netFIELD direct Methods MQTT publisher example

This example code shows how to create a Edge based application which publishes sample data to a MQTT Bus and how to utilize Microsoft direct Methods to communicate through an API to this container to change values.

This method will register the direct methods on the the EdgeHub. Use the api.netfield.io API POST /devices/{deviceId}/methods in this way In this sample the parameter "input1" is used to set the target temperature

{
  "containerName": "netfield-app-sample-multi-arch",
  "methodName": "SetTargetTemperature",
  "methodPayload": {
    "temperature": "180",
    "unit": "centigrade"
  }
}

Build and publish your Docker image

adjust your dockerfile accordingly

Login to Docker sudo docker login

arm

Build your docker image docker build -t 'your-registry-uri/your-registry':netfied-device-sample-arm32-0.3.0

Push your docker image to your registry docker push 'your-registry-uri/your-registry':netfied-device-sample-arm32-0.3.0

x86

Build your docker image docker build -t 'your-registry-uri/your-registry':netfied-device-sample-x86-0.3.0

Push your docker image to your registry (arm) docker push 'your-registry-uri/your-registry':netfied-device-sample-x86-0.3.0

multi-arch

vi ~/.docker/config.json
add option: "experimental": "enabled"

docker manifest create 'your-registry-uri/your-registry':netfield-app-sample-multi-arch 'your-registry-uri/your-registry':netfield-app-sample-x86-0.3.0 'your-registry-uri/your-registry':netfield-app-sample-arm32-0.2.0 --amend

docker manifest annotate 'your-registry-uri/your-registry':netfield-app-sample-multi-arch 'your-registry-uri/your-registry':netfield-app-sample-arm32-0.3.0 --os linux --arch arm

docker manifest push 'your-registry-uri/your-registry':netfield-app-sample-multi-arch --purge

You my use the file node-red_direct-method_SetTargetTemperature_sample WO credentials.txt in a Node-Red to test your installation.