Send Data to the Cloud (Workers/ThingsBoard)
REST/MQTT ingestion patterns.
馃摎 Home
SPIFFS/LittleFS: Read/Write JSON
Store config as JSON in FS.
Timers & Ticker: Schedule Sensor Reads
Use non-blocking timers to read sensor every minute.
Topic Design, QoS, and LWT
Design MQTT topics, choose QoS, use LWT.
Troubleshooting WiFi/MQTT: Checklist
Common pitfalls and fixes.
Unit Testing with PlatformIO
Write tests and run `pio test`.
Watchdog (WDT) & Safe Boot
Use task watchdog and avoid lockups.
WebSocket Realtime Updates
Push sensor data to browser via WebSocket.
Setting up PlatformIO & Arduino IDE for ESP32
Install VS Code+PlatformIO or Arduino IDE 2.x with ESP32 board support.
Introduction to ESP32 & Its Ecosystem
What ESP32 is, how it differs from ESP8266, and which board to start with.