This project is read-only.

RS232 to Arduino

Dec 6, 2013 at 1:45 AM
Someone posted a link to this project on the Color Computer mailing list ( and I had to check it out since I had been toying with a Hayes AT command parser myself for a project.

Can't wait to check it out.

What is involved in wiring up an RS232 port to an Arduino? When I was researching, it seemed getting a MAX232 or similar chip was necessary?
Dec 7, 2013 at 5:53 PM
The MAX237 chip has seven level shifters which is what you need to bring all of the control lines to RS232 levels. If you are only interested in Tx/Rx then there are shields already available and would work fine with the UNO version of Hayesduino.
Aug 14, 2014 at 8:12 PM
MAX237 based Mega Shields are in testing and will be available soon.