The Citizen Science Atmospheric Sensor is based upon Arduino devices coupled with the Bosch BME 280 atmospheric sensor. The device has built in WiFi connectivity, internal voltage monitoring and a PCB trace antenna. It provides an inexpensive low power method to monitor atmospheric conditions (temperature, pressure and relative humidity) within the range of a WIFI access point. Three standard AA alkaline batteries provide enough power to measure and send data to a cloud-based server (AWS) once every hour, with real time telemetry. The design, construction and implementation of this technology was provided by Protostudios, a part of the University of Iowa's Department of Innovation and Economic Development.
As soon as the sensor is turned on and connected to a WiFi access point, it starts by measuring weather conditions once per minute in a period of 15 minutes. After this period, the sensor switches to monitor data hourly. This is to make sure the user can check and see if the sensor is working properly during setup. The hourly timeframe was chosen so that the sensor can provide acceptable data and preserve battery.
In order to connect the sensor, fill out the required information below:
After you save, the sensor should reboot, every time it sends a measurement, the light indicator will blink blue.
If at some point your sensor isn’t sending measurements, it may be because the batteries need to be replaced (watch video below), or the Wi-Fi network can’t be reached due to the SSID changed (either you change it manually, you got a new internet service, or moved the sensor to a new location with a new Wi-Fi network); in both cases you need to relaunch the sensor. If it's the batteries, turn the sensor off, replace the batteries and relaunch the sensor, if it’s the SSID just relaunch the device. The relaunching process consists in following steps 1-4 (described above), by filling out just the SSID and password, as shown below in Fig. 7, and re-entering any new information (if the location of the sensor changed).
Since the sensor is going to be outside, it is important to mount it in the correct way, or else risk the weather or animals from damaging it. Here are some tips for mounting the sensor.
Once the sensor starts sending data to the cloud, the data can be downloaded and seen at this website
Jun Wang, Univ. of Iowa
Phone: 319-353-4483
Professor in Chemical & Environmental Engineering, & Physics
Assistant Director for CCAD, http://www.ccad.uiowa.edu
ARROMA Lab, https://arroma.uiowa.edu
Interdisciplinary Graduate Program in Geo-Informatics & Applied Math
4133 Seamans Center, Iowa City, IA 52242-1503
Email: jun-wang-1@uiowa.edu
Lorena Castro García (PhD)
Postdoctoral Research Associated
Chemical and Biochemical Engineering & Center for Global and Regional Environmental Research
University of Iowa
Office: 402 IATL
Email: lcastrogarcia@uiowa.edu