It was three days ago I found that bluetooth can be accessed by web content in Chrome! So I have written a webpage as new client for our previous bluetooth project.

First, install the server-side program on your pi, see how: https://github.com/PiSugar/sugar-wifi-conf 

Then you can connect your pi through BLE with your laptop or smartphone by opening this link in chrome app: https://www.pisugar.com/sugar-wifi-conf

Since web bluetooth has not been widely supported yet, I have tested on several devices:

• It works well with latest Chrome for MacOS and Android.
• On Win10, Chrome is able to detect the bluetooth but I am not able to open it, which is pretty strange. (If you can open it, please do tell me how)
• Chrome for iOS doesn't support web-bluetooth. There is an ios app called WebBLE which implements the web-bluetooth api. However, it doesn't works. It seems different from the standard api. I will see how to fix this later.

For other compatibility information please see here.

UPDATE

It's able to run on iOS now!

The iOS problem I mentioned above, it's because WebBLE browser only supports the early version of web-bluetooth api, which doesn't include "getCharacteristics" method. (Click here to see more detail) Therefore I had to use the old way to get characteristics when it runs on iOS.

Make sure you have install the latest version of sugar-wifi-conf on your pi. Download the WebBLE app and open this link: https://www.pisugar.com/sugar-wifi-conf