Getting gateway EUI which has send the downlink

HofIoT · September 21, 2020, 11:49am

Is there a possibility to get the gateway EUI which has emitted the downlink?
I do not see, that this is somewhere stored in InfluxDB nor in MQTT messages.

brocaar · September 28, 2020, 2:00pm

This is currently not exposed. Potentially it could be implemented as part of this message (sent by the ChirpStack Application Server):

github.com

brocaar/chirpstack-api/blob/master/protobuf/as/integration/integration.proto#L154


    // Downlink frame counter to which the acknowledgement relates.
    uint32 f_cnt = 6;

    // User-defined device tags.
    map<string, string> tags = 7;
}

// TxAckEvent is the message sent when a downlink was acknowledged by the gateway
// for transmission. As a downlink can be scheduled in the future, this event
// does not confirm that the message has already been transmitted.
message TxAckEvent {
    // Application ID.
    uint64 application_id = 1 [json_name = "applicationID"];

    // Application name.
    string application_name = 2;

    // Device name.
    string device_name = 3;

    // Device EUI.

Could you please create a GitHub issue for this in https://github.com/brocaar/chirpstack-application-server?

HofIoT · September 29, 2020, 6:47am

Hi @brocaar,
this is the GitHub issue #537

I think it would be good to know which gateway has emitted the downlink (maybe also with information which tx window 1 or 2 or immediatly, the frequency and datarate).

brocaar · September 29, 2020, 12:34pm

Agreed. I think in this case the TxAckEvent would be extended with a tx_info field, holding all the TX parameters