961 B
961 B
| type | status | source | tags | |||
|---|---|---|---|---|---|---|
| permanent | verified | manohargupta.com/journal/esp32-dht11-iot (2026-01-25) |
|
🌡️ IoT: ESP32 + DHT11 Monitoring
First full-stack IoT build — a home-office temperature/humidity monitor (~$10).
Hardware
- ESP32 — microcontroller with WiFi + Bluetooth
- DHT11 — affordable temp/humidity sensor
- Breadboard + jumper wires
Architecture
ESP32 (Arduino sketch, reads every 10s) → MQTT → Node.js backend (store) → React frontend (subscribes to MQTT topic, real-time display).
Lessons (his words)
- Microcontrollers are more accessible than expected
- MQTT is elegant for IoT comms
- Satisfying to see physical sensors drive web software
Next
Off-grid: a solar panel to power a fully sun-powered sensor setup → ties to Renewables Overview interest.