Hello I'm Robert Young,
I have 30+ years of experience in writing code, most of it interfacing to hardware. Since you didn't specify in your description I'm assuming you don't have an RFID reader already, so my quote includes the price of purchasing one. Also sending SMS messages from a server for FREE is problematic, especially in a production environment, you would need to subscribe to a service, and let me integrate it into the code. Lastly, do the students have a "badge" that the RFID reader reads, or were you planning on students using their phone's NFC capabilities? You should ask other Freelancers you are considering hiring, how they intend to handle these issues. I do know of a way to send a message to parents etc from server for free, but it is not an SMS message. In short I CAN do this for you, I'm sure I can successfully complete your project in a way that will not only satisfy you, but impress you.
I am semi-retired, I'm here on Freelancer to supplement my retirement income, so if you hire me you will be getting top notch experience at a really great price.
Please contact me and let's talk about what I can do for you.
Thanks,
Robert Young
Call/Txt: 408.666.2509