# Adafruit's Raspberry Pi Lesson 11. DS18B20 Temperature Sensing ## Overview The Raspbian distribution includes support for the DS18B20 1-wire temperature sensor. These sensors come in a small three pin package like a transistor and are accurate digital devices. ![](https://cdn-learn.adafruit.com/assets/assets/000/003/775/medium800/learn_raspberry_pi_summary.jpg?1396801585) In this lesson, you will learn how to use a DS18B20 with the Raspberry Pi to take temperature readings. Since the Raspberry Pi has no ADC (Analog to Digital Converter), it cannot directly use an analog temperature sensor like the TMP36, making the DS18B20 a good choice for temperature sensing. - [Next Page](https://learn.adafruit.com/adafruits-raspberry-pi-lesson-11-ds18b20-temperature-sensing/hardware.md) ## Featured Products ### DS18B20 Digital temperature sensor + extras [DS18B20 Digital temperature sensor + extras](https://www.adafruit.com/product/374) These 1-wire digital temperature sensors are fairly precise (±0.5°C over much of the range) and can give up to 12 bits of precision from the onboard digital-to-analog converter. They work great with any microcontroller using a single digital pin, and you can even connect multiple... In Stock [Buy Now](https://www.adafruit.com/product/374) [Related Guides to the Product](https://learn.adafruit.com/products/374/guides) ### Waterproof 1-Wire DS18B20 Digital temperature sensor [Waterproof 1-Wire DS18B20 Digital temperature sensor](https://www.adafruit.com/product/381) This is a pre-wired and waterproofed (with heat shrink) version of a 1 Wire DS18B20 sensor. Handy for when you need to measure something far away, or in wet conditions. While the sensor is good up to 125°C the cable is jacketed in PVC so we suggest keeping it under 100°C. Because they... In Stock [Buy Now](https://www.adafruit.com/product/381) [Related Guides to the Product](https://learn.adafruit.com/products/381/guides) ### High Temp Waterproof DS18B20 Digital temperature sensor + extras [High Temp Waterproof DS18B20 Digital temperature sensor + extras](https://www.adafruit.com/product/642) This is a pre-wired and waterproofed version of the DS18B20 sensor made with a PTFE wire cable. Handy for when you need to measure something far away, or in wet conditions. This sensor is a little more expensive than [the other waterproof version...](http://www.adafruit.com/products/381) In Stock [Buy Now](https://www.adafruit.com/product/642) [Related Guides to the Product](https://learn.adafruit.com/products/642/guides) ### Assembled Pi Cobbler Plus - Breakout Cable [Assembled Pi Cobbler Plus - Breakout Cable](https://www.adafruit.com/product/2029) The Raspberry Pi B+ / Pi 2 / Pi 3 / Pi 4 has landed on the Maker World like a 40-GPIO pinned, quad-USB ported, credit card sized bomb of DIY joy. And while you can use most of our great Model B accessories by hooking up our [downgrade...](https://www.adafruit.com/product/1986) In Stock [Buy Now](https://www.adafruit.com/product/2029) [Related Guides to the Product](https://learn.adafruit.com/products/2029/guides) ### Assembled Pi T-Cobbler Plus - GPIO Breakout [Assembled Pi T-Cobbler Plus - GPIO Breakout](https://www.adafruit.com/product/2028) **This is the assembled version of the Pi T-Cobbler Plus.  It only works with the Raspberry Pi Model Zero, A+, B+, Pi 2, Pi 3, Pi 4, and Pi 5!** (Any Pi with 2x20 connector) The Raspberry Pi has landed on the Maker World like a 40-GPIO pinned, quad-USB ported,... In Stock [Buy Now](https://www.adafruit.com/product/2028) [Related Guides to the Product](https://learn.adafruit.com/products/2028/guides) ### Budget Pack for Raspberry Pi 1 Model B (Doesn't include RasPi) [Budget Pack for Raspberry Pi 1 Model B (Doesn't include RasPi)](https://www.adafruit.com/product/965) An optimized collection of parts and pieces to experiment with Raspberry Pi at home, school or work. Great for students and those that want to get their feet wet, no soldering required! **THIS PACK DOES NOT INCLUDE A RASPBERRY PI 1 MODEL B and is NOT compatible with Model B+ or Raspberry Pi...** No Longer Stocked [Buy Now](https://www.adafruit.com/product/965) [Related Guides to the Product](https://learn.adafruit.com/products/965/guides) ### Raspberry Pi 3 - Model B+ - 1.4GHz Cortex-A53 with 1GB RAM [Raspberry Pi 3 - Model B+ - 1.4GHz Cortex-A53 with 1GB RAM](https://www.adafruit.com/product/3775) The Raspberry Pi 3 Model B is the most popular Raspberry Pi computer made, and the Pi Foundation knows you can always make a good thing _better_! And what could make the Pi 3 better? How about a _faster_ processor, 5 GHz WiFi, and updated Ethernet chip with PoE capability?... In Stock [Buy Now](https://www.adafruit.com/product/3775) [Related Guides to the Product](https://learn.adafruit.com/products/3775/guides) ### Half Sized Premium Breadboard - 400 Tie Points [Half Sized Premium Breadboard - 400 Tie Points](https://www.adafruit.com/product/64) This is a cute, half-size breadboard with 400 tie points, good for small projects. It's 3.25" x 2.2" / 8.3cm x 5.5cm with a standard double-strip in the middle and two power rails on both sides. You can pull the power rails off easily to make the breadboard as... Out of Stock [Buy Now](https://www.adafruit.com/product/64) [Related Guides to the Product](https://learn.adafruit.com/products/64/guides) ## Related Guides - [Basic Resistor Sensor Reading on Raspberry Pi](https://learn.adafruit.com/basic-resistor-sensor-reading-on-raspberry-pi.md) - [Adafruit's Raspberry Pi Lesson 4. GPIO Setup](https://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup.md) - [Circadian Pi Desk Light](https://learn.adafruit.com/circadian-pi-desk-light.md) - [Playing sounds and using buttons with Raspberry Pi](https://learn.adafruit.com/playing-sounds-and-using-buttons-with-raspberry-pi.md) - [Adafruit's Raspberry Pi Lesson 12. Sensing Movement](https://learn.adafruit.com/adafruits-raspberry-pi-lesson-12-sensing-movement.md) - [Windows IoT Core Application Development: Headed Blinky](https://learn.adafruit.com/windows-iot-application-development-headed-blinky.md) - [Speech Synthesis on the Raspberry Pi](https://learn.adafruit.com/speech-synthesis-on-the-raspberry-pi.md) - [LoRa and LoRaWAN Radio for Raspberry Pi](https://learn.adafruit.com/lora-and-lorawan-radio-for-raspberry-pi.md) - [Single Channel LoRaWAN Gateway for Raspberry Pi](https://learn.adafruit.com/raspberry-pi-single-channel-lorawan-gateway.md) - [Drive a 16x2 LCD with the Raspberry Pi](https://learn.adafruit.com/drive-a-16x2-lcd-directly-with-a-raspberry-pi.md) - [Adafruit's Raspberry Pi Lesson 13. Power Control](https://learn.adafruit.com/adafruits-raspberry-pi-lesson-13-power-control.md) - [Raspberry Pi E-mail Notifier Using LEDs](https://learn.adafruit.com/raspberry-pi-e-mail-notifier-using-leds.md) - [CircuitPython Libraries on Linux and ODROID C2](https://learn.adafruit.com/circuitpython-libaries-linux-odroid-c2.md) - [Raspberry Pi LED Matrix Display](https://learn.adafruit.com/raspberry-pi-led-matrix-display.md) - [PicoDVI Adafruit IO Feed Dashboard](https://learn.adafruit.com/dvi-io.md)