Bump fists over the internet with someone #ESP32 #MQTT #Arduino
Michael Ang set up a fist bump machine, which can be triggered remotely over a simple web page.
It’s amazing how much just a tiny amount of physical touch does for providing a sense of physical connection.
The communications uses MQTT, a lightweight protocol for connecting to small devices. The machine is controlled by an ESP32 microcontroller running Arduino code with a small servo. The Arduino connects to an MQTT server (I’m using shiftr.io) and receives messages that are sent from a web page to the MQTT server. The latency is very low – send a fist bump and the motor moves within milliseconds.
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