LoRaWAN Passive ROaming

ChirpStack Network Server
1

Hello All,

I installed Chirpstack on an Ubuntu server.

Trying playing with Passive Roaming API, i got this strange Error, don’t know how to handle it.

{“ProtocolVersion”:“1.0”,“SenderID”:“000000”,“ReceiverID”:“000001”,“TransactionID”:21,“MessageType”:“PRStartAns”,“VSExtension”:{},“Result”:{“ResultCode”:“Other”,“Description”:"unmarshal json error: encoding/hex: invalid byte: U+0078 ‘x’"}}

JSon Message:

{
“ProtocolVersion”:“1.0”,
“SenderID”:“000001”,
“ReceiverID”:“000000”,
“TransactionID”:21,
“MessageType”:“PRStartReq”,
“PHYPayload”:“0x806cbfab1d80000002fc7fa80c17d55b855ca8a014”,
“ULMetaData”:{
“DevAddr”:“0x1d…”,
“DataRate”:4,
“ULFreq”:868.3,
“RecvTime”:“2021-12-08T05:53:07.000+01:00”,
“RFRegion”:“eu868”,
“GWInfo”:[
{
“ID”:“0x00AACC12”,
“RFRegion”:“eu868”,
“RSSI”:-33,
“SNR”:10.500000,
“Lat”:0.000000,
“Lon”:0.000000,
“ULToken”:“7B226C72726964223A…”,
“DLAllowed”:true
}
]
}
}

2

Which version are you using?

3

Hello @brocaar I am using version 3.15.3

image
image951×383 97.1 KB

4

I had no idea what passive roaming was nor its benefits.

Ideas for your problem:

  • Are you passing any hex values to chirpstack that start with prefix “0x”? (U+0078 is a lower case ‘x’)
  • Could it be a browser character set issue?

Good luck.

5

Yes we are transmiting this king of values as you can see:

I updated the LNS to the last version and will do some other tests.
Roaming is the ability for 2 operators to establish an agreement to allow devices from operator B to uplink messages via LNS operator A that will foward to LNS operator B.

1 Like
6

No more issue since i updated the platform to the last version.

Thanks @fmgst & @brocaar

1 Like