The “Password Protected Web Server” eBook is no longer available for purchase. You can get the newer version of the course: Home Automation Using ESP8266 (3rd Edition).
Learn ESP32 with Arduino IDE
Low Power Weather Station Datalogger using ESP8266 and BME280 with MicroPython
How to Create .bin (binary) Files from Sketch on Arduino IDE
Power ESP8266 with Mains Voltage using Hi-Link HLK-PM03 Converter
ESP32 Over-the-air (OTA) Programming – Web Updater Arduino IDE