diff --git a/DESCRIPTION b/DESCRIPTION
index 6b7d8f0..c1485b6 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -8,6 +8,7 @@ Imports:
     dplyr,
     httr,
     digest,
+    lazyeval,
     readr,
     purrr,
     magrittr
diff --git a/R/00utils.R b/R/00utils.R
index 1ce9673..a59c136 100644
--- a/R/00utils.R
+++ b/R/00utils.R
@@ -27,6 +27,7 @@ is_non_interactive = function () {
 
 #' custom recursive lapply with better handling of NULL values
 #' from https://stackoverflow.com/a/38950304
+#' @noRd
 recursive_lapply = function(x, fn) {
   if (is.list(x))
     lapply(x, recursive_lapply, fn)
diff --git a/R/archive.R b/R/archive.R
index 71a55b8..a9a0898 100644
--- a/R/archive.R
+++ b/R/archive.R
@@ -23,11 +23,12 @@ osem_archive_endpoint = function () {
 #'
 #' @param x A `sensebox data.frame` of a single box, as retrieved via \code{\link{osem_box}},
 #'   to download measurements for.
-#' @param fromDate Start date for measurement download.
+#' @param ... see parameters below
+#' @param fromDate Start date for measurement download, must be convertable via `as.Date`.
 #' @param toDate End date for measurement download (inclusive).
 #' @param sensorFilter A NSE formula matching to \code{x$sensors}, selecting a subset of sensors.
 #' @param progress Whether to print download progress information, defaults to \code{TRUE}.
-#' @return A \code{tbl_df} Containing observations of all selected sensors for each time stamp.
+#' @return A \code{tbl_df} containing observations of all selected sensors for each time stamp.
 #'
 #' @seealso \href{https://archive.opensensemap.org}{openSenseMap archive}
 #' @seealso \code{\link{osem_measurements}}
@@ -44,20 +45,26 @@ osem_measurements_archive.default = function (x, ...) {
   stop(paste('not implemented for class', toString(class(x))))
 }
 
-#' @describeIn osem_measurements_archive Get daywise measurements for one or
-#' more sensors of a single box
+
+# ==============================================================================
+#
+#' @describeIn osem_measurements_archive Get daywise measurements for one or more sensors of a single box.
 #' @export
 #' @examples
-#' # fetch measurements for a single day
-#' box = osem_box('593bcd656ccf3b0011791f5a')
-#' m = osem_measurements_archive(box, as.POSIXlt('2018-09-13'))
-#'
 #' \donttest{
+#'   # fetch measurements for a single day
+#'   box = osem_box('593bcd656ccf3b0011791f5a')
+#'   m = osem_measurements_archive(box, as.POSIXlt('2018-09-13'))
+#'
 #'   # fetch measurements for a date range and selected sensors
 #'   sensors = ~ phenomenon %in% c('Temperatur', 'Beleuchtungsstärke')
-#'   m = osem_measurements_archive(box, as.POSIXlt('2018-09-01'), as.POSIXlt('2018-09-30'), sensorFilter = sensors)
+#'   m = osem_measurements_archive(
+#'     box,
+#'     as.POSIXlt('2018-09-01'), as.POSIXlt('2018-09-30'),
+#'     sensorFilter = sensors
+#'   )
 #' }
-osem_measurements_archive.sensebox = function (x, fromDate, toDate = fromDate, sensorFilter = ~ T, progress = T) {
+osem_measurements_archive.sensebox = function (x, fromDate, toDate = fromDate, sensorFilter = ~ T, ..., progress = T) {
   if (nrow(x) != 1)
     stop('this function only works for exactly one senseBox!')
 
@@ -78,7 +85,14 @@ osem_measurements_archive.sensebox = function (x, fromDate, toDate = fromDate, s
 }
 
 #' fetch measurements from archive from a single box, and a single sensor
-archive_fetch_measurements = function (box, sensor, fromDate, toDate, progress) {
+#'
+#' @param box A sensebox data.frame with a single box
+#' @param sensorId Character specifying the sensor
+#' @param fromDate Start date for measurement download, must be convertable via `as.Date`.
+#' @param toDate End date for measurement download (inclusive).
+#' @param progress whether to print progress
+#' @return A \code{tbl_df} containing observations of all selected sensors for each time stamp.
+archive_fetch_measurements = function (box, sensorId, fromDate, toDate, progress) {
   dates = list()
   from = fromDate
   while (from <= toDate) {
@@ -90,14 +104,14 @@ archive_fetch_measurements = function (box, sensor, fromDate, toDate, progress)
   progress = if (progress && !is_non_interactive()) httr::progress() else NULL
 
   measurements = lapply(dates, function(date) {
-    url =  build_archive_url(date, box, sensor)
+    url =  build_archive_url(date, box, sensorId)
     res = httr::GET(url, progress, handle = http_handle)
 
     if (httr::http_error(res)) {
       warning(paste(
         httr::status_code(res),
         'on day', format.Date(date, '%F'),
-        'for sensor', sensor
+        'for sensor', sensorId
       ))
 
       if (httr::status_code(res) == 404)
@@ -113,8 +127,8 @@ archive_fetch_measurements = function (box, sensor, fromDate, toDate, progress)
 
 #' returns URL to fetch measurements from a sensor for a specific date,
 #' based on `osem_archive_endpoint()`
-build_archive_url = function (date, box, sensor) {
-  sensorId = sensor
+#' @noRd
+build_archive_url = function (date, box, sensorId) {
   d =  format.Date(date, '%F')
   format = 'csv'
 
@@ -129,6 +143,9 @@ build_archive_url = function (date, box, sensor) {
 
 #' replace chars in box name according to archive script:
 #' https://github.com/sensebox/osem-archiver/blob/612e14b/helpers.sh#L66
+#'
+#' @param box A sensebox data.frame
+#' @return character with archive identifier for each box
 osem_box_to_archivename = function (box) {
   name = gsub('[^A-Za-z0-9._-]', '_', box$name)
   paste(box$X_id, name, sep = '-')
diff --git a/R/box.R b/R/box.R
index 7a5031f..290f6ef 100644
--- a/R/box.R
+++ b/R/box.R
@@ -165,7 +165,7 @@ parse_senseboxdata = function (boxdata) {
 
   # extract metadata from sensors
   thebox$phenomena = sensors %>%
-    setNames(lapply(., function (s) s$`_id`)) %>%
+    stats::setNames(lapply(., function (s) s$`_id`)) %>%
     lapply(function(s) s$title) %>%
     unlist %>% list # convert to vector
 
diff --git a/R/opensensmapr.R b/R/opensensmapr.R
index 6e6b8a5..4a7bd9b 100644
--- a/R/opensensmapr.R
+++ b/R/opensensmapr.R
@@ -100,4 +100,13 @@
 `%>%` = magrittr::`%>%`
 
 # just to make R CMD check happy, due to NSE (dplyr) functions
-globalVariables(c('lastMeasurement', '.'))
+globalVariables(c(
+  'createdAt',
+  'lastMeasurement',
+  'sensorType',
+  'title',
+  'unit',
+  'value',
+  'X_id',
+  '.'
+))
diff --git a/man/archive_fetch_measurements.Rd b/man/archive_fetch_measurements.Rd
index 6754ef4..7e95879 100644
--- a/man/archive_fetch_measurements.Rd
+++ b/man/archive_fetch_measurements.Rd
@@ -4,7 +4,21 @@
 \alias{archive_fetch_measurements}
 \title{fetch measurements from archive from a single box, and a single sensor}
 \usage{
-archive_fetch_measurements(box, sensor, fromDate, toDate, progress)
+archive_fetch_measurements(box, sensorId, fromDate, toDate, progress)
+}
+\arguments{
+\item{box}{A sensebox data.frame with a single box}
+
+\item{sensorId}{Character specifying the sensor}
+
+\item{fromDate}{Start date for measurement download, must be convertable via `as.Date`.}
+
+\item{toDate}{End date for measurement download (inclusive).}
+
+\item{progress}{whether to print progress}
+}
+\value{
+A \code{tbl_df} containing observations of all selected sensors for each time stamp.
 }
 \description{
 fetch measurements from archive from a single box, and a single sensor
diff --git a/man/build_archive_url.Rd b/man/build_archive_url.Rd
deleted file mode 100644
index 3508ba6..0000000
--- a/man/build_archive_url.Rd
+++ /dev/null
@@ -1,13 +0,0 @@
-% Generated by roxygen2: do not edit by hand
-% Please edit documentation in R/archive.R
-\name{build_archive_url}
-\alias{build_archive_url}
-\title{returns URL to fetch measurements from a sensor for a specific date,
-based on `osem_archive_endpoint()`}
-\usage{
-build_archive_url(date, box, sensor)
-}
-\description{
-returns URL to fetch measurements from a sensor for a specific date,
-based on `osem_archive_endpoint()`
-}
diff --git a/man/osem_box_to_archivename.Rd b/man/osem_box_to_archivename.Rd
index 8d2707d..5bebcd9 100644
--- a/man/osem_box_to_archivename.Rd
+++ b/man/osem_box_to_archivename.Rd
@@ -7,6 +7,12 @@ https://github.com/sensebox/osem-archiver/blob/612e14b/helpers.sh#L66}
 \usage{
 osem_box_to_archivename(box)
 }
+\arguments{
+\item{box}{A sensebox data.frame}
+}
+\value{
+character with archive identifier for each box
+}
 \description{
 replace chars in box name according to archive script:
 https://github.com/sensebox/osem-archiver/blob/612e14b/helpers.sh#L66
diff --git a/man/osem_measurements_archive.Rd b/man/osem_measurements_archive.Rd
index a9fdcac..1b21d5b 100644
--- a/man/osem_measurements_archive.Rd
+++ b/man/osem_measurements_archive.Rd
@@ -8,13 +8,15 @@
 osem_measurements_archive(x, ...)
 
 \method{osem_measurements_archive}{sensebox}(x, fromDate,
-  toDate = fromDate, sensorFilter = ~T, progress = T)
+  toDate = fromDate, sensorFilter = ~T, ..., progress = T)
 }
 \arguments{
 \item{x}{A `sensebox data.frame` of a single box, as retrieved via \code{\link{osem_box}},
 to download measurements for.}
 
-\item{fromDate}{Start date for measurement download.}
+\item{...}{see parameters below}
+
+\item{fromDate}{Start date for measurement download, must be convertable via `as.Date`.}
 
 \item{toDate}{End date for measurement download (inclusive).}
 
@@ -23,7 +25,7 @@ to download measurements for.}
 \item{progress}{Whether to print download progress information, defaults to \code{TRUE}.}
 }
 \value{
-A \code{tbl_df} Containing observations of all selected sensors for each time stamp.
+A \code{tbl_df} containing observations of all selected sensors for each time stamp.
 }
 \description{
 This function is significantly faster than \code{\link{osem_measurements}} for large
@@ -40,19 +42,22 @@ but continue the remaining download.
 }
 \section{Methods (by class)}{
 \itemize{
-\item \code{sensebox}: Get daywise measurements for one or
-more sensors of a single box
+\item \code{sensebox}: Get daywise measurements for one or more sensors of a single box.
 }}
 
 \examples{
 # fetch measurements for a single day
 box = osem_box('593bcd656ccf3b0011791f5a')
 m = osem_measurements_archive(box, as.POSIXlt('2018-09-13'))
-  
+
 \donttest{
   # fetch measurements for a date range and selected sensors
   sensors = ~ phenomenon \%in\% c('Temperatur', 'Beleuchtungsstärke')
-  m = osem_measurements_archive(box, as.POSIXlt('2018-09-01'), as.POSIXlt('2018-09-30'), sensorFilter = sensors)
+  m = osem_measurements_archive(
+    box,
+    as.POSIXlt('2018-09-01'), as.POSIXlt('2018-09-30'),
+    sensorFilter = sensors
+  )
 }
 }
 \seealso{