Building Wireless Sensors
summary
Five Wi‑Fi sensors send temperature, humidity and a solar light reading to a broker and time‑series DB; hardware choices are concrete: ESP8266 for $2–$15, DHT22 sensors every 5 minutes (2s sensor latency), or the pricier MKR1000/Particle Photon for SSL and OTA. Data flows via MQTT (Mosquitto) into InfluxDB and Chronograf for rollups; five deployed nodes work reliably on mains power (battery deep‑sleep proved flaky), and passive solar data shows the slab holding temperature so the furnace stays off.
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chapters (12)
- 0:00Introduction to wireless sensors
- 3:51XBee mesh network setup
- 6:59Raspberry Pi and Arduino alternatives
- 8:00ESP8266 microcontroller overview
- 11:29Arduino programming basics
- 13:54Storing sensor data online
- 19:31MQTT for sensor data
- 23:42Enterprise IoT platforms
- 25:08Particle platform for remote updates
- 29:23Time series database for trends
- 35:02Future sensor projects
- 36:10Q&A on battery life and efficiency
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