LoRaWAN fine dust sensor

Battery-operated LPWAN particulate matter (PM10 & PM2.5), temperature and NOx sensor

The sensor

Everyone is talking about particulate matter. In order to make reliable statements about the level of pollution, the area coverage of state Measuring stations often not enough for cost reasons. This is why the first private Projects/initiatives who use inexpensive hardware and open source software to build their own measuring stations that measure particulate matter, humidity and temperature. These DIY stations often require an external power supply and access to Wi-Fi, which limits the range of applications, e.g. near busy roads. Of course, the absolute measuring accuracy of such low-cost sensors, such as ours, cannot be compared with calibrated air measuring stations. Nevertheless, the sensors allow extremely cost-effective, comprehensive live monitoring of changes in air quality (particulate matter and nitrogen oxides).

As a specialist for extremely energy-saving LPWAN IoT solutions, Lobaro has developed a cost-effective battery-powered sensor that measures air quality data via LoRaWAN to the The Things Network sends. Unlike many other low-cost sensors, our version also measures the nitrogen oxide (NOx) concentration in the ambient air. The hardware was designed by us in just a few days and made available free of charge to a geology student at the University of Hamburg to carry out his master's thesis. With a battery life of more than one year (quiescent current < 10uA!) and a LoRaWAN range of up to 10km, entire city districts can be permanently monitored without major installation effort. The fine dust values and other ambient data (temperature, nitrogen dioxide concentration) are recorded in the Lobaro backend and made available via a simple Excel export. Once the above-mentioned master's thesis has been completed, the results will also be published here.

Services

Lobaro not only provides the hardware, but can also help you with the Installation, data collection and evaluation.

The data acquisition can be customized to your application. Short or long-term monitoring, different measuring intervals, ... we help you to find the right parameters.

Our customers regularly benefit from improvements to the hardware, as the basic elements of the Lobaro box is also regularly expanded and improved in other projects.

Master thesis

The hardware was developed as part of Torben Kraft's master's thesis from 24.04.2018.

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LoRaWAN PM10 PM2.5 sensor backend

Keywords

  • Mobile particulate matter sensor
  • Radio technology
    LoRaWAN 1.1 radio protocol
    No GSM necessary
    Alternative: GSM / UMTS / LTE 4G / NB-IoT gateways
  • Power supply
    a) 1x lithium battery (3.6V)
    Alternatively also 5V external supply
  • Sensors
    Nova Fitness SDS011 (PM10/PM2.5)
    SGX Sensortech MiCs-2714 (NOx)
    DS18B20 (temperature)
    + Bus for ext. humidity sensor
  • Query / Trigger
    Time-controlled
    Alarm based
    Active via LoRa
  • Antenna
    Internal + u.fl solder pad (for optional ext. antenna)
  • Housing
    Waterproof
    Other designs on request