openwrt-packages-dist/utils/rtty/files/rtty.config

# You must specify an interface or id,
# If the id is not specified, RTTY will uses the MAC address
# of the interface you specify as its ID, otherwise the id
# you specify is used as its ID

#config rtty
#   option  interface   'lan'
#   option  id          'My-Device'
#   option  description 'Description of my device'
#   option  host        'your-server-host'  # Server host
#   option  port        '5912'              # Server Port
#   option  ssl         1                   # Whether to use ssl
#   option  keepalive   5                   # keep alive in seconds for this client