I am facing very basic level issue with RN4678. I purchased a module from https://www.mikroe.com/rn4678-click

I want to simply communicate with it through serial port. To do that I connected it to PC by usb to TTL. Whatever I send, I don't get any response from module. Then parallely I paired it with mobile phone and on successful connection, from Android app terminal I tried the same and nothing happened. If I send something from PC, I get it on mobile but reverse doesn't work. And the main issue is Module doesn't respond at all. I tried 3modules as well.
Help would be appreciated.

migrated from superuser.com Jan 8 at 21:56

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