Building a new project

I am attempting to build a project and need some help…

I wish to transmit a unique ID 100’. This ID would be picked up by a receiver attached to a Netduino Plus board and the ID sent to my website.

I am presently using 315MHz frequency. I can press a button on the transmitter and the receiver picks up the signal and hits my site. My site simply logs that it received the signal.

I now need to transmit an ID. I prefer to transmit an 8 character alpha-numeric ID.

Can anyone assist please?

Any of the small micro-controllers (processors) could send a serial ID value like one of the Aduino boards.