Defining variable type for google sheets script

I'm building an arduino project to measure environmental conditions in a salami conditioning cabinet. I've "stolen" some code from another project.

https://iotdesignpro.com/articles/esp32-data-logging-to-google-sheets-with-google-scripts#:~:text=Arduino%20Code%20for%20Sending%20Data,it%20into%20the%20Google%20Sheets.

However all values that need to be written to the sample google sheet are numbers. How do I change these values to other data types.eg:
date
string
boolean values.

This is my code which is working and which puts numeric values in 9 columns in my Google spreadsheet.

var sheet_id = "1wZmS30CXD7IJXatestingzmvX9DccLeV4";  var sheet_name = "cazzzet";  function doGet(e){  var ss = SpreadsheetApp.openById(sheet_id);  var sheet = ss.getSheetByName(sheet_name);  var sensor = Number(e.parameter.sensor);  var date = Number(e.parameter.date);  var temp1 = Number(e.parameter.temp1);  var temp2 = Number(e.parameter.temp2);  var temp3 = Number(e.parameter.temp3);  var tempaverage = Number(e.parameter.tempaverage);  var hg1 = Number(e.parameter.hg1);  var hg2 = Number(e.parameter.hg2);  var hg3 = Number(e.parameter.hg3);  var hgaverage = Number(e.parameter.hgaverage);  sheet.appendRow([sensor,date,temp1,temp2,temp3,tempaverage,hg1,hg2,hg3,hgaverage]);