Script No longer Writting to Sheets

[G]

I'm very new to Scripts and am having problems and was hoping for some suggestions to resolve. I was using the following script to upload data every 30 min and populate a spreadsheet. The first column is the current date/time followed by various data in the next 5 columns. It starts a new row with a new data group. It ran for about a day with no issues and then stopped writing data. The hardware is still sending data and the script execution log indicates it is executing.  I tried redeploying and also deploying with new ID with no results. Any idea why it would stop writing data or how troubleshoot the problem? Thanks.

Function doGet(e) { 

  Logger.log( JSON.stringify(e) );

  var result = 'Ok';

  if (e.parameter == 'undefined') {

    result = 'No Parameters';

  }

  else {

    var sheet_id = '1adwHUpM2s5MUCR6U_u5GW34dr59Su-RhQxxxxxx';  // Spreadsheet ID

    var sheet = SpreadsheetApp.openById(sheet_id).getActiveSheet();

    var newRow = sheet.getLastRow() + 1;            

    var rowData = [ ];

    rowData[0] = new Date();  

    for (var param in e.parameter) {

      Logger.log('In for loop, param=' + param);

      var value = stripQuotes(e.parameter[param]);

      Logger.log(param + ':' + e.parameter[param]);

      switch (param) {

        case 'value1': //Water Pressure (PSI)

          rowData[1] = value; //Value in column B

          result = 'Written on column B';

          break;

        case 'value2': //Water Temp (F)

          rowData[2] = value; //Value in column C

          result += ' Written on column C';

          break;

        case 'value3' : //Air Pressure (PSI)

          rowData[3] =value; //Value in column D

          result  += 'Written on Column D';

          break;

        case 'value4' : //Air Temp (F)

          rowData[4] = value;  //Value in column E

          result  +=  'Written on Column E';

          break;

        case 'value5' : //Battery vcc (volts)

          rowData[5] = value; //Value in column F

          result  += 'Written on Column F';

          break;

        default:

          result = "unsupported parameter";

      }

    }

    Logger.log(JSON.stringify(rowData));

    var newRange = sheet.getRange(newRow, 1, 1,rowData.length);

    newRange.setValues([rowData]);

  }

  return ContentService.createTextOutput(result);

}

function stripQuotes( value ) {

  return value.replace(/^["']|['"]$/g, "");

}