RAK2245 Concentrator

My IoT node based on SX1276 is sending the Join Request to my Gateway based on SX1301 and SX1257 (RAK2245 board). I see the Class A IoT node spitting the message saying that it is sending the Join request. However I am not seeing the Join request at the concentrator. Is there some special debug I need to enable to see the packets received by the concentrator?

I am using the gateway supplied by SemTech at https://github.com/lorabasics/basicstation.

Any help is appreciated.

thanks
Sree

Hi @sgodey,

I would advice you flash the following firmware.
https://downloads.rakwireless.com/en/LoRa/RAK2245-Pi-HAT/Firmware/
Instruction manual for doing so:
https://downloads.rakwireless.com/en/LoRa/RAK2245-Pi-HAT/Application-Notes/

Regards
Vladislav

Hi Vladislav:

Once I flash the OS image and I run
%>sudo gateway-config

What should I set? I have my own LoRa Server in my own LAN/WAN. I should just be setting the Channel Plan? Will this update the firmware?

thanks
Sree

Hi @sgodey

Which LoRa Server are you using? Is it loraserver.io or other LoRa Server?

If your own LoRa Server is loraserver.io, you can have a look at the document which @Hobo has mentioned. In that document, the 6.2.2 section has introduced how to configure your LoRa Gateway to connect with a loraserver.
image

image

image
In the picture 3, you should fill it with your own LoRa Server’s IP address.

If your own LoRa Server is other LoRa Server, you can do as follow:
image
Choose the item 3 to open the configuration file, then you can see some contents as follow:


Just edit them according to your own LoRa Server’s information.

1 Like

Hi Fomi:

I have a simple home grown Lora Server based on Node.js.

thanks
Sreekanth

I have run a radio calibration test provided by libloragw library. Below is the output. Something seems to be wrong in my RF settings. Can someone help …

[email protected]:~/deps/lgw/platform-rpi/libloragw $ ./test_loragw_cal -a 925.1 -b 923.3 -r 1257 -n 2
Library version information: Version: 5.0.1;
Radio type: 2
Radio A frequency: 925.100000 MHz
Radio B frequency: 923.300000 MHz
Number of calibration iterations: 2
Calibration command: brd: 0, chip: 1257, dac: 3

Rx A IQ mismatch: Amp: -9 Phi: 15 Rej: 51 dB Status: 143 | Debug: Rej: 56 dB Lna: 1 BB: 15 Dec: 7
Rx A IQ mismatch: Amp: -9 Phi: 14 Rej: 53 dB Status: 143 | Debug: Rej: 64 dB Lna: 1 BB: 15 Dec: 7

Rx B IQ mismatch: Amp: 8 Phi: 8 Rej: 55 dB Status: 151 | Debug: Rej: 58 dB Lna: 1 BB: 15 Dec: 7
Rx B IQ mismatch: Amp: 8 Phi: 8 Rej: 53 dB Status: 151 | Debug: Rej: 63 dB Lna: 1 BB: 15 Dec: 7

Tx A calibration bypassed

Tx B calibration bypassed

Rx A IQ mismatch calibration statistics on 2 iterations (min, max):
Amp: -9 -9 Phi: 14 15 Rej: 51 53 dB (capt.: 56 64 dB)

Rx B IQ mismatch calibration statistics on 2 iterations (min, max):
Amp: 8 8 Phi: 8 8 Rej: 53 55 dB (capt.: 58 63 dB)

End of radio calibration test

Below is calibration log which report problem with radio A for image rejection and radio B for TX imbalance.

Can RAK experts comment on this? Is my concentrator bad?

[email protected]:~/deps/lgw/platform-rpi/libloragw $ ./test_loragw_cal -a 925.1 -b 923.3 -t 3 -r 1257 -n 10
Library version information: Version: 5.0.1;
Radio type: 2
Radio A frequency: 925.100000 MHz
Radio B frequency: 923.300000 MHz
Number of calibration iterations: 10
Calibration command: brd: 0, chip: 1257, dac: 3

lgw_connect:532: INFO: no FPGA detected or version not supported (v0)
Note: success connecting the concentrator
lgw_setup_sx125x:407: Note: SX125x #0 version register returned 0x21
lgw_setup_sx125x:415: Note: SX125x #0 clock output disabled
lgw_setup_sx125x:469: Note: SX125x #0 PLL start (attempt 1)
lgw_setup_sx125x:407: Note: SX125x #1 version register returned 0x21
lgw_setup_sx125x:412: Note: SX125x #1 clock output enabled
lgw_setup_sx125x:473: Note: SX125x #1 kept in standby mode
Rx A IQ mismatch: Amp: -6 Phi: 18 Rej: 50 dB Status: 143 | Debug: Rej: 46 dB Lna: 1 BB: 15 Dec: 7
WARNING: problem in calibration of radio A for image rejection
Rx A IQ mismatch: Amp: -10 Phi: 15 Rej: 48 dB Status: 135 | Debug: Rej: 45 dB Lna: 1 BB: 15 Dec: 7
WARNING: problem in calibration of radio A for image rejection
Rx A IQ mismatch: Amp: -11 Phi: 13 Rej: 48 dB Status: 135 | Debug: Rej: 46 dB Lna: 1 BB: 15 Dec: 7
Rx A IQ mismatch: Amp: -9 Phi: 15 Rej: 51 dB Status: 143 | Debug: Rej: 44 dB Lna: 1 BB: 15 Dec: 7
WARNING: problem in calibration of radio A for image rejection
.
.
.
Tx B DC offset I : 90 26 -86 123 -49 84 -46 -24
Tx B DC offset Q : 82 -84 37 -106 -20 -14 125 39
Tx B DC rejection: 28 26 25 22 25 20 25 27
Tx B DC debug BB : 15 15 15 15 15 15 15 15
Tx B DC debug Dec: 7 7 7 7 7 7 7 7
Tx B DC Status : 199
WARNING: problem in calibration of radio B for TX imbalance

Hi @sgodey
What are you using, Basic Station or RAK “station” :slight_smile: .
Please download and install RAK software for RAK2245 from here RAK Git . Or download SD image from here RAK2245 SD.
And make the same tests.

Regards
Todor

Hi Todor:

Thanks for the reply. I still see Image rejection errors on RadioA and RadioB. What could be the problem?

BR,
Sreekanth

Hi @sgodey,

To summarize:

  1. You downloaded the Software from the links @velev provided.
  2. You flashed it on the SD card
  3. You went through the manual in the link: Firmware.
  4. Successfully pointed the Gateway Packet forwarder to your homwgrown LoRa Server Gateway Bridge.
  5. You are still having issues !!!

Is this the above correct ?

Regards
Vladislav