fix: date time format change on SGL website

Fix #2

DESCRIPTION

 Package: SGLdataGrabber
 Title: Grab available data from EPTB Seine Grands Lacs web site
-Version: 0.1.1
+Version: 0.1.2
 Authors@R: 
     person(given = "David",
            family = "Dorchies",

R/sgl.R

@@ -43,7 +43,7 @@ SGL_GrabVariableListAll <- function(
 #'
 #' @param URL Complete URL of the data source.
 #'
-#' @return A dataframe containing stata time series with 2 columns: `datetime` (Unix timestamp format) and `value`.
+#' @return A dataframe containing stata time series with 2 columns: `datetime` ([character] format "YYYY-MM-DDThh:mm") and [numeric] `value`.
 #' @export
 #'
 #' @import httr

R/thingsboard.R

@@ -16,7 +16,7 @@
 #' )
 #' }
 thingsboard_UploadTelemetry <- function(URL, dfData) {
-  dfData$datetime <- paste0(format(dfData$datetime), "000")
+  dfData$datetime <- paste0(format(as.numeric(as.POSIXct(dfData$datetime))), "000")
   lData <- split(dfData, dfData$datetime)
   lapply(X = lData, FUN = thingsboard_UploadTimeStep, URL)
 }