From software side all the basic functionality works now:

• SDS011/LCD/DHT22 drivers are functional
• OTA flashing is working
• Wifi AP mode for configuration
• simple HTTP configuration panel allowing changing WIFI configuration, ThingSpeak API key, etc.
• ThinkSpeak data upload

Things left to be done:

• Setting configuration for multiple wifis
• Scanning available WIFI networks in settings panel
• firmware upload using HTTP panel
• sensor data aggregation in case of network failure
• code cleanups