diff --git a/docs/draft/variables/variables.md b/docs/draft/variables/variables.md
index 530c38b61..bb2b66f89 100644
--- a/docs/draft/variables/variables.md
+++ b/docs/draft/variables/variables.md
@@ -314,31 +314,29 @@ Each binary operators requires two arguments. Binary operator is written between
 
 -   These are also binary operators which results to boolean value
 
-`==`
+`==` equal to
 
-`!=`
+`!=` not equal
 
-`<`
+`<` greater than
 
-`>`
+`>` less than
 
-`<=`
+`<=` less than or equal to
 
-`>=`
+`>=` greater than or equal to
 
-`&&`
+`&&` and
 
-`||`
+`||` or
 
 ## Unary operators
 
-`+`
+`-` negate the value
 
-`-`
+`~` binary invert
 
-`~`
-
-`!`
+`!` logical invert
 
 ## Conditional (ternary) operator
 
@@ -361,7 +359,7 @@ The conditional (ternary) operator is the only operator that takes three operand
 
     -   Description: Index of current element in the List and Grid widget. Check the description of these two widget for the more information.
     -   Parameters:
-        -   Name: `index`. Type: `integer`. Description:
+        -   Name: `index`. Type: `integer`. Description: in case of nested List/Grid widgets use 0 for inner most List/Grid, 1 for List/Grid one up, etc.
     -   Return value:
         -   Type: `integer`. Description: element index
 
diff --git a/npm-module/package.json b/npm-module/package.json
index ba7a0db6b..d29bf58bf 100644
--- a/npm-module/package.json
+++ b/npm-module/package.json
@@ -3,7 +3,7 @@
     "author": "Envox <eez@envox.hr>",
     "description": "EEZ Studio for building standalone dashboard applications",
     "repository": "https://github.com/eez-open/studio",
-    "version": "0.0.26",
+    "version": "0.0.28",
     "revision": "1",
     "license": "GPL-3.0-only",
     "files": ["packages", "libs", "resources"]
diff --git a/package.json b/package.json
index 4737e88ba..df6662a9c 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
     "author": "Envox <eez@envox.hr>",
     "description": "Cross-platform visual development tool and SCPI instrument controller",
     "homepage": "https://www.envox.hr/eez/studio/studio-introduction.html",
-    "version": "0.10.3",
+    "version": "0.10.4",
     "revision": "1",
     "license": "GPL-3.0-only",
     "repository": "https://github.com/eez-open/studio",
@@ -34,7 +34,8 @@
         "electron-version": "electron --version",
         "publish-types": "cd packages/eez-studio-types && npm publish",
         "pubdoc-dev": "cd tools/pubdoc && tsc && cd build && node pubdoc.js --config ../config/dev.json",
-        "pubdoc-prod": "cd tools/pubdoc && tsc && cd build && node pubdoc.js --config ../config/prod.json"
+        "pubdoc-prod": "cd tools/pubdoc && tsc && cd build && node pubdoc.js --config ../config/prod.json",
+        "npm-module-publish": "node npm-module-publish.js"
     },
     "prettier": {
         "printWidth": 80,
diff --git a/packages/instrument/connection/connection-main.ts b/packages/instrument/connection/connection-main.ts
index 3c5fe95f9..8be9faaaa 100644
--- a/packages/instrument/connection/connection-main.ts
+++ b/packages/instrument/connection/connection-main.ts
@@ -521,23 +521,25 @@ export class Connection
         const delay =
             options && options.delay != undefined
                 ? options.delay
-                : this.connectionParameters.delay;
+                : this.connectionParameters.delay ?? 0;
+
         this.sendQueue.push({
             command: command + "\n",
             delay
         });
+
         this.dumpSendQueue();
 
         if (options && options.isQuery) {
-            this.sendTimeoutId = setTimeout(
-                () => {
-                    this.sendTimeoutId = undefined;
-                    this.sendTimeout();
-                },
+            const timeout =
                 options.timeout != undefined
                     ? options.timeout
-                    : this.connectionParameters.timeout
-            );
+                    : this.connectionParameters.timeout ?? 60000;
+
+            this.sendTimeoutId = setTimeout(() => {
+                this.sendTimeoutId = undefined;
+                this.sendTimeout();
+            }, timeout);
         }
     }