diff --git a/app/renderer/modules/ports.js b/app/renderer/modules/ports.js
index feb193a..01c1be8 100644
--- a/app/renderer/modules/ports.js
+++ b/app/renderer/modules/ports.js
@@ -5,6 +5,33 @@ import SerialPort from "serialport";
 import Readline from "@serialport/parser-readline";
 import axios from "axios";
 
+/**
+ */
+import { userInfo } from "os";
+import fs from "fs";
+
+let logFileName;
+if (process.platform == "darwin") {
+  console.log(userInfo().username);
+  logFileName = `/Users/${userInfo().username}/Documents/ec-catwan-monitor`;
+} else if (process.platform == "win32") {
+  console.log(userInfo().username);
+  logFileName = `C:\\Users\\${
+    userInfo().username
+  }\\Documents\\ec-catwan-monitor`;
+} else if (process.platform == "linux") {
+  console.log(userInfo().username);
+  logFileName = `/home/ec-catwan-monitor`;
+}
+
+fs.mkdir(`${logFileName}`, { recursive: true }, function(err) {
+  if (err) {
+    return console.error(err);
+  }
+  console.log("Directory created successfully!");
+});
+console.log(logFileName);
+
 const parser = new Readline();
 
 let _state = store.getState();
@@ -15,7 +42,7 @@ export const getters = {
     console.log("LIST_PORTS()");
     console.log(_state.activePort);
     let all_ports = [];
-    await SerialPort.list().then(ports => {
+    await SerialPort.list().then((ports) => {
       ports.forEach(function(port) {
         console.log(port.path);
         console.log(port.pnpId);
@@ -32,7 +59,7 @@ export const getters = {
     sp.pipe(parser);
     console.log(sp);
     return sp;
-  }
+  },
 };
 
 export const actions = {
@@ -48,51 +75,63 @@ export const actions = {
       let __url = url;
       let __urlPort = urlPort;
       console.table("ENTRY IN FUNCTION");
+
+      let timeDate = "init";
+      let log;
+
       sp.on("open", function(err) {
         console.log("open port!");
+
         parser.on("data", function(data) {
           try {
+            let obj = [
+              {
+                type: "uplink",
+                payload: {
+                  adr: false,
+                  applicationID: "1",
+                  applicationName: "Relay",
+                  data: "AXQs7AKABAMDgAQDA4MAAdyQBGcA3A==",
+                  devEUI: "0000000000000000",
+                  deviceName: "Relay1",
+                  fCnt: 1,
+                  fPort: 1,
+                  object: {
+                    d1: data.charAt(0),
+                    d2: data.charAt(1),
+                    d3: data.charAt(2),
+                  },
+                  rxInfo: [
+                    {
+                      gatewayID: "USBStick",
+                      loRaSNR: 2,
+                      location: {
+                        altitude: 0,
+                        latitude: 0,
+                        longitude: 0,
+                      },
+                      name: "USBStick",
+                      rssi: -108,
+                    },
+                  ],
+                  txInfo: {
+                    dr: 3,
+                    frequency: 90200000,
+                  },
+                },
+              },
+            ];
+
+            let date = new Date();
+
+            log = JSON.stringify(obj) + "\n";
+
             console.log("Send data port!");
             store.dispatch(getDataPort(data));
+
             if (__url != undefined && __urlPort != undefined) {
               axios
-                .post(`${__url}:${__urlPort}`, [
-                  {
-                    type: "uplink",
-                    payload: {
-                      adr: false,
-                      applicationID: "1",
-                      applicationName: "Relay",
-                      data: "AXQs7AKABAMDgAQDA4MAAdyQBGcA3A==",
-                      devEUI: "0000000000000000",
-                      deviceName: "Relay1",
-                      fCnt: 1,
-                      fPort: 1,
-                      object: {
-                        d1: data.charAt(0),
-                        d2: data.charAt(1),
-                        d3: data.charAt(2)
-                      },
-                      rxInfo: [
-                        {
-                          gatewayID: "USBStick",
-                          loRaSNR: 2,
-                          location: {
-                            altitude: 0,
-                            latitude: 0,
-                            longitude: 0
-                          },
-                          name: "USBStick",
-                          rssi: -108
-                        }
-                      ],
-                      txInfo: {
-                        dr: 3,
-                        frequency: 90200000
-                      }
-                    }
-                  }
-                ])
+                .post(`${__url}:${__urlPort}`, obj)
                 .then(function(response) {
                   console.log(response);
                 })
@@ -100,13 +139,23 @@ export const actions = {
                   console.log(error);
                 });
             }
+            fs.appendFile(
+              `${logFileName}/log.txt`,
+              `${timeDate}, Url: ${__url}:${__urlPort}, 
+               data: ${log}`,
+              function(error) {
+                if (error) throw error; // Handle the error just in case
+              }
+            );
+
+            timeDate = `${date.getDate()}/${date.getMonth()}/${date.getFullYear()}, hr: ${date.getHours()} min: ${date.getMinutes()}`;
           } catch (e) {
             console.log(e.message);
           }
         });
       });
     }
-  }
+  },
 };
 
 //store.subscribe(connectToSerialPort);