diff --git a/package.json b/package.json
index 93ab00c..33a1dfc 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hardwario-playground",
-  "productName": "Hardwario Playground",
+  "productName": "HARDWARIO Playground",
   "author": {
     "name": "HARDWARIO s.r.o.",
     "email": "karel.blavka@hardwario.com",
@@ -28,9 +28,9 @@
     "package-mac": "npm run webpack && electron-builder build --mac"
   },
   "build": {
-    "productName": "Hardwario Playground",
+    "productName": "HARDWARIO Playground",
     "appId": "com.electron.hio-playground",
-    "artifactName": "hio-playground-${version}-${os}-${arch}.${ext}",
+    "artifactName": "hio-playground-v${version}-${os}-${arch}.${ext}",
     "files": [
       "dist/",
       "node_modules/",
@@ -48,11 +48,11 @@
     "electronVersion": "7.1.9",
     "publish": null,
     "mac": {
-      "artifactName": "hio-playground-${version}-macos-${arch}.${ext}",
+      "artifactName": "hio-playground-v${version}-macos-${arch}.${ext}",
       "category": "public.app-category.utilities"
     },
     "win": {
-      "artifactName": "hio-playground-${version}-windows-${arch}.${ext}",
+      "artifactName": "hio-playground-v${version}-windows-${arch}.${ext}",
       "target": [
         "nsis",
         "portable"
@@ -60,7 +60,7 @@
       "publisherName": "HARDWARIO s.r.o."
     },
     "linux": {
-      "artifactName": "hio-playground-${version}-linux-${arch}.${ext}",
+      "artifactName": "hio-playground-v${version}-linux-${arch}.${ext}",
       "target": [
         "deb",
         "snap",
@@ -69,7 +69,7 @@
       "category": "Utility"
     },
     "nsis": {
-      "artifactName": "hio-playground-${version}-${os}-setup-${arch}.${ext}"
+      "artifactName": "hio-playground-v${version}-${os}-setup-${arch}.${ext}"
     },
     "dmg": {
       "contents": [
diff --git a/src/render/components/Firmware.js b/src/render/components/Firmware.js
index 91c1955..f3cbff0 100644
--- a/src/render/components/Firmware.js
+++ b/src/render/components/Firmware.js
@@ -123,7 +123,7 @@ export default class extends Component {
         this.setState({ports:ports});
 
         if ((this.state.port === "") && (ports.length > 0)) {
-            this.setState({port:ports[0].comName});
+            this.setState({port:ports[0].path});
         }
 
         this.timer = setTimeout(() => {
@@ -243,7 +243,7 @@ export default class extends Component {
         <select className="form-control mb-2" id="formDeviceSelect" disabled={this.state.isRun} value={this.state.port} onChange={(e) => this.setState({ port: e.target.value })}>
             {this.state.ports.length == 0 ? <option>(no device available)</option> : null }
             {
-                this.state.ports.map((port, index) => <option value={port.comName} key={index}>{port.comName}{port.serialNumber ? " " + port.serialNumber : null}</option>)
+                this.state.ports.map((port, index) => <option value={port.path} key={index}>{port.path}{port.serialNumber ? " " + port.serialNumber : null}</option>)
             }
         </select>
 
diff --git a/src/render/components/Gateway.js b/src/render/components/Gateway.js
index 6769e1f..5e52ff1 100644
--- a/src/render/components/Gateway.js
+++ b/src/render/components/Gateway.js
@@ -55,7 +55,7 @@ export default class extends Component {
 
         if (this.state.ports.length == ports.length){
             for (let i=0, l=ports.length; i < l; i++) {
-                if (this.state.ports[i].comName != ports[i].comName) {
+                if (this.state.ports[i].path != ports[i].path) {
                     change = true;
                     break;
                 }
@@ -67,7 +67,8 @@ export default class extends Component {
         if (change)
         {
             if ((this.state.selectedPort == "") && (ports.length > 0)) {
-                this.setState({ selectedPort: ports[0].comName });
+                this.setState({ selectedPort: ports[0].path });
+                console.log(this.state.selectedPort);
             }
             else if (ports.length == 0)
             {
@@ -103,6 +104,8 @@ export default class extends Component {
 
         if (this.state.selectedPort == "") return;
 
+        console.log(this.state.selectedPort);
+
         ipcRenderer.send("gateway/connect", this.state.selectedPort)
     }
 
@@ -116,7 +119,7 @@ export default class extends Component {
                         <select className="form-control" value={this.state.selectedPort} onChange={(e) => this.setState({ selectedPort: e.target.value })}>
                             {this.state.ports.length == 0 ? <option>(no device available)</option> : null }
                             {
-                                this.state.ports.map((port, index) => <option value={port.comName} key={index}>{port.comName}{port.serialNumber ? " " + port.serialNumber : null}</option>)
+                                this.state.ports.map((port, index) => <option value={port.path} key={index}>{port.path}{port.serialNumber ? " " + port.serialNumber : null}</option>)
                             }
                         </select>
                     </FormGroup>
diff --git a/src/render/components/GatewayList.js b/src/render/components/GatewayList.js
index 2930b63..39b1917 100644
--- a/src/render/components/GatewayList.js
+++ b/src/render/components/GatewayList.js
@@ -31,9 +31,9 @@ export default class extends Component {
             <div id="gatewayList">
                 {
                     this.state.ports.map((port, index) => {
-                        return <div className="port" key={port.comName} onClick={() => {
-                            ipcRenderer.send("gateway/connect", port.comName)
-                        }} >{port.comName}</div>
+                        return <div className="port" key={port.path} onClick={() => {
+                            ipcRenderer.send("gateway/connect", port.path)
+                        }} >{port.path}</div>
                     })
                 }
                 <div className="port" onClick={() => {
diff --git a/src/utils/flasher/flasher-serial.js b/src/utils/flasher/flasher-serial.js
index b0108e9..32e9fb5 100644
--- a/src/utils/flasher/flasher-serial.js
+++ b/src/utils/flasher/flasher-serial.js
@@ -112,6 +112,7 @@ class Flash_Serial {
           return this._read(buffer, 1);
         })
         .then((length) => {
+            console.log(length, buffer, buffer.readUInt8());
           if ((length == 1) && (buffer.readUInt8() == ACK)) {
             resolve();
           } else {
@@ -189,11 +190,11 @@ class Flash_Serial {
 
     return new Promise((resolve, reject) => {
       this._ser.read(readBuffer, 0, 1)
-        .then((length) => {
+        .then((ret) => {
           if (readBuffer[0] == ACK) {
             resolve();
           } else {
-            console.log(length, readBuffer);
+            console.log(ret.bytesRead, readBuffer);
             reject('Expect ACK');
           }
         })
@@ -213,11 +214,14 @@ class Flash_Serial {
             this._ser.close();
         }, timeout);
 
+        var ret;
+
         while (read_length < length) {
-          read_length += await this._ser.read(readBuffer, read_length, length - read_length).catch((e)=>{
+            ret = await this._ser.read(readBuffer, read_length, length - read_length).catch((e)=>{
             clearTimeout(timer);
             reject(e);
           });
+          read_length += ret.bytesRead;
         }
 
         clearTimeout(timer);
@@ -301,9 +305,9 @@ class Flash_Serial {
         .then(() => {
           return this._ser.read(readBuffer, 0, 2);
         })
-        .then((l) => {
+        .then((ret) => {
           if ((readBuffer[0] & readBuffer[1]) != ACK) {
-            if ((l == 1) && (readBuffer[0] == ACK)) {
+            if ((ret.bytesRead == 1) && (readBuffer[0] == ACK)) {
               return this._wait_for_ack();
             }
 
diff --git a/webpack.build.config.js b/webpack.build.config.js
index fc23928..dba7698 100644
--- a/webpack.build.config.js
+++ b/webpack.build.config.js
@@ -53,7 +53,7 @@ module.exports = {
   target: "electron-renderer",
   plugins: [
     new HtmlWebpackPlugin({
-      title: "Hardwario Playground " + process.env.npm_package_version
+      title: "HARDWARIO Playground v" + process.env.npm_package_version
     }),
     new ExtractTextPlugin("bundle.css"),
     new webpack.DefinePlugin({
diff --git a/webpack.dev.config.js b/webpack.dev.config.js
index c349607..7b9de27 100644
--- a/webpack.dev.config.js
+++ b/webpack.dev.config.js
@@ -49,7 +49,7 @@ module.exports = {
   target: "electron-renderer",
   plugins: [
     new HtmlWebpackPlugin({
-      title: "Hardwario Playground " + process.env.npm_package_version
+      title: "HARDWARIO Playground v" + process.env.npm_package_version
     }),
     new webpack.DefinePlugin({
       "process.env.NODE_ENV": JSON.stringify("development")