search

chirpstack / chirpstack-gateway-bridge

ChirpStack Gateway Bridge abstracts Packet Forwarder protocols into Protobuf or JSON over MQTT.
https://www.chirpstack.io
MIT License
423 stars 270 forks source link

Gateway KeepAlive is not communicated over mqtt #61

Closed Ankitjd18 closed 6 years ago

Ankitjd18 commented 6 years ago

Is this a bug or a feature request?

Bug (I guess) - I don't know if it should be created here or in Lora-app-server

What did you expect?

To receive each keep alive or communication message through gateway bridge

What happened?

For some time packets were not appearing on mqtt but communicating through gateway bridge

What version are your using?

2.1.5

How can your issue be reproduced?

No idea

Could you share your log output?

Lora-gateway-bridge log output - it's working fine but no message when subscribing to mqtt for sometimes (recieving packets at random time not all the time) time="2017-10-13T09:10:41Z" level=info msg="gateway: sending udp packet to gateway" addr=14.102.105.90:56640 protocol_version=1 type=PullACK time="2017-10-13T09:10:51Z" level=info msg="gateway: received udp packet from gateway" addr=14.102.105.90:56640 protocol_version=1 type=PullData time="2017-10-13T09:10:51Z" level=info msg="gateway: sending udp packet to gateway" addr=14.102.105.90:56640 protocol_version=1 type=PullACK time="2017-10-13T09:11:01Z" level=info msg="gateway: received udp packet from gateway" addr=14.102.105.90:56640 protocol_version=1 type=PullData time="2017-10-13T09:11:01Z" level=info msg="gateway: sending udp packet to gateway" addr=14.102.105.90:56640 protocol_version=1 type=PullACK time="2017-10-13T09:11:11Z" level=info msg="gateway: received udp packet from gateway" addr=14.102.105.90:56640 protocol_version=1 type=PullData time="2017-10-13T09:11:11Z" level=info msg="gateway: sending udp packet to gateway" addr=14.102.105.90:56640 protocol_version=1 type=PullACK

brocaar commented 6 years ago

Are you referring to the PULL_DATA packets received from the gateway? These are not forwarded over MQTT as the purpose is to keep firewalls open, not for communication with the network-server.

That packet type is used by the gateway to poll data from the server.

This data exchange is initialized by the gateway because it might be impossible for the server to send packets to the gateway if the gateway is behind a NAT.

When the gateway initialize the exchange, the network route towards the server will open and will allow for packets to flow both directions. The gateway must periodically send PULL_DATA packets to be sure the network route stays open for the server to be used at any time.

LoRa Gateway Bridge responds to these packets with a PULL_ACK.

Ankitjd18 commented 6 years ago

What are below mqtt topics for. I was looking for keep-alive messages sent by the gateway.

Messages on these come at a fixed interval specified for the keep-alive message, but not come for few minutes randomly.

brocaar commented 6 years ago

Please see: https://docs.loraserver.io/lora-gateway-bridge/use/data/.

Best topic would be the .../stats topic. You'll see data when your packet-forwarder is configured to send stats at every interval (e.g. every 30 seconds).

Ankitjd18 commented 6 years ago

I haven't listened anything on this topic from the beginning when subscribed with wild characters. Do I need to subscribe to this topic separately or something needs to be configured in the server? Also, when I do not receive any message on the topics mentioned earlier data also stops coming. No device is able to communicate through the gateway.

brocaar commented 6 years ago

I think https://forum.loraserver.io might be a better place to continue this discussion. I sense this has more to do with your gateway, networking and / or MQTT broker setup.

Ankitjd18 commented 6 years ago

Hey, I got confused in these. But, I have an issue that gateway does not respond for some time randomly, then it works after a restart. I tried to look for issues in logs but could not find anything. Do you have any idea about what might be causing such issue or is this something I may be doing wrong?

brocaar commented 6 years ago

As mentioned in my previous comment, I think https://forum.loraserver.io is a better place to find out what your issue is :-) Could you create a topic there, explaining your issue?

Ankitjd18 commented 6 years ago

Thanks for the help, I have created a topic - https://forum.loraserver.io/t/gateway-not-sending-data/240 to discuss this in the forum.