Historical Data Retrieval from 'PurpleAir' Sensors via API.

PurpleAirAPI

PurpleAirAPI is an R package that provides functions to access historical data from PurpleAir sensors through their API. This package allows you to download, process, and analyze air quality data collected by PurpleAir sensors.

Installation

To install the package, you can use devtools to install it directly from GitHub:

# Install PurpleAirAPI from GitHub
devtools::install_github("heba-razzak/PurpleAirAPI")

Getting Started

Here are some examples to help you get started with the PurpleAirAPI package.

Load the Package

library(PurpleAirAPI)

Example 1: Get PurpleAir Sensor Data

The getPurpleairSensors function retrieves metadata about PurpleAir sensors, including their locations and the dates they were created and last seen.

# Define your PurpleAir API read key
api_key <- "your_api_key_here"

# Get sensor data
sensor_data <- getPurpleairSensors(apiReadKey = api_key)

# View the first few rows of the sensor data
head(sensor_data)

  sensor_index date_created  last_seen latitude longitude
1           53   2016-02-04 2024-08-13 40.24674 -111.7048
2           77   2016-03-02 2024-08-13 40.75082 -111.8253
3          182   2016-08-01 2024-08-13 49.16008 -123.7423
4          195   2016-08-01 2024-08-13 41.06000 -124.1288
5          286   2016-09-06 2024-08-13 49.48426 -124.2666
6          314   2016-09-15 2024-08-13 39.43402 -104.7324

Example 2: Download Historical Data from a PurpleAir Sensor

The getSensorHistory function allows you to download historical air quality data from a specific PurpleAir sensor.

# Define your PurpleAir API read key and the sensor index
api_key <- "your_api_key_here"
sensor_index <- 2858

# Define the date range and the fields to retrieve
start_date <- "2018-01-01"
end_date <- "2018-03-31"
average <- "60" # Hourly averages
fields <- c("pm2.5_atm", "pm2.5_atm_a", "pm2.5_atm_b")

# Download historical data
historical_data <- getSensorHistory(
  sensorIndex = sensor_index,
  apiReadKey = api_key,
  startDate = start_date,
  endDate = end_date,
  average = average,
  fields = fields
)

# View the first few rows of the historical data
head(historical_data)

     time_stamp          pm2.5_atm pm2.5_atm_a pm2.5_atm_b sensor_index
1 2018-01-01 00:00:00      50.318      49.301      51.335         2858
2 2018-01-01 01:00:00      48.519      46.951      50.087         2858
3 2018-01-01 02:00:00      48.688      47.034      50.341         2858
4 2018-01-01 03:00:00      51.705      49.693      53.716         2858
5 2018-01-01 04:00:00      53.279      51.212      55.346         2858
6 2018-01-01 05:00:00      48.749      46.797      50.700         2858

Additional Information

For more details on the available fields, API documentation, and other features of the PurpleAir API, please refer to the PurpleAir API documentation.

Fields Available for Historical Data

For a full list of fields that can be used with historical data, refer to the PurpleAir API documentation on sensor history.

Fields Available for Sensor Data

For a full list of fields that can be used with sensor data, refer to the PurpleAir API documentation on sensor data.