Grove HM-11 is stuck when receiving connection

I have a Grove HM-11 module, and it’s hooked up to my Arduino.



It’s working fine, I have set it to master mode to detect nearby Bluetooth devices.

I use these commands during cold boot up:

I also bought some cheap BLE iTAGs (about 2 dollars each). They are not very good and the range is only about 10 meters.

I always use AT+DISC? to start scanning. I do this every 5 seconds.

I noticed that the LED on the module is blinking.



I left everything on during the night. In the morning I came back, and I noticed that the BLE module is no longer responding to AT commands.

I also noticed that the LED on the BLE module no longer was blinking. Instead it was turned on.

From the terminal log I noticed the last text received from the BLE module: AT+CONN. What does this mean?



I remembered that when I connected the BLE module for the first time, the LED was also turned on.

The first thing I tried in the morning, was disconnecting the BLE module. When I did this, the iTAG started beeping?!



Is the iTAG responsible for this behavior?

Can I prevent that BLE devices connect to the BLE module?