json rxpk.brd parsing value

[gillespilloudkerlink]

Is this a bug or a feature request?

maybe a bug

What did you expect?

On my lora-gateway-bridge the packets are not transmitted to the loraserver due to a json parsing error :

on the JSON, the brd value is 261 (incorrect uint8 value)

Have you an idea about the root cause error ?

[gillespilloudkerlink]

I can't see the brd field in the https://github.com/Lora-net/packet_forwarder/blob/experimental/PROTOCOL.TXT i will check with my packet forwarder provider if the value is correct and if values upper than 255 will be provided in the future.

[brocaar]

The brd is used by for example the iBTS gateway as it can contain up to 4 boards (each serving 16 channels). I could change from uint8 to a type able to store larger numbers, but it would be good to validate what brd: 261 means :-)

[gillespilloudkerlink]

So,

on the https://github.com/brocaar/loraserver/blob/master/api/gw/gw.pb.go#L558 it's defined as an uint32.

From kerlink collegues :

On PROTOCOL.TXT and the protocol GWMP 1.5, Semtech has defined a brd field as : brd | number | Concentrator board used for RX (unsigned integer)

There is no size defined. the lns must transmit the value without change (blackbox for the LNS).

Kerlink use this field to transmit more information on it :

Bits	Name	Description
31-24		Unused
23-20	Zone	Antenna zone (refers to the system)
19-16	Antenna	Antenna identifier (refers to the system)
15-12	Board	Board identifier (refers to the system)
11-8	Transceiver	Transceiver identifier (refers to the board)
7-4	Demodulator	Demodulator identifier (refers to the board)
3-0	Channel	Channel identifier (refers to the demodulator)

is it ok for you to transform the field to uint32 (I can prepare a PR) ?

[brocaar]

Yes, please do :-)