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iRobb
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Joined: Sun Jan 28, 2024 5:22 pm

No LORA packets forwarded by KNOT LR8 and ROS 7.13.3

Sun Jan 28, 2024 9:34 pm

Hi,

I'm trying to setup a LORA device with my KNOT LR8 and local hosted chirpstack server. My initial test with an earlier firmware worked, but since I've upgraded to 7.13.3 the KNOT do not forward received packets to my local chirpstack server or TTN. As I thought it's caused by a problem with the upgrade, I did factory reset the KNOT and did a new configuration.

admin@lora1] /system/resource> print
uptime: 2h42m7s
version: 7.13.3 (stable)
build-time: Jan/24/2024 13:16:46
factory-software: 7.0.5
free-memory: 23.2MiB
total-memory: 64.0MiB
cpu: MIPS 24Kc V7.4
cpu-count: 1
cpu-frequency: 650MHz
cpu-load: 2%
free-hdd-space: 108.6MiB
total-hdd-space: 128.0MiB
write-sect-since-reboot: 1894
write-sect-total: 135623
bad-blocks: 0%
architecture-name: mipsbe
board-name: KNOT R
platform: MikroTik

The gateway is enabled on the KNOT


[admin@lora1] /iot/lora> print
Flags: X - disabled
0 name="gateway-0" status="Enabled" gateway-id="XXXXXXXXXXXXXX" firmware-id="XXXXXX" servers="" channel-plan=eu-868 antenna-gain=0dBi
forward=crc-valid,crc-error network=public lbt-enabled=no listen-time=5000us rssi-threshold=-65dBm band=863-870 locks="" antenna=uFL


The server is setup and pingable which also proof that IP can be resolved with DNS

[admin@lora1] /iot/lora> servers/

[admin@lora1] /iot/lora/servers> print
Columns: NAME, UP-PORT, DOWN-PORT, ADDRESS, PROTOCOL
# NAME UP-PORT DOWN-PORT ADDRESS PROTOCOL
0 TTN V3 (eu1) 1700 1700 eu1.cloud.thethings.network UDP
1 local chirpstack 1700 1700 chirpstack.fritz.box UDP

[admin@lora1] /iot/lora/servers> /tool/ping chirpstack.fritz.box
SEQ HOST SIZE TTL TIME STATUS
0 192.168.XX.YY 56 64 890us
1 192.168.XX.YY 56 64 1ms52us
2 192.168.XX.YY 56 64 861us
3 192.168.XX.YY 56 64 848us
4 192.168.XX.YY 56 64 890us
sent=5 received=5 packet-loss=0% min-rtt=848us avg-rtt=908us max-rtt=1ms52us

In the Traffic tab I can see transmitted LORA packets, but they are _NOT_ forwarded to my chirpstack server or TTN - at least the gateway shows offline and I don't receive any packets.

To check if packets are sent out, I tried to run tcpdump on my chirpstack server and Packet Sniffer on KNOT filter for traffic on port 1700 (also tried IP). No packets were captured on either side, but when I tried ICMP (ping) with different filter I was able to validate tcpdum/packet sniffing.

In a forum post I found that time setting could cause a proble, but NTP is setup and and time is syncrhonized on my KNOT.

Is there anything more I can do for troubleshooting, or is there any known issue with current release code?

Thanks,
Robert

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