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IBM Bluemix - IBM IOT out node configuration for Arduino example

I have the IBM tutorial on using Arduino+Bluemix, up and running. I would now like to take a decision on the cloud and let the Arduino subscribe to a topic containing the decision message. For this, I am trying to use the IBM IOT out node in my Node-RED editor. However, I am not sure of how to configure this node.

Are there any tutorials that cover this use-case (IBM IOT out node + Arduino, MQTT)- or documentation on the node properties?

Thanks. NK

Solution

  • This is the picture of an IoT output node I'm using on the Coursera IoT course, works for me sending data to the Sense HAT device plugged onto my pi.

    At the client side I'm using NodeRED (using a Pi this is easy :-) and an IoT input node which does the subscription to the command.

    The docs describe how to subscribe to commands HERE under the heading Subscribing to Commands.

    The subscription topic should look like iot-2/cmd/[command_id]/fmt/[format_string], so for my pi to subscribe to the command in the picture the topic should be iot-2/cmd/display/fmt/json - although I haven't tried that myself, it should work.

    enter image description here