How to add ignition on/off timings in DB for each devices

shaik abdullah3 years ago

Hi,
I want to add ignition on/off timings in DB for each devices. and I need to calculate the total (online-device) timings per day and need to store this too in DB. And finally by the API callwith device id means it should return the response with stored calculated time per day.

Is it possible to add custom fields in DB ? if yes then where do I code for that in java(source-code) ?