Hi, are you trying to control over cloud or locally?
Also make sure LED connections are correct. i.e. +ve Leg of LED in Pin4 and -ve Leg of LED in GND.
I am also having the same problem and have made the correct connections. On loading the webpage of my bolt, I open console to find the error(Failed to load resource: the server responded with a status of 404 (Not Found))
can you send a screenshot of the URL you are trying to access as well as a screenshot of your code for verification
Please open console log in chrome and see if any error or warning message is there.
Also, check if your are typing the correct file name for bolt file.
Ok, So now I have got it working as I manually added bolt.js file to sdcard which can be found at