The LPG gas is commonly used for cooking, and it is a very common practice to cut off the gas supply by closing the valve.
Suppose I am away from my home and I forgot to check whether my LPG supply is cut-off. Is it possible to make a device that can email me a status of LPG supply whether on or off, and if possible switch it off remotely?
The quick answer is yes, it is possible.
You can add a pressure sensor and a servo-actuated valve to your gas line and sample / control them via your choice if micro-controller. You should take every precaution to do this properly - preferably with the assistance of a properly licensed contractor, since leaky gas lines can cause massive damage to life and property.
You'll also want to take precautions on the software side so that only you can control the Servo, such as two-way encryption and authentication.
