Using ESP8266 as an IoT Endpoint with Encrypted MQTT Transport A while back, I purchased a few SparkFun Thing Dev boards (featuring the venerable ESP8266 WiFi chipset) and SparkFun Beefcake Relays with a plan to use them in a cloud-free IoT setup. After some investigation, I settled on using the MQTT protocol as a lightweight way to send and receive messages between my Linux server and any number of IoT endpoints throughout my house.
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