iothubmqtt

Shows two ways of connecting to IOT Hub directly over MQTT.
A practical adaptation of the guidelines here: https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-mqtt-support

Pre-requisites:

1. Install Azure CLI https://docs.microsoft.com/en-us/cli/azure/install-azure-cli?view=azure-cli-latest
2. Install IOT Extensions for Azure CLI
   az extension add --name azure-cli-iot-ext

X509 Cert

1. Create a device identity with a self-signed cert that is valid for 10 days using
   az iot hub device-identity create -n <hubname> -d <deviceid> --am x509_thumbprint --valid-days 10 --od .
   This will generate two files <deviceid>-cert.pem and <deviceid>-key.pem in the current folder
2. Modify iothubcert.py by setting:
   device_id=<deviceid>
iot_hub_name=<hubname>
   
3. Run iothubcert.py. It should connect and send one message to IOT Hub over MQTT.

SAS

1. Create a device identity with a SAS Token:
   az iot hub generate-sas-token -d <deviceid> -n <hubname>
   The token is the entire returned value, i.e.
   SharedAccessSignature sig={signature-string}&se={expiry}&sr={URL-encoded-resourceURI}
2. Modify iothubsas.py by setting:
   device_id=<deviceid>
iot_hub_name=<hubname>
sas_token=<value of sas token generated in step 1>
   
3. Run iothubsas.py. It should connect and send one message to IOT Hub over MQTT.