Data OpenStream API Quickstart
This guide will walk you through how to subscribe your devices' messages as well as how to send a command to a specific device, using Eclipse Mosquitto’s CLIs to subscribe or publish messages.
Setup
Install or download Mosquitto.
Credentials
Browse https://sensecap.seeed.cc, navigate to "User -> Organization -> Secret Credentials", create a full access "Access Key", set down it as <Password>
, and also "Organization ID" as <OrgID>
.
Receive Devices' Messages
Let’s listen for all of your devices' messages.
Open a terminal window and execute the following command.
mosquitto_sub \
-h openstream.api.sensecap.seeed.cc \
-t '/device_sensor_data/<OrgID>/+/+/+/+' \
-u 'org-<OrgID>' \
-P '<Password>' \
-I 'org-<OrgID>-quickstart' \
-v
You should replace <OrgID>
and <Password>
with the ones you set down from "Credentials".
2. Power up devices, while devices keep sending messages, you should see outputs like:
/device_sensor_data/xxxx/2CF7F12XXXXXXXXX/1/2CF7F13XXXXXXXXX/4105 {"value":0,"timestamp":1544151824139}
/device_sensor_data/xxxx/2CF7F12XXXXXXXXX/1/2CF7F13XXXXXXXXX/4097 {"value":23,"timestamp":1544151900992}
/device_sensor_data/xxxx/2CF7F12XXXXXXXXX/1/2CF7F13XXXXXXXXX/4101 {"value":101629,"timestamp":1544151901112}
/device_sensor_data/xxxx/2CF7F12XXXXXXXXX/1/2CF7F13XXXXXXXXX/4098 {"value":71,"timestamp":1544151900992}
/device_sensor_data/xxxx/2CF7F12XXXXXXXXX/1/2CF7F13XXXXXXXXX/4099 {"value":69.12,"timestamp":1544151902224}
/device_sensor_data/xxxx/2CF7F12XXXXXXXXX/1/2CF7F13XXXXXXXXX/4100 {"value":437,"timestamp":1544151922137}
It shows each data collected by sensors, with Device EUI
, Device Channel
, Sensor EUI
, Measurement ID
, Measurement Value
, and timestamp
, see the reference for more details.
Subscribe a Specific Field
You can also subscribe a specific field in the topic, so that you could get the data from a single device, or a single channel.
mosquitto_sub \
-h openstream.api.sensecap.seeed.cc \
-t '/device_sensor_data/<OrgID>/2CF7F12XXXXXXXXX/#' \
-u 'org-<OrgID>' \
-P '<Password>' \
-I 'org-<OrgID>-quickstart' \
-v
You should replace <OrgId>
and <Password>
with what you got from "Credentials", and replace 2CF7F12XXXXXXXXX
with the Device EUI
you own.
🎉 Congratulations! Now you know how to monitor and receive messages via MQTT. Go build something awesome!
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