ESP8266 Community Forum

- Wed Jul 20, 2016 3:18 pm #51125 What is the SSID value ?
Because there are problems with special characters, like space character is not tolerated.

- Mon Jul 25, 2016 1:27 am #51461 I'm having this problem too, with an ESP-201. NodeMCU and other firmware works fine but with with esp8266/Arduino I just can't connect to any access point. I am using WPA2-Personal and alphanumeric SSIDs and passwords, with no spaces.

- Tue Sep 20, 2016 8:06 am #55419 The problem lies in the ESP8266WIFI library.
The latest version is not compatible with an earlier version of the same name.
After updating the libraries in the arduino IDE and re-compiling and uploading the code you will not be able to connect to your router without modifying your code. I'm afraid there is zero documentation on the change. Get an old copy of the ESP8266WIFI library and replace the folder with the same name in /users/%your username%/ AppData/Local/Arduino15/packages/ESP8266/hardware/esp8266/2.3.0/libraries
Note AppData is a hidden folder. You must make it visible from control panel / folder options / view
Keep the update option switched off in the Arduino IDE preferencies: 'check for update on startup' or it will happen again!
The old (working version) exists in the 2.2.0 ESP library set.

- Thu Sep 22, 2016 2:54 pm #55535 I had the same problem on several of my ESP8266's. But the same code would just work fine on another module. Seems the wifi on the module is not working like it should.
Have you tried another module ?