Chirpstack v4 Downlink HTTP URL & JSON Format

[Ronit_Vairagi]

Hi I’m using HTTP integration with my application, and I am getting the uplink data from the LNS.

However, I’m not able to send downlinks to my devices. I’m initially testing using postman. Below are the details:

URL : http://LNS_IP_HERE:8080/api/devices/DevEUI_HERE/queue
Headers: ‘Authorization’ : ‘API_KEY_HERE’
Body:

{
    "deviceQueueItem": {
        "dev_eui": "*DevEUI_HERE*",
        "confirmed": false,
        "data": "AQID",
        "fPort": 11
    }
}

I’m getting 400 Bad Request error for the above.

[ccall48]

Headers: ‘Authorization’ : ‘Bearer API_KEY_HERE’

try adding Bearer ^ before the api key like above.

[Ronit_Vairagi]

@ccall48 : Do you mean like this:

This did not work btw. Am I doing something wrong again?

[sagarpatel]

Hi @Ronit_Vairagi

You must set the Grpc-Metadata-Authorization header to Bearer <API TOKEN>.

[ccall48]

@sagarpatel has it correct… try that as the authorization and you should be set.

[sagarpatel]

@ccall48 Yes this is correct please check the below screenshot