Hm-10 AT command problems

I was able to send AT command with arduino mega2560 but after sending the AT+ADTY1, i can't anymore. The led is flashing quickly and seem to be in Ibeacon mode. Since then, i can't send AT COMMAND anymore. No response frm the module. Is there i way to come back to ADTY0 mode?

Ths in advance

http://www.martyncurrey.com/hm-10-bluetooth-4ble-modules/