RAK811-H Joining with Incorrect channel in AS928 Region

LPWAN Modules / EVBs RAK811
1

Issue: RAK811-H when set to sometimes attempt to join on the frequency: 923800000 (not a TTN OTAA Join frequency)

Setup: Standard RAK811 Breakout with the firmware 3.0.0.3.H

Server: TTN

Details: Here is my connection data:

{
  "name": "ns.up.join.receive",
  "time": "2021-05-17T12:33:31.288419225Z",
  "identifiers": [
    {
      "device_ids": {
        "device_id": "rak",
        "application_ids": {
          "application_id": "testapp"
        },
        "dev_eui": "0000101011000001",
        "join_eui": "0000200000001000",
        "dev_addr": "00F7B0A5"
      }
    }
  ],
  "data": {
    "@type": "type.googleapis.com/ttn.lorawan.v3.UplinkMessage",
    "raw_payload": "AAAQAAAAIAAAAQAAERAQAADxsRLffd4=",
    "payload": {
      "m_hdr": {},
      "mic": "Et993g==",
      "join_request_payload": {
        "join_eui": "0000200000001000",
        "dev_eui": "0000101011000001",
        "dev_nonce": "B1F1"
      }
    },
    "settings": {
      "data_rate": {
        "lora": {
          "bandwidth": 125000,
          "spreading_factor": 7
        }
      },
      "data_rate_index": 5,
      "coding_rate": "4/5",
      "frequency": "923800000",
      "timestamp": 4237758724
    },
    "rx_metadata": [
      {
        "gateway_ids": {
          "gateway_id": "ttog",
          "eui": "000080029C2B2AA7"
        },
        "timestamp": 4237758724,
        "rssi": -73,
        "channel_rssi": -73,
        "snr": 8,
        "uplink_token": "ChIKEAoEdHRvZxIIAACAApwrKqcQhKLc5A8aDAibxYmFBhDI79WIASCg7+nwqu8E",
        "channel_index": 3
      }
    ],
    "received_at": "2021-05-17T12:33:31.287521297Z",
    "correlation_ids": [
      "gs:conn:01F5WGN2N024MCK08G7D05BZME",
      "gs:up:host:01F5WGN2NAGBGAREKBHA9C78GZ",
      "gs:uplink:01F5X52BMP2FHVF74D3JTYQ7D0",
      "ns:uplink:01F5X52BMQY0KG9P40VD60NPAB",
      "rpc:/ttn.lorawan.v3.GsNs/HandleUplink:01F5X52BMQG5DDA94CR8RV3MTZ"
    ],
    "consumed_airtime": "0.061696s"
  },
  "correlation_ids": [
    "gs:conn:01F5WGN2N024MCK08G7D05BZME",
    "gs:up:host:01F5WGN2NAGBGAREKBHA9C78GZ",
    "gs:uplink:01F5X52BMP2FHVF74D3JTYQ7D0",
    "ns:uplink:01F5X52BMQY0KG9P40VD60NPAB",
    "rpc:/ttn.lorawan.v3.GsNs/HandleUplink:01F5X52BMQG5DDA94CR8RV3MTZ"
  ],
  "origin": "ea2b6361d534",
  "visibility": {
    "rights": [
      "RIGHT_APPLICATION_TRAFFIC_READ"
    ]
  },
  "unique_id": "01F5X52BMR7QWERMS20VFVTZBT"
}

As you can see the connection frequency is incorrect.
Are there any plans to fix this?

2

Hi @Kevin192291 ,

The AS923 band of RAK811 FW has 8ch opened by default. This is to match the RAK developer gateway.

* 0,on,923200000,2,5; * 1,on,923400000,2,5; * 2,on,923600000,2,5; * 3,on,923800000,2,5; * 4,on,924000000,2,5; * 5,on,924200000,2,5; * 6,on,924400000,2,5; * 7,on,924600000,2,5; 8,off,0,0,0; 9,off,0,0,0; 10,off,0,0,0; 11,off,0,0,0; 12,off,0,0,0; 13,off,0,0,0; 14,off,0,0,0; 15,off,0,0,0

We will update this on the next FW release.

For now, you can turn off the other channels and just open up channels 0 and 1.

3

Thank you very much for the response, I will try this.
Btw, When do you think the next FW release may be?

Thanks again!

4

The SW team is working on it now together with other FW improvements. I’ll let you know as soon as we release it.

I hope the work-around for you.

5

I have tested the workaround it it works perfectly. Can I turn the channels 2-8 back on after joining?

6

Hi Kevin, the other channels will be automatically turned on after joining so you don’t need to do anything.

To verify, you can check via at+get_config=lora:channel

7

Hello,
After turning the channels off, and issuing the at+join the channels are not set to on when
I run at+get_config=lora:channel, they appear to remain off.

8

Hi @Kevin192291 ,

What gateway do you use? Also, what is your specific AS923-x subband?

Can you share me the channels before and after a successful join?

9

I am in AS923-JP
I ran: at+get_config=lora:channel and got

OK * 0,on,923200000,2,5; * 1,on,923400000,2,5; 2,off,923600000,2,5; 3,off,923800000,2,5; 4,off,924000000,2,5; 5,off,924200000,2,5; 6,off,924400000,2,5; 7,off,924600000,2,5; 8,off,0,0,0; 9,off,0,0,0; 10,off,0,0,0; 11,off,0,0,0; 12,off,0,0,0; 13,off,0,0,0; 14,off,0,0,0; 15,off,0,0,0

Then ran at+join, and got:
OK Join Success

Then ran at+get_config=lora:channel and got:
OK * 0,on,923200000,2,5; * 1,on,923400000,2,5; 2,off,923600000,2,5; 3,off,923800000,2,5; 4,off,924000000,2,5; 5,off,924200000,2,5; 6,off,924400000,2,5; 7,off,924600000,2,5; * 8,on,922200000,0,5; * 9,on,922400000,0,5; *10,on,922600000,0,5; *11,on,922800000,0,5; *12,on,923000000,0,5; 13,off,0,0,0; 14,off,0,0,0; 15,off,0,0,0

It seems that 2-8 are still OFF, is that bad or is that supposed to happen?

Thanks!

10

Hi @Kevin192291 ,

That is ok as you see here in the TTN Frequency Plan (Frequency Plans | The Things Network)

image
image325×538 20.6 KB

1 Like
11

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