COSM MQTT subscribe does not receive update status whenever the feed or datastream is updated

Question

I'm testing the MQTT with COSM.

To publish data, I use below command:

$ mosquitto_pub -h api.cosm.com -u <COSM_API_KEY> -t /v2/feeds/96951.csv -m "temp_sensor,21"

To subscribe, I use below command:

$ mosquitto_sub -h api.cosm.com -u <COSM_API_KEY> -t /v2/feeds/96951/datastreams/temp_sensor.csv

I expect in subscribe side, it should get the update status whenever the feed or datastream is updated. But I only get the current state of the device immediately upon subscription.

Did I miss anything?

This looks like it could be an issue with Cosm and not a mistake on your end. I'd email Cosm's support. — lebreeze, Apr 17 '13 at 16:08

score 2 · Answer 1 · answered Apr 18 '13 at 15:30

2

I think this was fixed on the Cosm end, so the mosquitto_sub example you gave above is working for me now.

answered Apr 18 '13 at 15:30

smulube

91
3

Thanks for let me know that. I just tried again, and I can see the value change in mosquitto_sub side. – user2291509 Apr 19 '13 at 01:57

COSM MQTT subscribe does not receive update status whenever the feed or datastream is updated

1 Answers1