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 electronut.in
Talking to Ultrasonic Distance Sensor HC-SR04 using an ATtiny84 - Electronut Labs
| | darrenparkinson.uk
Ultrasonic Intruder Alarm - Darren Parkinson
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| | Using the HC-SR04 on a Raspberry Pi with Go
| | peterbraden.co.uk
ESP32 Air sensors
47.6 parsecs away

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| [AI summary] The author details the process of building an ESP32-based air sensor that measures temperature and humidity, sends data via MQTT to a home server for visualization in Home Assistant, and discusses challenges faced during development.