flowerpower — access Parrot's Flower Power Sensor from R

An R package to access data from Parrot's awesome Flower Power sensor. This is still in alpha.

FlowerPower's API is a bit strange and requires a lot of authentication keys, including your username and password to the FlowerPower site (not the dev portal). Here is an example:

> fp <- flowerpower(user, pass, id, secret)
> get_locations(fp) # get location IDs
> s <- get_samples(fp, location='1W2zIGfgEF14220_YOURLOCATIONKEY')
> head(s)
       capture_ts par_umole_m2s air_temperature_celsius vwc_percent
1 2015-03-10 21:49:00     12.607764                30.45476    17.04505
2 2015-03-10 22:04:00     11.928668                29.37226    16.63505
3 2015-03-10 22:19:00      8.715568                28.45192    16.44611
4 2015-03-10 22:34:00     11.429752                28.15554    15.81059
5 2015-03-10 22:49:00      7.567640                28.86598    16.66856
6 2015-03-10 23:04:00      7.066480                28.31073    16.91436

> p <- ggplot(s) + geom_line(aes(x=capture_ts, y=air_temperature_celsius))
> p <- p + xlab("time") + ylab("temperature (C)")
> p

There's also a get_fertilizer() function to access these data.

Design

An R6 class stores state and lower-level methods for getting data from the server, and higher-level S3 methods call these methods and reshape results. Users interact with these higher-level functions, but I leave the object methods public for developers that want to do their own hacking.

Todo

• Refresh auth token.