Hi! i am a beginner about arduino and codding Please help me in designing Laser security system sms sim800l power by ardruino and how to code for it
Hey Ryan160,
Looks like you did a good job planning the circuit. I’d recommend using a different power source, though, because a 9v battery won’t hold for long.
Regarding the code, please provide more details about the logic of the project, and which parts you’re having trouble with. It will help others to help you 
Good luck with your project!
Anat