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This FAQ section is a way for us to share answers to frequently asked questions with the worldwide AirCasting community. If you have a question and don't see your answer here, please email us at info@habitatmap.org so we can continue to expand and share our knowledge base. You can also connect with us via the Facebook AirCasting Community
Yes, email us at info@habitatmap.org with the following information and we will invoice you accordingly: 1) How many AirBeam2s would you like to order? 2) What is your shipping address? 3) Do you prefer to pay by check, wire transfer, or credit card (via PayPal)? 4) By what date would you like to receive your AirBeam2s?
Yes, email us at info@habitatmap.org with the following information and we will invoice you accordingly: 1) How many AirBeam2s would you like to order? 2) What is your shipping address? 3) Do you prefer to pay by check or wire transfer? Note that foreign checks must be denominated in US dollars.
We only accept credit card payments via PayPal. Note that you do not need a PayPal account in order to purchase AirBeams via PayPal.
No, HabitatMap does not accept purchase orders.
No, HabitatMap only accepts payment in US dollars.
AirBeam2 is “quite accurate” according to the performance evaluation conducted by South Coast Air Quality Management District’s AQ-SPEC lab. Another AirBeam2 performance evaluation, conducted by researchers at NYU School of Medicine, also found that the PM2.5 measurements from the AirBeam2 closely matched those from a collocated reference instrument.
Yes, the AirBeam2 is designed to go wherever you go, unless you’re going underwater : ) When cycling or driving, face the AirBeam2 intake and exhaust ports (the perforations located between the wavy edges) away from your direction of travel to minimize wind interference.
Yes, the AirBeam2 is designed to go wherever you go, unless you’re going underwater : ) When cycling or driving, face the AirBeam2 intake and exhaust ports (the perforations located between the wavy edges) away from your direction of travel to minimize wind interference.
Buy two AirBeam2s, configure them both to record fixed sessions, and place one inside and the other outside. Keep tabs on the particulate matter measurements in real-time using the AirCasting app or website. When the air quality is better outside than inside, open your windows. When the air quality is better inside than outside, keep your windows closed.
Long-term exposure to fine particulate matter or PM2.5 has been linked to a range of health problems including asthma and respiratory inflammation, lung cancer, heart attack, and stroke. The U.S. Environmental Protection Agency establishes the National Ambient Air Quality Standards (NAAQS) and Air Quality Index (AQI) on the best science available, which typically uses averaging time periods of 24 hours or longer when examining PM2.5 data and relating it to health outcomes. The AirCasting app and website uses the NAAQS standards for PM2.5 exposure and the AQI to relate colors to measurements: 0-12 ug/m3 is green, 13-35 ug/m3 is yellow, 36-55 ug/m3 is orange, and 55-150 ug/m3 is red. (The relationship between colors and measurements can be changed inside the AirCasting app and website.) These ranges/colors roughly correspond to increased health risks as the concentration of PM2.5 in the environment rises. However, there are some big caveats that should be noted. First, data shows that health effects occur at levels well below current regulatory thresholds, especially for the most toxic aerosols, like those from diesel exhaust. Second, as mentioned, most health studies have primarily examined long-term exposures to air pollution, not short-term exposures, leaving the potential health implications of such exposures unclear. Current health studies are only just beginning to establish the relationships between short-term exposures to fine and ultra-fine particles and health effects, including blood inflammation and increased likelihood of heart attack. Third, because the AirBeam2 does not meet the US government’s performance or quality assurance requirements (there are no Federal Equivalency Method or Federal Reference Method low-cost, mobile instruments for measuring PM2.5 on the market) this introduces uncertainty in the interpretation of the AirBeam2’s particle measurements.
(o) A fully charged AirBeam2. You’ll know it’s fully charged when the green charging indicator turns off.
(o) An Android phone or tablet. For advice on what Android device’s work best see “What Android devices work best with the AirCasting app?”
(o) Access to Google Play to download the AirCasting app. Certain Android devices, like those made by Amazon, do not have access to the Google Play store.
(o) A cellular or WiFi connection for your Android device.
(o) If you plan to record a fixed-WiFi session, you’ll need access to a wireless router with a 2.4 GHz band.
(o) If you plan to record a fixed-cellular session, you’ll need a SIM card that provides 2G service and access to a 2G cellular network.
The AirBeam2 has two LEDs. One serves as the battery-charging indicator and the other serves as the connection indicator. The battery-charging indicator is located closest to the USB charging port. When it’s green, the battery is charging and when it turns off the battery is fully charged. The connection indicator is located closest to the power button. Red indicates the AirBeam2 is getting set-up, green indicates that it’s ready to be configured, blue indicates it’s getting the time (this is only for fixed sessions), white indicates it’s sending data, and blinking red indicates the AirBeam2 is disconnected from the Android device (this is only for mobile sessions). Note that after glowing white for two minutes to indicate that the AirBeam2 is successfully sending data, the connection indicator will turn off to conserve battery power. Also note that the AirBeam2 has a configuration window of 50 seconds after which the AirBeam2 will default to its previously selected configuration.
If you plan on moving around with the AirBeam2 while recording air quality measurements, configure the AirBeam2 to record a mobile session. When recording a mobile AirCasting session, measurements are created, timestamped, and geolocated once per second. If you plan to leave the AirBeam2 indoors or hang it outside then configure it to record a fixed session. When recording fixed AirCasting sessions, measurements are created and timestamped once per minute and geocoordinates are fixed to a set location. Fixed-WiFi sessions send data to the AirCasting website via the 2.4 GHz band of your wireless router. Fixed-cellular sessions send data to the AirCasting website via the 2G cellular network. There are three primary differences between fixed and mobile sessions: 1) The averaging time interval for mobile sessions is one-second, whereas the averaging time interval for fixed sessions is one-minute; 2) geocoordinates are updated every second when recording a mobile session, whereas geocoordinates are never updated when recording a fixed session; and 3) measurements are communicated to the AirCasting Android app via Bluetooth when recording a mobile session, whereas measurements are communicated directly to the AirCasting website via either the WiFi network or cellular network when recording a fixed session.
If you want to record a mobile session and you’re device is not already connected to the AirCasting app, you’ll need to connect it. You’ll know your AirBeam2 is connected to your Android device when you see five grey circles stacked on top of one another inside the AirCasting app Dashboard. Press the record button in the upper right hand corner to begin recording a mobile AirCasting session. Once you configure an AirBeam2 to record a fixed session, it will send data to the AirCasting website every minute until you turn it off. When recording a fixed session, the measurements are communicated once a minute to the AirCasting website via your wireless router or the cellular network. Your Android device no longer needs to be in proximity to the AirBeam2 as it’s retrieving the data from the web via the Android device’s WiFi or cellular connection.
All wireless routers have a 2.4 GHz band, however, you’re wireless router’s 2.4 GHz band might not be setup. Many newer routers are dual band, offering both 2.4 GHz and 5GHz bands. If you have a dual band router, make sure the 2.4 GHz band is setup and the AirBeam2 is accessing that band when configuring the AirBeam2 to record a fixed-WiFi session.
Many low cost carriers, like Ting, offer cheap SIM cards and low-cost month-to-month cellular service. Check with your cellular provider to find out if they offer 2G service. If they do offer 2G service, check their coverage maps to see if they offer 2G service in your location.
If you haven’t reconfigured your AirBeam2 then simply turn it on and it will load the last selected configuration and continue streaming under the same session title. If you subsequently reconfigured the AirBeam2, navigate to the Sessions screen, tap the title of the fixed session you want to continue, tap “Continue Streaming”, and navigate through the configuration decision tree.
The AirCasting app can record the AirBeam measurements and sync your session data over WiFi without need for a cellular data plan. The only thing that won't work is that the map tiles inside the app won't load when you’re away from WiFi and without a data plan. You don't have to do anything special; just use the app as you normally would. The only challenge to not having the map tiles is that it's difficult to confirm that you have an accurate GPS fix. Here is what we suggest, since you won't have cellular service. 1) When you have access to WiFi confirm that your location is accurate on the map. If it's not accurate get outside if you can, if that's not possible, then place your phone near a window. 2) Once you've confirmed your location is accurate, zoom in on the map until the screen shows only your immediate blocks. 3) Once you've stepped outside and started recording, make sure the colored dots displayed on the screen create a trail. If the dots are being layed down directly on top of one another you don't have a proper GPS fix as it's not registering your movement.
Once you configure an AirBeam2 to record a fixed session, it will send data to the AirCasting website every minute until you turn it off. You don't need to do anything if the WiFi connection is dropped. Simply restore the WiFi signal and the data will continue streaming.
Your Android device needs to come equipped with Bluetooth and GPS and have access to the Google Play store. (Certain Android devices, like those made by Amazon, do not have access to the Google Play store.) In addition, it’s best to use an Android device with 2GB of RAM or more. Mobile AirBeam measurements are stored in RAM. Since the AirBeam2 records 300 data points a minute when operating in mobile mode, this adds up fast. The more RAM your Android device has, the longer it will be able to record a mobile AirCasting session before filling up and crashing the app. (Don’t worry if this happens, your data will be saved before the app crashes.) Beyond suggesting Android devices with sufficient RAM, we also recommend buying Android devices that cost $100 or more because you get what you pay for. The price of an Android device is frequently a better indicator of compatibility with the AirCasting app than the hardware and software specifications alone because more expensive Android devices are generally better built. If you plan to buy multiple Android devices, buy one device and test thoroughly with the AirCasting app before buying multiples.
Approximately 450 megabytes per month.
When powered and running 24/7, the AirBeam consumes less than a nickel’s worth of electricity in a month.
(o) Is the Android device’s Bluetooth on?
(o) Did you first pair the AirBeam2 to your Android device via the Android device’s Bluetooth settings?
(o) After powering on the AirBeam2, did you wait until the “connection indicator” turned from red to green before immediately pressing “Configure AirBeam2”? If not, turn off your AirBeam and press “Configure AirBeam2” immediately after the “connection indicator” turns from red to green.
(o) Is the AirBeam fully charged? If not, turn it off, fully charge it, and try again.
(o) Does the unique identifier of the AirBeam2 match the AirBeam2 you selected from the list of “Available Devices”? If you have multiple AirBeam2s, we recommend labeling them with the last 4 characters of their unique identifier to avoid any confusion when connecting AirBeam2s to Android devices.
Did you press the record button located in the upper right hand corner of the AirCasting app. You’ll know you’re recording when the grey circles take on color.
A fixed-WiFi session communicates data via the 2.4 GHz WiFi network. A fixed-cellular session communicates data via the 2G cellular network and requires the insertion of an activated SIM card.
(o) Are you attempting to connect the AirBeam2 to a firewall protected 2.4 GHz network? The AirBeam2 cannot connect to 5 GHz WiFi networks or those with firewalls, like most public WiFi networks or those at schools and universities.
(o) Did you enter the correct password? Double check to make sure your Android device isn’t auto-correcting your entry to the wrong password.
(o) Is the Android device’s Bluetooth on?
(o) Did you first pair the AirBeam2 to your Android device via the Android device’s Bluetooth settings?
(o) After powering on the AirBeam2, did you wait until the “connection indicator” LED turned from red to green before immediately pressing “Configure AirBeam2”? If not, turn off your AirBeam and press “Configure AirBeam2” immediately after the “connection indicator” LED turns from red to green
(o) Is the AirBeam fully charged? If not, turn it off, fully charge it, and try again.
(o) Does the unique identifier of the AirBeam2 match the AirBeam2 you selected from the list of “Available Devices”? If you have multiple AirBeam2s, we recommend labeling them with the last 4 characters of their unique identifier to avoid any confusion when connecting AirBeam2s to Android devices.
(o) Is your Android device connected to the Internet via cellular or WiFi?
(o) Did you open the enclosure, push down and lift up the SIM card slot, slide in an active SIM card, and properly close the SIM card slot?
(o) The AirBeam2 sends cellular data via the 2G network. Does your SIM card grant access to a 2G network?
(o) You may not have 2G reception where you are; try moving to another location.
(o) Is the Android device’s Bluetooth on?
(o) Did you first pair the AirBeam2 to your Android device via the Android device’s Bluetooth settings?
(o) After powering on the AirBeam2, did you wait until the “connection indicator” LED turned from red to green before immediately pressing “Configure AirBeam2”? If not, turn off your AirBeam and press “Configure AirBeam2” immediately after the “connection indicator” LED turned from red to green.
(o) Is the AirBeam fully charged? If not, turn it off, fully charge it, and try again.
(o) Does the unique identifier of the AirBeam2 match the AirBeam2 you selected from the list of “Available Devices”? If you have multiple AirBeam2s, we recommend labeling them with the last 4 characters of their unique identifier to avoid any confusion when connecting AirBeam2s to Android devices.
(o) Is your Android device connected to the Internet via cellular or WiFi?
AirBeam2 includes an internal battery so it will continue operating for approximately ten hours before shutting down for lack of power. Note that when the battery is less than half charged, AirBeam2 cannot operate and charge at the same time. If you’re AirBeam2 is recording a fixed session when it accidently gets unplugged (and if you suspect the battery is less than half charged) then turn off your AirBeam, plug it back in, and wait for it to fully charge before turning it back on.
Nothing happens. If you’re recording a mobile session, the AirBeam2 will remain connected to the Android device and your data will continue to be recorded. If you’re recording a fixed session, the streams on your dashboard will update when you access the app again.
Inside the AirCasting app, navigate to “Settings” and check “Dormant stream alert”. If your AirBeam2 stops streaming you will receive an email alert.
(o) Is your Android device connected to the Internet via cellular or WiFi?
(o) Is the email address you’re using to create a profile linked to a previously created AirCasting profile?
(o) Did you forget your password? If so, use the forgot password feature to reset your password.
AirBeam2 measures the temperature and relative humidity inside the AirBeam2 enclosure. These measurements are accurate but they are not representative of the ambient temperature and relative humidity.
We are committed to making the AirCasting app work on as many Android devices as possible. The challenge is, there are thousands of Android devices on the market and we only have the resources to buy and test a small fraction of them for compatibility with the AirCasting app. If the AirCasting app is crashing on your device please email us at info@habitatmap.org and let us know what screen you were on and what you were doing when the app crashed. This will help us zero in on the problem. Having said that, there are some Android devices we can’t support. If your Android device can’t smoothly run the Google Maps app then it won’t be possible for us to optimize the AirCasting app for your device.
Launch the AirCasting app and tap “Connect phone mic”. Then press the record button located in the upper right hand corner of the AirCasting app. You’ll know you’re recording when the grey circle takes on color.
Navigate to the AirCasting maps page and use the search filters.
An AirCasting session is defined by the period of time during which measurements are recorded. Mobile sessions begin when you press the start recording button inside the AirCasting app and end when you press the stop recording button. Fixed AirCasting sessions begin when the first measurement is communicated to AirCasting website and do not have a set end time, i.e. fixed sessions that have stopped sending new measurements to the AirCasting website can be continued at anytime once new measurements are sent.
When recording a mobile AirCasting session, measurements are created, timestamped, and geolocated once per second. When recording fixed AirCasting sessions, measurements are created and timestamped once per minute and geocoordinates are fixed to a set location. There are three primary differences between fixed and mobile sessions: 1) The averaging time interval for mobile sessions is one-second, whereas the averaging time interval for fixed sessions is one-minute; 2) geocoordinates are updated every second when recording a mobile session, whereas geocoordinates are never updated when recording a fixed session; and 3) measurements are communicated to the AirCasting Android app via Bluetooth when recording a mobile session, whereas measurements are communicated directly to the AirCasting website via either the WiFi network or cellular network when recording a fixed session.
(o) Have you signed in or created a profile yet? If not, do so by tapping the menu icon in the upper left hand corner of the AirCasting app, then press “Create Profile or Log In”?
(o) Is your Android device connected to the Internet via the WiFi or cellular network? If not, you’ll need to connect your Android to the Internet then navigate to the sessions screen and pull down to sync your sessions from the AirCasting app to the AirCasting website.
(o) Navigate to the sessions screen and pull down to sync your sessions from the AirCasting app to the AirCasting website.
(o) When you were recording a session, was the phone’s “location services” on and in “high accuracy” mode? Sessions without geocoordinates can’t be synced to the AirCasting website.
Did you confirm your location was accurate on the map before starting to record? To do this, tap a stream on the dashboard, select “Map”, and then tap the target icon in the lower right hand corner to center the map on top of your current location. If you’re inside, try going outside.
The sessions list is arrayed horizontally along the bottom of the AirCasting maps page. The sessions list contains all the sessions that match your current search criteria.
The CrowdMap averages together all the measurements from all the sessions listed on the sessions list and displays these averages as colored grid cells. The color of each grid cell corresponds to the average intensity of all the measurements recorded in that area. To view the CrowdMap navigate to AirCasting maps page, search for the sessions you want to visualize on the CrowdMap, then under “CrowdMap” click “on”. If you’d like to increase or decrease the size of the CrowdMap grid cell size, adjust the “grid cell size” slider. Click on a grid cell to view the underlying data. To load more sessions into the CrowdMap, scroll to the end of the sessions list and click “more sessions”.
The heat legend is located at the bottom of the AirCasting maps page. It displays the correspondence between colors and measurement values.
To change the relationship between colors and measurements, adjust the sliders on the heat legend located at the bottom edge of the screen or update the values in the boxes that define the lower and upper range. To fit the scale to the session data measurements, click the connected up/down arrows at the bottom right hand corner of the screen. To switch to a monochrome blue color scheme, click the blue dots at the far end of the heat legend.
You own your AirCasting data. Share it, CrowdSource it, export it, delete it, API it! It's all yours and your contributions have made AirCasting one of the largest open-source databases of community-collected air quality measurements ever created.
On the AirCasting website, to share a link to a specific map view and sessions list, click the blue and white link button at the bottom of the search filters. To share a link to a single session, click the blue and white link button inside the single session view window that displays the session graph. To share a link to a session from inside the AirCasting app, navigate to the sessions screen > tap a session > tap “Share” > tap “Share link”.
On the AirCasting website maps page, search for the session or sessions you’d like to download using the search filters. After you’ve narrowed the number of sessions on the sessions list, click the blue and white button located at the bottom of the search filters reading “export sessions”, enter your email address, and click “export”. Note that this will export all the sessions loaded to the sessions list; the greater the number of sessions and the more data points each session contains, the longer it will take to receive the email. To export data for a single session using the AirCasting website, select a session, then click the blue and white button reading “export session” located inside the single session view. To export data for a single session via the AirCasting app, navigate to the sessions screen > tap a session > tap “Share” > tap “Share file”. Note that the email with your session data is likely to end up in your email spam folder. To avoid this, add “noreply@aircasting.org” to your list of email contacts. For privacy reasons, we do not keep a record of email addresses entered.
(o) Did you check your spam folder? The email with your session data is likely to end up in your email spam folder. To avoid this, add “noreply@aircasting.org” to your list of email contacts.
(o) Is your Android device connected to the Internet via the WiFi or cellular network? Make sure it is and then navigate to the sessions screen and pull down to sync your sessions from the AirCasting app to the AirCasting website so your session files can be shared.
The AirCasting API documentation is on GitHub.
The AirCasting app has several features that enable location data to remain private. AirCasters can “disable maps” in the app settings, which turns off GPS tracking. When AirCasters record data with the GPS disabled, the data never leaves the Android device and is never synced to our servers. AirCasters can elect to save their data to the AirCasting server but not contribute it to the “CrowdMap”. This means the data can only be viewed on the website via a link that you generate inside the app when signed in. AirCasters can also elect to send the data from the app directly to their own server, entirely bypassing the AirCasting server, see “Backend settings” under “Settings”. In addition, when recording fixed indoor sessions, GPS coordinates are never logged.
Both the AirCasting app and the HabitatMap/AirCasting website are compliant with the EU General Data Protection Regulation. Specifically, we recognize that users have the following rights: a right to portability of your personal data; a right to obtain restriction of your personal data’s processing; a right to obtain erasure of your personal data; and a right not to be subject to an automated individual decision. HabitatMap will never collect any personally identifiable information about you through the AirCasting app or website unless you have provided it to us voluntarily, nor will we use any information gleaned from your Android device to market to you or pass your information to any third party. Our complete privacy policy is available here.
HabitatMap is a not-for-profit organization supported by contributions from individual donors, government & foundation grants, and AirBeam sales. Past funders include Lush Cosmetics Charity Pot, Knight Foundation through a partnership between HabitatMap and Sonoma Technology; the New York State Dept. of Environmental Conservation through a partnership between HabitatMap and Newtown Creek Alliance and HabitatMap and UPROSE; the US EPA through a partnership between HabitatMap and Sustainable South Bronx; the Hive Digital Media Learning Fund of the New York Community Trust through a partnership between HabitatMap and New York Hall of Science; the Mozilla Hive NYC Learning Network through a partnership between HabitatMap, Parsons the New School for Design, and New York Hall of Science; NIEHS, EPA, and HHS through a partnership between HabitatMap and researchers and engineers from New York University and Carnegie Mellon’s CREATE lab; New York State Pollution Prevention Institute through a partnership between HabitatMap and New York Hall of Science; the Grey Area Arts Foundation through a partnership between HabitatMap, Sonoma Technology, and AethLabs; and Google Earth Outreach.
There are dozens of people who contributed time and effort to make the AirBeam and AirCasting a reality. In particular, we’d like to thank Lunar Logic for coding the AirCasting website and app, Raymond Yap - adjunct professor of Computer Engineering at City Tech - for prototyping AirCasting hardware and firmware, Consequence of Innovation for designing the HabitatMap website, and Jaycon Systems for manufacturing the AirBeam and fulfilling AirBeam orders.
Due to financial constraints, we have yet to develop a version of the AirCasting app for iOS, however, we would very much like to. If you’d like to help us bring an iOS app to fruition, please consider making a donation. So that we know your donation is earmarked for AirCasting iOS app dvelopment, please write “iOS development” in the notes when making your donation. When we reach $50k in iOS development donations we will begin coding the app.
The AirCasting app and website code is on GitHub as is the AirBeam2 Firmware and the electronic schematics for the AirBeam2. The STL files for 3D printing the AirBeam2 enclosure can be downloaded from Shapeways.