Get roles list

4a-api roles gives you the list of different roles in a json format.

$ 4a-api roles
Detected systemd unit file!
Port detected: 1025
ON-REPLY 1:ahl-4a/get_roles: OK
{
  "response":[
    "radio",
    "multimedia",
    "emergency",
    "navigation"
  ],
  "jtype":"afb-reply",
  "request":{
    "status":"success"
  }
}