Matter Wi-Fi Temperature and Humidity Sensor with Tasmota, ESP32-C3 and SHT40
Smart Indoor Climate Monitoring
Monitor indoor temperature and relative humidity in real time with this compact Wi-Fi sensor. It combines a high-accuracy Sensirion SHT40 sensor, an ESP32-C3 Wi-Fi chip and Tasmota firmware with Matter support.
Simply plug it into a USB power adapter, connect it to your 2.4 GHz Wi-Fi network and integrate it with your preferred smart home system.
Key Features
Built-in Sensirion SHT40 temperature and humidity sensor
High-accuracy digital environmental measurement
Real-time temperature and relative humidity readings
Built-in ESP32-C3 Wi-Fi microcontroller
Matter over Wi-Fi support
Compatible with MQTT and Home Assistant
Local Tasmota web interface
Direct firmware flashing through USB
OTA firmware update support
Compact USB-powered design
No mandatory proprietary cloud service
Suitable for monitoring and smart home automation
Matter Smart Home Integration
The sensor uses Matter over Wi-Fi and does not require a Thread Border Router. A compatible Matter controller or smart home hub may be required by your selected platform.
Displayed sensor values and available automation functions may vary according to the Matter platform, controller and firmware version.
Monitor Your Indoor Environment
Temperature and humidity have an important effect on indoor comfort, storage conditions and the risk of excessive dryness or condensation.
This sensor is suitable for monitoring areas such as:
Bedrooms
Living rooms
Home offices
Baby rooms
Greenhouses
Storage rooms
Server cabinets
Workshops
Smart ventilation systems
Heating and cooling systems
The measured values can also be used in home automation rules to control humidifiers, dehumidifiers, fans, heaters, air conditioners or other compatible devices.
Powered by Tasmota
Tasmota provides flexible local configuration and smart home integration without requiring a mandatory proprietary cloud account.
Supported functions may include:
Matter over Wi-Fi
MQTT communication
Home Assistant discovery
Real-time temperature and humidity readings
Local web configuration
Configurable telemetry intervals
Automation rules
OTA firmware updates
Direct USB firmware flashing
Available functions depend on the installed Tasmota firmware build and device configuration.
Plug In and Power On
The sensor is powered by a standard 5 V USB connection.
It can be connected to:
A USB wall power adapter
A computer USB port
A powered USB hub
A compatible USB extension cable
Its compact plug-in design reduces cable clutter and makes it suitable for continuous indoor monitoring.
Direct USB Firmware Flashing
The ESP32-C3 supports firmware flashing through the USB connection. You can install, update or recover compatible firmware without using a separate USB-to-serial adapter.
This feature is useful for Tasmota users, developers and DIY smart home projects.
Technical Specifications
| Specification | Details |
|---|---|
| Product Type | Wi-Fi temperature and humidity sensor |
| Main Controller | ESP32-C3 |
| Sensor Chip | Sensirion SHT40 |
| Sensor Type | Digital temperature and humidity sensor |
| Temperature Measurement Range | -40°C to +125°C |
| Typical Temperature Accuracy | ±0.2°C |
| Humidity Measurement Range | 0–100% RH |
| Typical Humidity Accuracy | ±1.8% RH |
| Measured Values | Temperature and relative humidity |
| Wi-Fi Standard | IEEE 802.11 b/g/n |
| Wi-Fi Frequency | 2.4 GHz |
| Matter Protocol | Matter over Wi-Fi |
| Thread Support | No |
| Other Integration | MQTT and Home Assistant |
| Power Input | 5V USB |
| Firmware Flashing | Directly through USB |
| OTA Update | Supported by compatible firmware |
| Cloud Requirement | No mandatory proprietary cloud |
| Recommended Environment | Indoor use |
Accuracy values are based on the SHT40 sensor specifications under the manufacturer’s specified operating conditions. The supported operating range of the complete product may be narrower than the sensor chip’s measurement range.
Typical Automation Examples
Turn on a humidifier when the air becomes too dry
Start a dehumidifier when humidity becomes too high
Control a ventilation fan automatically
Monitor room temperature in Home Assistant
Record environmental data through MQTT
Send temperature or humidity alerts
Create different climate rules for day and night
Monitor storage rooms, greenhouses or equipment cabinets
Automation functions require compatible controllers, platforms or additional devices.
Package Contents
1 × ESP32-C3 Tasmota Matter Wi-Fi Temperature and Humidity Sensor
USB power adapter and other accessories are not included unless specified in the selected product option.
Important Information
The sensor supports 2.4 GHz Wi-Fi only. It cannot connect directly to a 5 GHz-only network.
Matter functions require compatible Matter-enabled Tasmota firmware.
A Matter controller or compatible hub may be required for pairing.
Matter features and displayed measurements may vary between smart home platforms.
This is a Matter-over-Wi-Fi product. It does not use Thread.
Install the sensor in a position with natural air circulation.
Keep the sensor opening unobstructed.
Avoid placing it directly beside heaters, air conditioners, humidifiers, open windows or other strong heat and moisture sources.
Heat generated by the ESP32-C3, USB power adapter or nearby equipment may influence temperature readings.
For more accurate room measurements, use a USB extension cable to keep the sensor away from heat-producing power adapters or computers.
Allow the sensor time to stabilize after it is powered on or moved to a different environment.
This product is intended for general indoor environmental monitoring.
