Based on: https://github.com/deantonious/esp8266WeatherMonitor
weather.php.txt
espweather.ino.txt
Create ibay esp8266 (HTTP only; not HTTPS)
Add domain esp8266.coeleveld.com and point it to ibay esp8266
Add DNS A record for domain coeleveld.com for esp8266 pointing to server IP.
db accounts setprop esp8266 AllowUrlfOpen enabled
signal-event ibay-modify esp8266
Register for API key at https://openweathermap.org
Enter API key in weather.php file
Place weather.php in ibay.
Enter WiFi details and city in espweather.ino
Program espweather.ino into Heltec Wifi 8.