Hi,
What do you mean by after issuing AT+CPOF=1(ON/OFF pin low)it does not switches off normally but freezes.How do you confirm it?
NOT1 : After powering off module uisng AT+CPOF=1 with ON/OFF pin LOW,this cane be deactivated on only when the ON/OFF pin is HIGH(if pin is low,hard reset will not make module come out of power off mode).
Thanks.