*Note:

When developing new products with ESP8266, it is recommended that you use ESP8266 AT Bin V2.0.0.0 and/or later versions. Previous AT versions were based on the ESP8266 NONOS SDK, to which no new features will be added in the future. ESP8266 AT Bin V2.0.0.0 and/or later versions will be developed according to the ESP8266 RTOS SDK, which will continue being updated.

Version Description:
1. Update AT version to 1.6.0.0;

2. Add a new command `AT+SYSMSG` to enable some report information;

3. Add a new command `AT+CWCOUNTRY`;

    - `AT+CWCOUNTRY=<country_policy>,"country_code",<start_channel>,<total_channel_number>`

4. Add new command `AT+CIPSERVERMAXCONN`;

    - `AT+CIPSERVERMAXCONN=<num>`

5. Update command `AT+CWLAP`;

    - `AT+CWLAP =<ssid>[,<mac>,<ch>,<scan_type>,<scan_time_min>,<scan_time_max>]`

6. Update command `AT+CWLAPOPT`;

    - Mask changes from 0x7F to 0x7FF

7. Optimize tcp server by using new `espconn_recv`;

8. Fix an issue that getting error irom string when print messages after upgrade;

9. Fix an issue that baudrate is not correctly set when it was set at 1,200;

10. Fix an issue that it should return error if the link id is wrong;

11. Fix an issue that DNS auto mode is used by default;

12. Fix a wrong link id issue when client connection number reaches maximum;

13. Fix an issue that error will be reported when the maximun connection number is more than 5;

14. Fix the message is incorrect when creating UDP if ip is a domain name;

15. Fix GSLP too long time error;

16. Fix that `AT+CIPSTART` causes busy if the server is connected at the same time;