https://wiki.jw-tech.eu/index.php?action=history&feed=atom&title=WSAL20168_%E2%80%93_SGP40_VOC_Sensor%2FenWSAL20168 – SGP40 VOC Sensor/en - Versionsgeschichte2026-10-23T21:32:21ZVersionsgeschichte dieser Seite in JW Tech WikiMediaWiki 1.43.9https://wiki.jw-tech.eu/index.php?title=WSAL20168_%E2%80%93_SGP40_VOC_Sensor/en&diff=2080&oldid=prevJWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex2026-09-05T22:42:24Z<p>Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex</p>
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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.<br />
<br />
== Summary ==<br />
The SGP40 VOC sensor is a digital sensing module for air quality monitoring that incorporates the SGP40 chip from Sensirion. It measures volatile organic compounds (VOCs) in the range of 0 to 1000 ppm ethanol equivalents and provides digital signals via an I2C bus for controlling air treatment devices.<br />
<br />
== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL20168 WSAL20168 – Digital SGP40 VOC (Volatile Organic Compounds) Gas Sensor, I2C Bus]<br />
<br />
== Technical overview ==<br />
* Measurement range: 0–1000 ppm ethanol equivalents<br />
* Communication: I2C with fixed address 0x59<br />
* Operating voltage: 3.3 V or 5 V thanks to onboard voltage translator<br />
* Response time: under 10 s (tau 63%)<br />
* Switch-on time: under 60 s<br />
* Dimensions: 27 x 20 mm; mounting hole 2.0 mm<br />
* Pinout: VCC, GND, SDA, SCL<br />
* Use cases: detection of smoke, gas emissions, emissions from construction materials, furniture, and home appliances<br />
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'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
sudo raspi-config<br />
sudo reboot<br />
wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.60.tar.gz<br />
tar zxvf bcm2835-1.60.tar.gz<br />
cd bcm2835-1.60/<br />
sudo ./configure<br />
sudo make<br />
sudo make check<br />
sudo make install<br />
sudo apt-get install wiringpi<br />
cd /tmp<br />
wget https://project-downloads.drogon.net/wiringpi-latest.deb<br />
sudo dpkg -i wiringpi-latest.deb<br />
gpio -v<br />
sudo apt-get install p7zip-full<br />
wget https://files.waveshare.com/upload/6/62/SGP40_Voc_Sensor_code.7z<br />
7z x SGP40_Voc_Sensor_code.7z -r -o./SGP40_Voc_Sensor_code<br />
sudo chmod 777 -R SGP40_Voc_Sensor_code<br />
cd SGP40_Voc_Sensor_code/RPI/c<br />
sudo make clean<br />
</syntaxhighlight><br />
<br />
== Notes and version constraints ==<br />
* Exact commands and library versions are version-sensitive; verify compatibility with your system before running them.<br />
* The module requires a warm-up phase after power-on; during this time the raw value slowly rises until it stabilizes.<br />
* The sensor is extremely sensitive to ethanol; under normal conditions the VOC reading is near zero unless strong contaminants are present.<br />
* If serial output stops or shows zero after startup: check hardware connections, ensuring SDA and SCL are not swapped; reconnect the sensor and rerun the program.<br />
* Raw data values cannot be directly converted to PPM or PPB; the Sensirion library is required for conversion.<br />
<br />
== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/SGP40_VOC_Sensor SGP40 VOC Sensor - Waveshare Wiki]<br />
* Source revision: 69092<br />
* Captured: 2026-09-02T03:28:20+00:00<br />
* SHA-256: <code>3d8869d67a4ffa0d1e134c55c453c0554c5bdbae0321cabbaa3a82f82f43c7e8</code></div>JWTechPublisher