I tried using different blynk accounts but still it shows device wasn’t online yet . I am sure that I have given correct authentication token in my code . Help me in fixing this.
When you created this post it was pre-populated with a template guide that outlined the sort of data you should provide when making the post.
Without that information nobody will be able to help unless they’re prepared to do a ‘20 Questions’ routine with you.
Help yourself by providing the sort of information that’s needed to be able to help you.
Pete.