inews2 / hayes

Hayes Modem emulator for Raspberry Pi

Hayes

Connect vintage computers to the Internet. Turn a Raspberry Pi 3, some associated hardware bits, and some Go into a fully functional and RS-232 compliant Hayes Smartmodem.

Command line options:
  -addressbook file
    	Address Book file (default "./addressbook.json")
  -keyfile file
    	SSH Private Key file (default "./id_rsa")
  -logfile file
    	Default log file (default stderr)
  -nossh
    	Don't start SSH server (default false)
  -notelnet
    	Don't start telnet server (default false)
  -serial device
    	Serial device (eg, /dev/ttyS0)
  -speed speed
    	Serial Port speed (bps) between DTE and DCE (default 115200)
  -sshport port
    	Network port number for inbound sshd sessions (default 22000)
  -syslog
    	Log to syslog (default false)
  -telnetport port
    	Network port number for inbound telnet sessions (default 20000)

Modem commands supported:

• ATA - Answer
• ATD - Dial
• ATE - Command state echo
• ATH - Hook command
• ATL - Speaker volume
• ATM - Speaker on/off
• ATO - On-line command
• ATQ - Result code options
• ATS - Register commands
• ATV - Result code fomat
• ATW - Negoitation Progress message selection
• ATX - Call progress options
• ATZ - Soft reset
• AT&C - Carrier Data Detect (CDC) options
• AT&D - Data Terminal Read (DTR) options
• AT&F - Recall factory profile (factory reset)
• AT&S - Data Set Ready (DSR) options
• AT&V - View Configuration Profiles
• AT&W - Write active profile to memory
• AT&Y - Select stored profile for hard reset
• AT&Z - Store telephone number

Modem Command Extensions:

• AT* - Show internal state
• AT*network - Show network status
• AT*ledtest - Run the LED test
• AT*help - debug comamnd help
• ATDHhost:port - Dial host:port
• ATDEhost:port|username|password - Dial host:port|username|password using an SSH tunnel
• AT&Zn=D - Delete phone book entry n
  • NOTE: The addressbook configuration file allows phone number:<host, port, protocol, ... > mapping to enables traditional number based dialing.

"Faked" Modem Commands (perform no action but return OK):

• ATB
• ATC
• ATF
• ATI - Internal tests (just parrots a Hayes Smartmodem 96)
• ATN
• ATP
• ATT
• ATY
• AT&A
• AT&B
• AT&G
• AT&J
• AT&K
• AT&L
• AT&M
• AT&O
• AT&Q
• AT&R
• AT&T
• AT&U
• AT&X

RS232 compliance:

• SD/TX, RD/RX, DSR, DTR, RI, DCD pins are supported.
• RTS/CTS flow control is not (AT&K0 is set), alhough the pins are active.

Parts needed:

• Raspberry Pi 3
• MAX3232 IC's (3)
• DB9
• Some jumpers
• Some LEDs and resistors

The docs/ directory has some basic pin mappings and a crude Fritzing diagram (https://github.com/wfd3/hayes/blob/master/docs/Modem%201.fzz).