https://github.com/veftodii/air-quality-monitor-assignment

IAW technical test assignment
https://github.com/veftodii/air-quality-monitor-assignment

air-quality-monitor embedded-systems esp32-idf iaw mqtt platformio

Last synced: 4 months ago
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IAW technical test assignment

• Host: GitHub
• URL: https://github.com/veftodii/air-quality-monitor-assignment
• Owner: veftodii
• License: mit
• Archived: true
• Created: 2024-09-06T09:44:09.000Z (4 months ago)
• Default Branch: main
• Last Pushed: 2024-09-12T15:58:41.000Z (4 months ago)
• Last Synced: 2024-09-21T06:31:40.953Z (4 months ago)
• Topics: air-quality-monitor, embedded-systems, esp32-idf, iaw, mqtt, platformio
• Language: C
• Homepage: https://iawgroup.de
• Size: 404 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
**Task:**

Create a program based on [ESP32](https://www.espressif.com/en/products/socs/esp32) to meassure the air quality and show it on a mobile application. Use [MQTT](https://mqtt.org) to publish the measured values. A temporary test MQTT server (message broker) is provided.

The program needs to measure the concentration of carbon monoxide using the MQ-7 gas sensor and detect smoke using the MQ-135 gas sensor.

> [!NOTE]

> This task description is approximate and is part of an interview for a 12-months internship in Germany.

**Screenshots of [Mqtt Dashboard](https://play.google.com/store/apps/details?id=com.app.vetru.mqttdashboard) Android application**

[screenshots/01.jpg](screenshots/01.jpg) - the carbon monoxide measured value (MQ-7).

[screenshots/02.jpg](screenshots/02.jpg) - broker connection settings.

**Photos**

[photos/01.jpg](photos/01.jpg) - devices connected with jumper wires (Dupont) on a breadboard.

[photos/02.jpg](photos/02.jpg) - MQ gas sensor PCB.

**Logs**

[logs/AQM.log](logs/AQM.log) - extract from [PlatformIO](https://platformio.org) monitor. Lines 79-87 show the MQ-7 and MQ-135 measured values and a text about the published MQTT message.

> [!IMPORTANT]

> You may need to create your own server (MQTT message broker) and set the connection details (username, password, and server address) into `MQTT_SERVER_URL` pre-processor macro.

> 

> Assign your Wi-Fi details to `WIFI_SSID` and `WIFI_PASSWORD`.