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Azure/azure-iot-protocol-gateway: Azure IoT protocol gateway enables protocol translation for Azure IoT Hub @GitHub
"Azure IoT protocol gateway is a framework for protocol adaptation that enables bi-directional communication with Azure IoT Hub. It is a pass-through component that bridges traffic between connected IoT devices and IoT Hub. The protocol gateway can be deployed in Azure using Cloud Services worker roles. It can also be deployed in on-premises environments.
The Azure IoT protocol gateway provides a programming model for building custom protocol adapters for variety of protocols. It includes an MQTT protocol adapter to demonstrate the concepts and to enable customizations of the MQTT v3.1.1 protocol. "