Readme improvement, add package.json

.gitignore

@@ -0,0 +1 @@
+node_modules

README.md

@@ -1,9 +1,22 @@
 # Javascript implementation of esptool
 
+This repository contains a Javascript implementation of [esptool](https://github.com/espressif/esptool), a serial flasher utility for Espressif chips. Unlike the Python-based esptool, `esptool-js` doesn't implement generation of binary images out of ELF files, and doesn't include companion tools similar to [espefuse.py](https://github.com/espressif/esptool/wiki/espefuse) and [espsecure.py](https://github.com/espressif/esptool/wiki/espsecure).
+
+`esptool-js` is based on [Web Serial API](https://wicg.github.io/serial/) and works in Google Chrome and Microsoft Edge, [version 89 or later](https://developer.mozilla.org/en-US/docs/Web/API/Serial#browser_compatibility).
+
+## Live demo
+
+Visit https://espressif.github.io/esptool-js/ to see this tool in action.
+
+## Testing it locally
+
 ```
-npm install xterm
-npm install crypto-js
-python2 -m SimpleHTTPServer 8008
+npm install
+python3 -m http.server 8008
 ```
 
-Then browse http://localhost:8008
+Then open http://localhost:8008 in Chrome or Edge.
+
+## License
+
+The code in this repository is Copyright (c) 2021 Espressif Systems (Shanghai) Co. Ltd. It is licensed under Apache 2.0 license, as described in [LICENSE](LICENSE) file.

index.html

@@ -25,13 +25,16 @@ <h2> Program </h2>
                     <br/>
                     <input class="button" type="button" id="eraseButton" value="Erase Flash" />
                     <br/>
-                    <input type="text" id="offset1" name="offset1">
+                    <label for="offset1">Bootloader</label>
+                    <input type="text" id="offset1" name="offset1" value="0x1000">
                     <input type="file" id="selectFile1" name="selected_file1">
                     <br/>
-                    <input type="text" id="offset2" name="offset2">
+                    <label for="offset2">Partition table</label>
+                    <input type="text" id="offset2" name="offset2" value="0x8000">
                     <input type="file" id="selectFile2" name="selected_file2">
                     <br/>
-                    <input type="text" id="offset3" name="offset3">
+                    <label for="offset3">App</label>
+                    <input type="text" id="offset3" name="offset3" value="0x10000">
                     <input type="file" id="selectFile3" name="selected_file3">
                     <br/>
                     <input class="button" type="button" id="programButton" value="Program" />

package.json

@@ -0,0 +1,6 @@
+{
+  "dependencies": {
+    "crypto-js": "^4.0.0",
+    "xterm": "^4.13.0"
+  }
+}