MCUs are ideal MQTT clients because the protocol is lightweight and designed for low-bandwidth, low-RAM environments.
The project itself is very simple: getting push notifications via MQTT when a wireless doorbell sounds. But as [Robin Reiter] points out, as the “Hello, world!” program is a time-honored tradition for ...
Despite its small form factor, the Raspberry Pi is a highly capable system you can grab for well under $100. Depending on your interests, it can double as anything between an emulation system, stream ...
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