This post takes an experimental approach by collecting metrics on response time and packet size when sending identical payload through MQTT and HTTP, and by the variation of payload size and number of messages over one connection session. By examining the performance characteristics of each of these two protocols, you can make an informed decision on which is more helpful to your particular use case. Google Cloud IoT Core currently supports device to cloud communication through two protocols: HTTP and MQTT. More specifically, you often need to efficiently offload data from the devices into the cloud, which eventually requires you to evaluate different communication protocols. When it comes to making software design decisions for Internet of Things (IoT) devices, it’s important to fit your functional requirements within the capabilities of resource-constrained devices.
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