ESP8266 Community Forum

Hi, may I know anyone have this problem before ?

Error downloading http://arduino.esp8266.com/st…/package_esp8266com_index.json

And out of sudden no ESP8266 boards available to choose in the board drop-down menu.

I am using Arduino IDE 1.8.3, at the Additional Boards Manager URLs: http://arduino.esp8266.com/st…/package_esp8266com_index.json

At the bottom of the IDE, the warning message:
http://downloads.arduino.cc/packages/package_index.json file signature verification failed. File ignored.

I have uninstall and re-install back the Arduino IDE, still same problem.

Kindly advice how to fix the above problem.

Thank you.
Best regards.
Kam

Take a look here and see if it helps. Read all the way through...
https://github.com/arduino/Arduino/issues/5188

You might want to get the source directly from git-master (so disable the entire URL for the boards manager).

Since the last official releasea lot of nice features have be added and bugs have been fixed.