Upload this script to a new ESP8266 to gather the information on the hardware and WiFi connection. The script starts a webserver. Open the webpage with your browser. Also a MQTT message is sent to devices/newboard and devices/
The script also runs the OTA (Over-The-Air) service, which enables you to replace the code with your own code over-the-air.
To use: Add your SSID and password in a secrets.h file (example available) or change the main.cpp