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Learn about top temperature sensing components for Raspberry Pi: comparison, wiring tips, and SA stock advice from Communica. Find sensors for education, makers, and industry.
DS18B20, DHT22, MCP9808, and thermistors explained for Pi compatibility.
How to choose, wire, and troubleshoot sensors with real-world examples.
Where to find sensors, brands, and support for your next Raspberry Pi build.
Temperature measurement is essential in Raspberry Pi-based projects for environmental monitoring, smart homes, server protection, and STEM learning. Makers, students, and engineers in South Africa often require sensors that are easy to integrate, precise, and readily available from local suppliers. This guide covers the most reliable and cost-effective temperature sensors compatible with Raspberry Pi, focusing on everyday use cases and sourcing from Communica's extensive range.
| Sensor | Interface | Accuracy | Range ( degreesC) | Example Use |
|---|---|---|---|---|
| DS18B20 | 1-Wire (Digital) | 0.5 degreesC | -55 to +125 | Aquariums, outdoors |
| DHT22/AM2302 | Digital | 0.5 degreesC | -40 to +80 | IoT, HVAC, weather |
| MCP9808 | I2C | 0.25 degreesC | -40 to +125 | Lab, calibration |
| NTC Thermistor | Analog (via ADC) | 1 degreesC | -40 to +100 | DIY, budget |
Each sensor type offers different benefits. Digital options like the DS18B20 are ideal for long runs and noise resistance. Analog thermistors are affordable and widely used in entry-level educational projects.
| Sensor | Wiring Notes | Typical Application |
|---|---|---|
| DS18B20 | Connect to 3.3V, GND, and one GPIO; add 4.7kOhm pull-up resistor between VCC and Data | Multiple remote temperature points |
| DHT22 | Connect Data to GPIO via 10kOhm pull-up; power from 3.3V for Pi compatibility | Room or environmental monitoring |
| MCP9808 | Wire SDA/SCL to Pi I2C pins (GPIO 2/3), use built-in I2C pull-ups if available | High-accuracy tasks |
| NTC Thermistor | Requires resistor divider, connect to ADC module (e.g., MCP3008), then Pi via SPI | DIY experiments, education kits |
Tip: For outdoor or industrial monitoring in South Africa, choose waterproof sensor modules or enclosures (also available at Communica) to withstand local environmental conditions.
For an NTC thermistor and voltage divider (using a reference resistor, Rref):
Vout = Vin x (Rntc / (Rntc + Rref))
Use the measured voltage to calculate Rntc, then apply the Steinhart-Hart equation for temperature conversion. For quick prototyping, ready-made ADC modules like the MCP3008 reduce the setup time.
raspi-config).All sensor modules, ADCs, and supporting hardware are available for browsing and in-person collection at Communica's main branches in Pretoria CBD, Samrand, and Cape Town. Check the website or call ahead for student specials and academic stock.
Free shipping for orders over ZAR 1,000.00.
Get a full refund if you had the product for less than 7 days.
Nationwide delivery within 2 - 4 working days.
Communica supplies semiconductors and electronic components to industries such as automotive, electrical, automation, mining, and education.
Disclaimer: This content is for educational purposes only. Product availability, pricing, and specifications are subject to change. Always verify current details on the retailer's website before making a purchase. We may earn affiliate commissions from qualifying purchases.
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Verified customerNicolene
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I visit Communica once in a blue moon. Always wish i have more time to look at everything. Good & friendly service. Nothing wrong with a queuing syste...
Currently have only purchased items from their on-line store. Received what I ordered plus quick delivery. No complaints to date.
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I got the most pleasant service from Sydney and Windie
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