I want to enable alexa voice control for my smart home device. I was able to discover device. Now all devices are showing in alexa app. But all are showing as device is unresponsive.
This is my Discovery Request :

{
  "directive": {
    "header": {
      "namespace": "Alexa.Discovery",
      "name": "Discover",
      "payloadVersion": "3",
       "messageId": "3da2991d-17b7-46ac-bf17-57f0dd692c3e"
    },
    "payload": {
      "scope":{
        "type": "BearerToken",
        "token": "my access token"
      }
    }
  }
}