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DS18B20 Temperature Sensor Module 1-Wire Digital Thermometer Switch Compatible with Raspberry Pi
DS18B20 Temperature Sensor Module Product Overview
The DS18B20 Temperature Sensor Module is a high-precision digital thermometer module based on the DS18B20 digital temperature sensor from DALLAS Semiconductor (now Maxim Integrated). It utilizes a 1-Wire digital communication interface, requiring only one signal line for two-way communication with a microcontroller. The module features an onboard DS18B20 chip, a 3-pin header for easy sensor replacement, with all pins brought out and a built-in 4.7kΩ pull-up resistor. An onboard power LED indicates power status at a glance. With ultra-compact dimensions of just 21×10mm and a weight of only 1g, it is ideal for integration into various embedded projects. The module measures temperatures from -55℃ to +125℃ with an accuracy of ±0.5℃ in the -10℃ to +85℃ range. It is an ideal choice for temperature measurement, environmental monitoring, and temperature control applications on Arduino, Raspberry Pi, STM32, ESP8266/ESP32, and other development platforms.
DS18B20 Temperature Sensor Module Key Features
1-Wire Digital Interface for Simplest Wiring: The DS18B20 uses the DALLAS 1-Wire protocol, requiring only 1 I/O pin for two-way communication with a microcontroller. The module integrates the required 4.7kΩ pull-up resistor for the DQ signal line, eliminating the need for external resistors. For multi-point measurements, up to 8 DS18B20 sensors can be paralleled on a single bus.
High-Accuracy Wide-Temperature Measurement: Measures from -55℃ to +125℃. Accuracy of ±0.5℃ in the -10℃ to +85℃ range. Supports 9 to 12-bit user-configurable resolution.
Flexible Power & Mounting: Supports 3.0V to 5.5V wide voltage input, compatible with both 3.3V and 5V systems. Onboard DS18B20 chip with 3-pin header for easy sensor replacement. Ultra-compact 21×10mm, weighing only 1g. Each DS18B20 has a unique 64-bit ROM address for multi-point networking.
Complete Onboard Resources: All pins (VDD, DQ, GND) are brought out. Onboard power LED for clear status indication. Plug-and-play, no soldering required.
DS18B20 Temperature Sensor Module Applications
The DS18B20 Temperature Sensor Module is widely used in:
Environmental Temperature Monitoring: Indoor/outdoor temperature collection, greenhouse control, laboratory monitoring
Industrial Temperature Control Systems: Temperature threshold alarms, smart temperature switches, overheat protection
Smart Home & IoT: Smart air conditioning control, heating systems, smart thermostats
Embedded Development & Education: Arduino/Raspberry Pi/STM32 temperature sensor tutorials
Multi-Point Temperature Systems: Grain storage monitoring, data center rack temperature monitoring
DIY Maker Projects: Smart fans, incubation systems, 3D printer heated bed monitoring
DS18B20 Temperature Sensor Module Key Advantages
1-Wire Interface Saves I/O Resources: Unlike analog sensors (e.g., LM35) that require ADC conversion, the DS18B20 outputs digital signals directly. Only 1 GPIO pin is needed.
Built-in Pull-up Resistor, Plug-and-Play: The module integrates the required 4.7kΩ pull-up resistor. No external resistors or breadboard wiring needed.
High Accuracy (±0.5℃) for Most Applications: Sufficient for environmental monitoring, industrial control, and smart home applications.
Multi-Point Networking with One MCU: Multiple DS18B20 sensors can be paralleled on one bus, each with a unique 64-bit ROM address for multi-channel temperature acquisition.
Wide Voltage Compatibility (3.3V/5V): Supports 3.0V to 5.5V, directly compatible with both 3.3V and 5V systems without level shifting.
Rich Software Ecosystem: Arduino has mature OneWire and DallasTemperature libraries, with extensive support for Raspberry Pi and ESP32. Abundant tutorials and project examples available online.
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FAQs:
1 What is this module
It is a DS18B20 temperature sensor module commonly used with microcontroller development boards temperature control switches and environmental temperature monitoring.
2 What interface and pins does it support
All chip pins are exposed through a 3P interface including VCC GND and DQ data lines for easy connection to microcontrollers.
3 What hardware features does this module have
It features an onboard DS18B20 chip and a 3P round socket for easy insertion. It also includes a built in pull up resistor and a power indicator light.
4 What are the benefits of the built in pull up resistor
The built in pull up resistor means users do not need to add an external pull up resistor allowing direct connection to microcontroller IO pins and simplifying wiring and circuit design.
5 What are the physical dimensions of the module
The module is very compact with dimensions of only 21 millimeters by 10 millimeters making it ideal for space constrained projects and prototyping.
6 What is the function of the power indicator
The onboard power indicator lights up when powered allowing users to quickly verify that the module is correctly connected to a power supply.
7 How to replace or insert the DS18B20 chip
The module provides a 3P round socket allowing you to easily insert or remove the DS18B20 chip directly making replacement very convenient.
8 What communication protocol does this module support
It uses the classic 1 Wire single bus protocol requiring only one data line connected to a microcontroller digital IO pin to transmit temperature data.
9 What are the supply voltage and temperature measurement range
It typically supports a DC supply voltage of 3 point 0V to 5 point 5V and the measurable temperature range covers minus 55 degrees Celsius to plus 125 degrees Celsius.
10 What applications is this module suitable for
It is widely used in smart temperature control switches refrigerator temperature control systems industrial equipment temperature monitoring smart home environmental sensing and DIY electronics projects.
- Model:
- DS18B20 Temperature Sensor Module
- Core IC:
- DS18B20
- Interface:
- 1-Wire
- Accuracy:
- ±0.5℃
- Operating Voltage:
- 3.0V ~ 5.5V
- Pull-up Resistor:
- 4.7kΩ
- Module Dimensions:
- 21 × 10mm
- Compatible Platforms:
- Arduino、STM32、ESP8266/ESP32
