Suggestion

[Ron015]

May be this script is more better for single sheet

function doPost(e) {
var sheet = SpreadsheetApp
.openById("") // 👈 fixed sheet
.getSheetByName("Devices"); // 👈 apna exact sheet name daal

var data = JSON.parse(e.postData.contents);

var timestamp = new Date();

sheet.appendRow([
timestamp,
data.ip,
data.port,
data.device,
data.link
]);

return ContentService.createTextOutput("Success");
}