https://wiki.jw-tech.eu/index.php?action=history&feed=atom&title=9531_%E2%80%93_MQ-5_Gas_Sensor%2Fen9531 – MQ-5 Gas Sensor/en - Versionsgeschichte2026-10-23T22:30:37ZVersionsgeschichte dieser Seite in JW Tech WikiMediaWiki 1.43.9https://wiki.jw-tech.eu/index.php?title=9531_%E2%80%93_MQ-5_Gas_Sensor/en&diff=1518&oldid=prevJWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex2026-09-05T22:31:32Z<p>Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex</p>
<p><b>Neue Seite</b></p><div>__NOINDEX__<br />
'''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 MQ-5 uses tin dioxide (SnO2) as the sensitive material. Conductivity rises with the concentration of flammable gases such as butane, propane and methane. The module provides an analog output (AOUT) and a digital threshold output (DOUT).<br />
<br />
== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/9531 9531 – MQ-5 Gas Sensor]<br />
* [https://shop.jw-tech.eu/p/WSAL9531 WSAL9531 – MQ-5 Gas Sensor]<br />
<br />
== Technical overview ==<br />
* Operating voltage: 2.5 V to 5.0 V.<br />
* Module size: 40.0 mm × 21.0 mm; mounting hole diameter 2.0 mm.<br />
* Pins: VCC, GND, AOUT (analog), DOUT (digital).<br />
* Raspberry Pi Pico wiring: VCC → 3.3 V, GND → GND, AOUT → GP26, DOUT → GP22.<br />
* STM32F103RBT6 wiring: VCC → 3.3 V, GND → GND, AOUT → PA6, DOUT → PA4.<br />
* Arduino UNO wiring: VCC → 5 V, GND → GND, AOUT → A0, DOUT → D2.<br />
* Example projects are provided for Pico (C/C++ and MicroPython), STM32 (HAL library, Keil) and Arduino IDE.<br />
* The module needs about one minute of preheat time so the sensitive material reaches operating temperature.<br />
<br />
'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
sudo apt-get install p7zip-full<br />
cd ~<br />
sudo wget https://files.waveshare.com/upload/6/63/MQ-5-Gas-Sensor-code.7z<br />
7z x MQ-5-Gas-Sensor-code.7z -o./MQ-5-Gas-Sensor-code<br />
cd ~/MQ-5-Gas-Sensor-code/Pico/c/<br />
cmake ..<br />
make -j9<br />
cp main.uf2 /media/pi/RPI-RP2/<br />
</syntaxhighlight><br />
<br />
== Notes and version constraints ==<br />
* The provided examples are based on fixed boards (Pico, STM32F103RB, Arduino UNO). For other boards, connections and code may need adaptation.<br />
* For the Pico, suitable firmware must be flashed first; the exact firmware version depends on the example archive.<br />
* The exact threshold setting of the digital output is not described in the source; please verify against the datasheet.<br />
* No calibration, accuracy or certification data are given in the source; do not state values that are not present.<br />
<br />
== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/MQ-5_Gas_Sensor MQ-5 Gas Sensor - Waveshare Wiki]<br />
* Source revision: 68897<br />
* Captured: 2026-08-29T09:42:28+00:00<br />
* SHA-256: <code>386a9d43b360c7be35d137f839960a2f98c4405552bb9629a004c07a869c9822</code></div>JWTechPublisher