so I'm creating a project where I will be monitoring how many people enter and exit a room, and at the end of the day will send a message to a phone stating how many people altogether. I also need an LDR to make this project is a requirement.
I want to use the ARDUINO MKR GSM 1400 board because I need it to connect to a 4G network.
To send messages I got the SIM900 based GSM Shield
if there is a simpler way to do this exact project please help. the thing that hinders my work is the network connectivity(which needs to be 4G).