Tips:

• Include External *.h libary

• Wait for Serial port to connect
• Convert String to CharArray
• ESPxxx required driver 3.5.2019.1
• Redirect Page (webserver)
• PlatformIO: Change firmware name
• Create Debug Mode
• PlatformIO Serial Monitor Blank Fix
• GSM
• Blinking LED
• Detect ESP8266 Chipset and Pull-Up Pins
• Solar for ESP8266
• Sound for Passive Speaker