How to make IoT from dumb device using raspberry and "tambourine"
summary
A Raspberry Pi runs Linux and a Kotlin/Java service using Pi4J wrapper + Undertow REST to read a single-wire DHT sensor, toggle relays for fan and humidifier, and expose a Telegram bot and OpenHAB feed. Hardware hacks include reading two status LEDs, emulating a capacitive button by applying a weak voltage to the spring, and using optocouplers for isolation between device and Pi. DHT timing needs a 500 ms init and a 7,000-iteration timeout; reads fail ~1–2 in 10 but the system overall works.
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chapters (8)
- 0:00Introduction
- 3:47Raspberry Pi vs Arduino
- 7:05Connecting devices to Pi
- 14:44Java pin programming
- 23:51Temperature sensor work
- 26:57System demo
- 31:58Telegram and OpenHAB integration
- 40:14Summary and Q&A
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