board manager will not list Generic ESP8266 module on IDE 1.8.3

board manager will not list Generic ESP8266 module on IDE 1.8.3 File, Preferences, Settings, Additional Board Manager URL contains http://arduino.esp8266.com/stable/package_exp8266com_index.json So what could be wrong ?

Please try this:

  • Tools > Board > Boards Manager
  • Wait for downloads to complete
  • Scroll down until you see the "esp8266 by ESP8266 Community" entry. Click on it.
  • Click "Install".
  • Wait for installation to complete.
  • Click "Close"

The ESP8266 boards should now show up in the Tools > Board menu