AWARE: Barometer

This sensor module allows us to manage air-pressure data provided by iOS CMAltimeter.

Requirements

iOS 13 or later

Installation

You can integrate this framework into your project via Swift Package Manager (SwiftPM) or CocoaPods.

SwiftPM

1. Open Package Manager Windows

   • Open Xcode -> Select Menu Bar -> File -> App Package Dependencies...

2. Find the package using the manager

   • Select Search Package URL and type git@github.com:awareframework/com.awareframework.ios.sensor.barometer.git

3. Import the package into your target.

CocoaPods

com.awareframework.ios.sensor.barometer is available through CocoaPods.

1. To install it, simply add the following line to your Podfile:

pod 'com.awareframework.ios.sensor.barometer'

2. Import com.awareframework.ios.sensor.barometer library into your source code.

import com_awareframework_ios_sensor_barometer

Public functions

BarometerSensor

• init(config:BarometerSensor.Config) : Initializes the baromter sensor with the optional configuration.
• start(): Starts the barometer sensor with the optional configuration.
• stop(): Stops the service.

BarometerSensor.Config

Class to hold the configuration of the sensor.

Fields

• sensorObserver: BarometerObserver: Callback for live data updates.
• frequency: Int: Data samples to collect per second (Hz). (default = 5)
• period: Double: Period to save data in minutes. (default = 1)
• threshold: Double: If set, do not record consecutive points if change in value is less than the set value.
• enabled: Boolean Sensor is enabled or not. (default = false)
• debug: Boolean enable/disable logging to Logcat. (default = false)
• label: String Label for the data. (default = "")
• deviceId: String Id of the device that will be associated with the events and the sensor. (default = "")
• dbEncryptionKey Encryption key for the database. (default = null)
• dbType: Engine Which db engine to use for saving data. (default = Engine.DatabaseType.NONE)
• dbPath: String Path of the database. (default = "aware_barometer")
• dbHost: String Host for syncing the database. (default = null)

Data Representations

Barometer Sensor

Contains the raw sensor data.

Field	Type	Description
pressure	Double	The recorded pressure, in kilopascals (kPs).
label	String	Customizable label. Useful for data calibration or traceability
deviceId	String	AWARE device UUID
label	String	Customizable label. Useful for data calibration or traceability
timestamp	Int64	Unixtime milliseconds since 1970
timezone	Int	Timezone of the device
os	String	Operating system of the device (ex. android)

Example usage

var barometerSensor = BarometerSensor.init(BarometerSensor.Config().apply{config in
    config.sensorObserver = Observer()
    config.debug = true
    config.dbType = .REALM
})
barometerSensor?.start()
barometerSensor?.stop()

class Observer:BarometerObserver{
    func onDataChanged(data: BarometerData) {
        // Your code here..
    }
}

Author

Yuuki Nishiyama (The University of Tokyo), nishiyama@csis.u-tokyo.ac.jp

Related Links

Apple | CMAltimeter Apple | CMAltitudeData Apple | Core Motion

License

Copyright (c) 2018 AWARE Mobile Context Instrumentation Middleware/Framework (http://www.awareframework.com)

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.