Start here:
This repo will be populated with projects for connecting your your IOT boards such as Raspberry Pi, ESP 32 and Arduino to the Web Applications running at https://helloworld.co.in/iot and make use of the online widgets there to to visualise your sensor data online.
You need to create an account here to access your online widgets.
When you create an account, you will receive an Authentication Token via email. The token is 32 byte long alphanumeric string as shown in the example below.
It is required to be pasted in the code to connect your device with online widgets.