- ESPAsyncWebServer
- SPIFFs
- Adafruit_MQTT_Library
- Enter Bootloader by Hold Boot -> Hold Reset -> Release Reset - > Release Boot.
- Upload Filesystem Image Using Platformio.
- Flash Firmware.
- Exit Bootloader by Pressing Reset.
- To build and upload filesystem image (SPIFF): Platformio Extension -> "Build Filesystem Image" -> "Upload Filesystem Image"