An ESP8266 based RS232 <-> WiFi modem with Hayes AT style commands and LED indicators. It makes the appropriate noises.

This project grew out of a desire to get an old Ampro LB+/Z80 hooked up to the Internet. Right from the start, I knew I wanted a row of LED indicators at the front of the modem so that it would be reminiscent of an old Hayes Smartmodem. (I briefly considered finding an old Smartmodem on eBay, but soon remembered that the case had in fact been made of metal; they don't build 'em like that anymore.) Since the modem was going to be hooked up to the Little Board's serial port, I needed an actual RS-232 level serial port, with either a DB-25 or DE-9 connector. And finally, since I wanted the Hayes style LEDs, I thought it would be handy to have the Hayes AT commands too, at least as close as I could manage.

This is the sort of project that you can build yourself, for fun. Even the right kinds of project boxes are linked in the bill of materials, along with the Kicad schematics and greyprints for the panels.

The default serial configuration is 9600bps, 8 data bits, no parity, 1 stop bit.