GSM Control System
ESIM251 is a microcontroller based device used to inform users about the alarm in automatic or security systems and control one electric appliance -relay.Alarm and control system ESIM251 works over GSM network.
It works 24/7, it always reacts to the incoming signal.
ESIM251 can control 1 electronic appliance (a relay) sending a password and a special command from a GSM phone of any of the users. You can, for example, turn on the heating, lighting, lift the gates, blinds etc.
The system will ignore requests coming from unknown telephone number or SMS message with wrong password.