The GSM-AUTO is a GSM remote control switch, it connects to the cell phone network and like a cell phone has its own cell phone number. The unit is activated by calling its cell phone number, it will recognise an authorised telephone number calling it, reject the call without answering and switch on or off the device connected to it, because it rejects the call without answering there are no call costs incurred.

It has 2 independent relay switches with normally open and normally closed switch contacts, these can be programmed to switch on for a pre determined length of time whenever the GSM-AUTO is called.

The relay switches can also be temporarily or permanently switched on or off by sending a sms text message command. It can report the relay status by sending back a text message.




Applications are endless and include the remote control of heating and air conditioning in holiday homes, lighting, engine pre-heaters, aviation engine heaters, irrigation systems, water well pumps, pumping stations, cabin heaters, power cycle and reboot of remote servers, routers and computers.


Quad band GSM-850, GSM-900, GSM-1800 and GSM-1900 MHz so it will work anywhere in the world where there is a GSM cell phone network available.

Two independent relays that can be programmed to switch on for a period of time between 1 second and 18 hours when the unit is called. Two access modes are available, open access where the unit will respond to any incoming call, and secure access where it will only respond to programmed authorized telephone numbers.

Up to 500 authorized user telephone numbers can be added to the white list, when the secure access mode is activated only the numbers in the white list are able to activate the GSM-AUTO. Authorized numbers can be added and deleted as required by sending the unit sms text commands.

The relays can be permanently switched on or off by sending  a text message command, a confirmation text can be returned if required.

The relays can be temporarily switched on for a period of time between 1 second and 18 hours by sending a text message command, a confirmation text can be returned when the relays turn on and off if required.

Two relay’s with normally open (N.O) and normally closed (N.C) contacts, maximum switching capacity is 10 amps @ 230V ac per relay.

Please note:

You will need a SIM card, the GSM-AUTO is not locked to any cell phone network so it can be used with any GSM network provider.

You will also need a 12 volt DC power supply with a current rating of 500mA (0.5 Amp) – supplied free to orders shipped to the USA.

For further information you can download the instruction manual below (PDF format)

gsm remote control

gsm-auto connections

Power supply 12V DC @ 500mA
Power consumption
Maximum during communication 500mA, typically 50mA
Relay contacts
2 x Normally Open and Normally Closed contacts maximum switching capacity 10 amps @ 230V ac per relay
GSM Bands GSM-850, GSM-900, GSM-1800, GSM-1900 MHz
Operating temperature -20°C to 55°C
Physical size 130 x 100 x 50 mm
Protection IP 65
Approvals CE, FCC