placement

The combination of WiFi connectivity, specific sensor range, and battery support defines several logical use cases. Its application is guided by the concrete data provided: the 0-50°C temperature range and 20-90% RH humidity range.

Event or Professional Use

For professional or event-based monitoring, this module can serve as a node in a simple network to track conditions in storage units, server rooms, or exhibition spaces where temperature and humidity control is important but not extreme. The ability to run on a lithium battery allows for temporary deployments during events, in transit for logistics monitoring, or in areas without readily available power sockets, providing data remotely without manual checks.

Everyday Home Use

In a domestic setting, it is well-suited for monitoring rooms like the garage, loft, wine cellar, or a terrarium, where the environmental conditions fall within its measurement spectrum. Homeowners can use it to receive alerts if a room becomes too cold for pipes or too humid for stored goods. Its compact size makes it easy to place on a shelf, wall, or among stored items without being noticeable.

Benefits and Buying Value

The value of this module lies in its focused functionality, defined by its specifications rather than invented claims. It provides a specific tool for a specific monitoring need, with clear parameters for its operation.

Reuse and Low Maintenance

The module is designed for continuous operation as a sensing node. Its low power draw, enabled by the support for a 3.7V lithium battery, suggests potential for extended use between charges or battery changes depending on the chosen power solution and transmission interval. Maintenance would primarily involve ensuring a stable WiFi connection and managing the power source, be it battery replacement or checking a DC power adapter.

Why Choose This Product

This module is a practical choice for users who require a basic, network-connected temperature and humidity sensor with verified ranges and notable power supply flexibility. Its key differentiators are the concrete DHT11 sensor specification, the wide 3.7V-12V DC operating range that includes battery support, and its exceptionally compact size. It is a solution for integrating environmental data into a smart home system or for a standalone monitoring project where these specific, source-supported features match the requirement.