WiFi Node Module with DHT11 Sensor for Temperature and Humidity Monitoring

This WiFi node module provides a straightforward solution for integrating temperature and humidity sensing into smart home or IoT projects without complicated wiring. The included DHT11 sensor measures temperature from 0°C to 50°C and relative humidity from 20% to 90%RH, offering practical data for environmental control, greenhouse monitoring, or equipment oversight. Its compact dimensions of 25mm x 21mm and light weight of 3.8g allow placement in tight spaces, and the wide operating voltage range of DC 3.7V to 12V, including 3.7V lithium battery support, means you can power it via a standard supply or battery for portable use. This module is designed for users who need a simple, single-point sensor node that connects over WiFi to a central system.

Features and Construction

The module integrates essential sensing and connectivity components into a small footprint. Its construction focuses on practical sensor integration rather than complex peripherals.

Sensor and Accuracy

The DHT11 sensor provides digital readings of temperature and humidity with a measurement range of 0-50°C and 20-90%RH. This covers common indoor and mild outdoor conditions, making it suitable for home automation, storage area monitoring, and basic agricultural tasks.

Power and Compatibility

The module accepts DC power from 3.7V to 12V, which includes compatibility with standard 3.7V lithium batteries. This flexibility allows both stationary setups with a mains adapter and portable applications where battery operation is needed, such as in monitoring remote equipment or temporary installations.

Uses and Placement

This module is intended for use in wireless sensor networks where the host controller reads data over WiFi. Its small size simplifies integration into existing enclosures or surface-mount setups.

Smart Home Automation

In a home environment, this node can monitor room temperature and humidity, feeding data to a hub that controls heating, ventilation, or dehumidifiers. The compact size allows discreet placement on shelves, in plant rooms, or behind furniture.

Equipment and Environment Monitoring

For workshops, server rooms, or greenhouses, the module provides real-time environmental data. The wide voltage range lets you power it from existing 12V systems or battery backups, ensuring continuous monitoring during power fluctuations.

Benefits and Buying Value

This product offers a cost-effective entry point for adding environmental sensing to a WiFi-connected system. Its simplicity reduces setup time and maintenance overhead.

Ease of Integration

With standard WiFi connectivity and a common DHT11 sensor, this module works with many popular IoT platforms and microcontrollers. No soldering of complex sensor arrays is required, just a power connection and network pairing.

Compact and Lightweight Design

At 25mm x 21mm and only 3.8g, the module occupies minimal space and adds negligible weight to any fixture. This makes it ideal for retrofitting into existing systems or embedding in prototype projects where size constraints are a concern.