Sense and Sensibility
summary
Rails back end handles real sensors: a ThingSpeak (Rails) instance accepts HTTP posts with a 16‑char API key, creates channel/feed records and plots CSV/JSON outputs; demos use an STM32 switch and a proximity ultrasonic node (battery life measured in weeks to a month), and an esp8266 <$3 temperature node publishing to a local Mosquitto broker. Wireless costs: Wi‑Fi dev kits <$20, cellular modules ~$70–80. The MQTT publish/subscribe flow shows live updates and WebSocket dashboards and the Rails controllers create feeds reliably. MQTT publish/subscribe channels, feeds, API key
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chapters (16)
- 0:00Introduction
- 2:01Sensors
- 3:52Internet of Things
- 5:49Demos
- 8:22First Example
- 10:21Amazon Dash
- 11:02Forum
- 15:48Rails Structure
- 17:07Application
- 18:02Platforms
- 18:53Standards
- 19:24MQTT
- 21:22ESP8266
- 22:44MQTT Protocol
- 23:43Applications
- 24:42Conclusion
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