I am just adding documentation to the c2e "tour" adding a new connection to Hono in Ditto
Do I understand correctly that with the credentials
consumer@HONO:verysecret I can authenticate at AMQP 1.0 (according to the "example-permissions-json" in the c2e package) and am able to consume data of all tenants which are created?
Hi,
i am following the 'Tour' section in order to test the c2e package that i just deployed (thanks for the recent update).
I'm able to publish telemetry data, but it doesn't seem to impact on the twin property value that i am trying to update.
This is how i created the twin:curl -X PUT -u ditto:ditto -H 'Content-Type: application/json' --data '{
"policyId": "org.movasim:test-policy",
"attributes": {
"location": "Argentina"
},
"features": {
"temperature": {
"properties": {
"value": null
}
},
"humidity": {
"properties": {
"value": null
}
}
}
}' http://${DITTO_API_IP}:${$DITTO_API_PORT_HTTP/api/2/things/org.movasim:test-device
This is how i publish telemetry data:curl -i -u my-auth-id-1@test-tenant:my-password -H 'application/json' --data-binary '{
"topic": "test-tenant/org.movasim:test-device/things/twin/commands/modify",
"headers": {},
"path": "/features/temperature/properties/value",
"value": 45
}' http://${HTTP_ADAPTER_IP}
This returns 200 OK.
This is how i retrieve the twin state:curl -u ditto:ditto -w '\n' http://$DITTO_API_IP:$DITTO_API_PORT_HTTP/api/2/things/org.movasim:test-device
But the temperature property remains null.
The connection between Hono and Ditto was created exactly as indicated in the ''Create a new connection from Ditto to Hono" section.
We are at the testing phase, but if we get good results (which I believe we will achieve, based on current progress), my company is interested in being more involved in these Eclipse projects, so any advice will be very much appreciated.
Seems like something with ruby gem bundle installation is broken: https://ci.eclipse.org/packages/job/Website/job/master/28/console
But I fear I have no clue how to solve that
@ctron do you have an idea?
I try to apply the mentioned workaround from there
https://hub.docker.com/r/hamelsmu/fastpages-jekyll
@sophokles73 absolutely, that sounds great! Thanks.
We recently finished replacing our cloud service with cloud2edge. We used the Java SDK to consume the twins data on the application backend, and we did an end to end test with the physical devices we are working with (RFID readers), and worked flawlessly.
Right now our gateway allow us to send the devices metrics to Hono via MQTT, HTTP or AMQP indefferently. Is there any relevant difference between any of those protocols why we should prioritize one over another to send the metrics to Hono?
Hello,
finally we had to switch to MQTT because the gateway i was talking about supports only AMQP 0.9.1.
Talking a little bit more about the use case:
We have RFID sensors that report to the gateway when an RFID tag was detected (i.e an object enters an area). This gateway sends the reports to Hono.
In order to keep track of the object (an RFID tag), we have a Java back-end that receives the reports, process them and generates the actual state of the objects (i.e time in zone, in time, out time, alarms, etc). This back-end uses the Ditto SDK to interact with Ditto (at the moment is subscribed only to twin features updates, in the future maybe we will send commands to the twins). At the moment we are adapting it to delegate the access management to Keycloak.
Finally, a front-end developed in React interacts with the back-end in order to show the final user all this information (how many objects are in a zone, track an object, set alarms for an object, etc.) and let him create alarms, generate reports and some other functionalities.
With all that said, what we did so far in C2E was (excluding the tenant, policies, and connection between Hono and Ditto creation):
- Create a device (and the twin) that represents the gateway
- Create a user to connect to Ditto and retrieve the twin features (this user is the back-end)
It would be great to hear your opinion about what we are doing, to know if we are getting all this right, and if this architecture has some potential problems we are not seeing or we are not using all the features that C2E offers.
Hi, i hope you are doing well.
I am getting the following error from the Hono MQTT adapter:
org.eclipse.hono.client.ServerErrorException: no credit availableA couple of days ago everything was working well, so i am a little confused about this.
What should i be looking at in order to find the cause?