Arduino Micro Bluetooth - not working after Power off

Hello,

I am using and Arduino Micro with this BT module.

The good:
When I Upload the program to Arduino, I connect my phone via BT & send some messages, I open the serial monitor(on my PC) to see the message(s) length (also I made a LED blink) - everything works perfectly!

The bad & ugly:
When I Power off the Arduino, then plug it back in, nothing works.

Here's a small code sample displaying how I get data (via Serial1) from the BT module:

if(Serial1.available()){ 
    int strLen= 0;
    strLen= ReadStringFromSerial();
    Serial.write(strLen); 
    }

If anyone knows why this is happening and/or how it may be solved please help :slight_smile:

Possibly caused by the code you don’t show.