esp8266/tools/sdk/changelog.txt

esp_iot_sdk_v1.0.1_15_05_04_p1
-------------------------------------------
Here is a patch for station+softAP issue that users may have, based on SDK_v1.0.1, 
solved problem that connect to ESP8266 softAP may fail in station+softAP mode.

Sorry for the inconvenience.

esp_iot_sdk_v1.0.1_15_04_24 Release Note 
-------------------------------------------

Resolved Issues(Bugs below are eligible for Bug Bounty Program):
1. SSL connection may fail if SSL packet size larger than 2kBytes [PeteW ] 
2. UDP remote IP to be 0.0.0.0 may cause reset [Jerry S] 
3. Optimize wifi_get_ip_info to fix loss of wireless connectivity problem 
4. Air-Kiss restart [Orgmar] 

Optimization:
1. Optimized IOT_Espressif_EspTouch.APK (apply for access from Espressif) for improved compatibility. [???] 
2. TCP server can not open again immediately with the same port [624908539] 
3. Update UART driver for parity bit value may be incorrect [1062583993] 
4. Add define of “ICACHE_RODATA_ATTR” for Symbol 'ICACHE_RODATA_ATTR' could not be resolved. [???] 
5. Add API wifi_softap_dhcps_set_offer_option to enable/disable ESP8266 softAP DHCP server default gateway. [xyz769] 
6. AT register_uart_rx_intr may enter callback twice. [???] 
7.optimize document that WPA password length range : 8 ~ 64 bytes [785057041] 
8. ESP8266 softAP DHCP server record 8 DHCP client's IP at most [ygjeon] 
9. To set static IP (wifi_set_ip_info) has to disable DHCP first(wifi_softap_dhcps_stop or wifi_station_dhcpc_stop) 
10.Add example of wifi_softap_set_dhcps_lease
11. smartconfig_start can only be called in ESP8266 station mode 

Added APIs: 
1. Wi-Fi related APIs: 
wifi_station_set_reconnect_policy: enable/disable reconnect when ESP8266 disconnect from router,default to be enable reconnect. 
wifi_set_event_handler_cb: set event handler of ESP8266 softAP or station status change. 
wifi_softap_dhcps_set_offer_option: enable/disable get router information from ESP8266 softAP, default to be enable. 
2. SNTP APIs: 
sntp_get_current_timestamp: get current timestamp from Jan 01, 1970, 00:00 (GMT) 
sntp_get_real_time: char,get real time (GTM + 8 time zone) 
sntp_init: initialize SNTP 
sntp_stop: stop SNTP 
sntp_setserver: set SNTP server by IP 
sntp_getserver: get SNTP server IP 
sntp_setservername: set SNTP server by domain name 
sntp_getservername: get domain name of SNTP server set by sntp_setservername 
3. MDNS APIs: 
espconn_mdns_init: initialize mDNS 
espconn_mdns_close: close mDNS 
espconn_mdns_server_register: register mDNS server 
espconn_mdns_server_unregister: unregister mDNS server 
espconn_mdns_get_servername: get mDNS server name 
espconn_mdns_set_servername: set mDNS server name 
espconn_mdns_set_hostname: get mDNS host name 
espconn_mdns_get_hostname: set mDNS host name 
espconn_mdns_disable: disable mDNS 
espconn_mdns_enable: endisable mDNS 

AT_v0.23 Release Note: 
Optimized: 
1.AT+CWJAP add parameter "bssid", for several APs may have the same SSID 

New AT commands: 
1. AT+CIPSENDBUF: write data into TCP-send-buffer; non-blocking. Background task automatically handles transmission. Has much higher throughput. 
2. AT+CIPBUFRESET: resets segment count in TCP-send-buffer 
3. AT+CIPBUFSTATUS: checks status of TCP-send-buffer 
4. AT+CIPCHECKSEGID: checks if a specific segment in TCP-send-buffer has sent successfully 



esp_iot_sdk_v1.0.1_b2_15_04_10 release note
-------------------------------------------

Fix bugs:
1.Call espconn_sent to send UDP packet in user_init cause reset.[BBP#2 reporter (????)] 
2.UART & FlowControl issue: send data to FIFO without CTS flag will cause WDT [BBP#11 reporter (pvxx)]
3.SSL issue,add an API (espconn_secure_set_size) to set SSL buffer size [BBP#29 reporter (PeteW)]
4.UDP broadcast issue in WEP

Optimize:
1.Add more details about measure ADC & VDD3P3 in appendix of document“2C-SDK-Espressif IoT SDK Programming Guide”[BBP#15 reporter (DarkByte)]
2.Can not do any WiFi related operation if WiFi mode is in NULL_MODE [BBP#23 reporter (hao.wang)]
3.start_ip and end_ip won't change through API wifi_softap_set_dhcps_lease [BBP#37 reporter (glb)]
4.AT get into busy state [BBP#35 reporter (tommy_hk)]
5.ssid + password length limitation when using AirKiss [BBP#45 reporter (zhchbin)]

Add APIs:
1.espconn_secure_set_size:set buffer size for SSL packet
2.espconn_secure_get_size:get SSL buffer size
3.at_register_uart_rx_intr:set UART0 to be used by user or AT commands

Add AT command:
1.AT+SLEEP: set ESP8266 sleep mode

esp_iot_sdk_v1.0.1_b1_15_04_02 Release note
-------------------------------------------

Fix bugs:
1. Connect to ESP8266 softAP fail after SmartConfig;
2. SmartConfig loses one bit of SSID

Optimize:
1. espconn_set_opt: set configuration of TCP connection,add parameter for TCP keep-alive

Add APIs:
1. espconn_clear_opt: clear configuration of TCP connection
2. espconn_set_keepalive: set configuration of TCP keep-alive to detect if TCP connection broke
3. espconn_get_keepalive: get configuration of TCP keep-alive

AT_v0.23_b1 release note
Note: AT added some functions so flash size need to be 1024KB or more than that.

Fix bug:
1. Always "busy" if TCP connection abnormally broke during AT+CIPSEND

Optimize:
1. Add UDP transparent transmission
2. Optimize the initial value of AT+CWDHCP?
3. Add TCP keep-alive function in AT+CIPSTART

Add AT command:
1. Add AT+CIPSENDEX which support quit from sending mode by "\0" (so an useful "\0" need to be "\\0")

esp_iot_sdk_v1.0.0_15_03_20 Release Note
----------------------------------------

Optimize:
1. Optimize smartconfig to version v1.0; Please don't call any other APIs during SmartConfig.
2. Optimize AT to version 0.22.0.0;
3. Optimize the protection of system parameters, and add error-check about it;
4. Optimize beacon delay of ESP8266 softAP;
5. Optimize boot to version 1.3(b3);
   - Add API system_restart_enhance: for factory test, support to load and run program in any specific address;
   - Add APIs to get boot version and start address of current user bin;
   - Fix compatibility problem of dual flash;
6. Optimize sniffer, structure sniffer_buf changed, please refer to document;
7. Optimize espconn;
8. Optimize pwm;
9. Other optimize to make the software more reliable;

Add APIs:
1. system_update_cpu_freq: change CPU frequency;
2. wifi_promiscuous_set_mac: set a mac address filter during sniffer;
3. wifi_set_broadcast_if : set which interface will UDP broadcast send from;

Fix bugs:
1. Interrupt during flash erasing will cause wdt reset;
2. Read/write rtc memory;
3. If router disconnect to ESP8266, ESP8266 won't reconnect;
4. Connect to router which hid its SSID

AT_v0.22 release note

Fix bug:
1. Wrong return value of AT+CIPSTATUS;
2. wdt rest after "0,CONNECT FAIL";

Add AT commands:
1. Change AT commands of which configuration will store into flash to two kinds:
   XXX_CUR: current, only set configuration won't save it into Flash;
   XXX_DEF: default, set configuration and save it to Flash
2. Add SmartConfig in AT:
   AT+CWSTARTSMART/AT+CWSTOPSMART: start / stop SmartConfig
   Notice: please refer to the document, call  "AT+CWSTOPSMART" to stop SmartConfig first since "AT+CWSTARTSMART", then call other AT commands. Don't call any other AT commands during SmartConfig. 
2. AT+SAVETRANSLINK: save transparent transmission link to Flash;
   Note:AT+CIPMODE=1 set to enter transparent transmission mode, won't save to Flash.


Add AT APIs
1. at_customLinkMax: set the max link that allowed, most can be 10; if you want to set it, please set it before at_init; if you didn't set it, the max link allowed is 5 by default. 
2. at_enter_special_state/ at_leave_special_state:Enter/leave AT processing state. In processing state, AT core will return "busy" for any further AT commands. 
3. at_set_custom_info:set custom version information of AT which can be got by AT+GMR;
4. at_get_version:get version information of AT lib .

Optimize
1. Add UDP remote ip and remote port is allowed to be parameters of "AT+CIPSEND"
2. Move "AT+CIUPDATE" from lib to AT "demo\esp_iot_sdk\examples\at", AT demo shows how to upgrade AT firmware from a local server. Notice that AT upgrade the bin files name have to be "user1.bin" and "user2.bin".
3. Optimize "AT+CIPSTA", add gateway and netmask as parameters 
4. Optimize transparent transmission.

esp_iot_sdk_v0.9.5_15_01_22 Release Note
----------------------------------------

AT becomes a lib attached to esp_iot_sdk, programming guide in "document" shows APIs for user to define their own AT commands, AT bin files are in \esp_iot_sdk\bin\at

Fix bugs:
1. Incorrect status got by API : wifi_station_get_connect_status;
2. Sniffer can not quit without restart;
3. wifi_station_ap_change always return true;
4. TCP connection issues

Add APIs:
1. system_deep_sleep_set_option: set what the chip will do when deep-sleep wake up;
2. wifi_status_led_uninstall;
3. wifi_station_ap_get_info: get information of AP that ESP8266 station connected.
4. wifi_station_dhcpc_status & wifi_softap_dhcps_status : get DHCP status
5. smart config APIs, more details in documents.
6. add beacon_interval parameter in struct softap_config
7. espconn_recv_hold and espconn_recv_unhold to block TCP receiving data and unblock it.
8. AT APIs to let user define their own AT, more details in documents.

Optimize:
1. light sleep, modem sleep, deep sleep
2. compile method: ./gen_misc.sh, then follow the tips and steps.
3. when no buffer for os_malloc, return NULL instead of malloc assert.
4. users can enable #define USE_OPTIMIZE_PRINTF in user_config.h to remove strings of os_printf from ram to irom
5. faster the re-connection of ESP8266 station to router after deep-sleep.
6. update to boot v1.2 to support new format user.bin;
7. update ARP
8. update SSL
9. revised system_deep_sleep,system_deep_sleep(0),set no wake up timer,connect a GPIO to pin RST, the chip will wake up by a falling-edge on pin RST 

esp_iot_sdk_v0.9.4_14_12_19 Release Note
----------------------------------------

1. Update sniffer to support capture HT20/HT40 packet;
2. Add APIs to set and get sleep type;
3. Add APIs to get version info of sdk, delete version.h;
4. RAW in LWIP is open source now, add API of function ping;
5. Update spi driver;
6. Optimize APIs related to espconn;
7. Fix some bugs to make the software more reliable;

Known Issue:
1. exception of small probability occured while recving multi-client data in softap
2. restart of small probability occured while tcp client reconnecting

So sorry that we have some known issues here, we will solve it ASAP.

esp_iot_sdk_v0.9.3_14_11_21 Release Note
----------------------------------------

1. Add license documentation of ESPRESSIF SDK
2. Add APIs to read and write RTC memory, and APIs to get RTC time.
3. Add APIs to swap UART0
4. Add API to read ADC, delete adc.c.
5. Add API to read spi flash id
6. Revise struct station_config, add bssid parameters to distinguish different AP with same ssid ;
   Note: if station_config.bssid_set == 1 , station_config.bssid has to be set, or connection will fail. So in general, station_config.bssid_set need to be 0.
7. Revise struct scan_config, add scan_config.show_hidden to set whether scan APs which ssid is hidden or not; not scan, set scan_config.show_hidden to be 0.
   Add bss_info.is_hidden in struct bss_info to show if this APTs ssid is hidden.
8. Revise struct softap_config, add softap_config.ssid_len. If softap_config.ssid_len == 0, check ssid till find a termination characters; otherwise it depends on softap_config.ssid_len.
9. Revise API "wifi_softap_set_config" to take effect immediately, needs not restart to make the configuration enable any more.
10. Add APIs to set and get physical layer mode(802.11b/g/n)
11. Add APIs to enable and disable DHCP server of ESP8266 softAP
12. Add APIs to enable and disable DHCP client of ESP8266 station
13. Add API to set range of ip address that get from DHCP server
14. Add APIs to set and get how many TCP connections allowed at max.
15. Add APIs to set and get how many TCP clients allowed at max to a TCP server.
16. Revise "wifi_set_ip_info" and "wifi_set_macaddr" to take effect immediately.
17. Fix some bugs to make the software more reliable.

ESP8266EX: Fix A Potential Error For UART RX in esp_iot_sdk_v0.9.2_14_10_24
---------------------------------------------------------------------------

The previously released SDK for ESP8266EX inadvertently introduced a bug that may cause a little packet loss when transferring packet by Uart RX.
So for now,I will release the patch for this bug.Please download the patch from the attachment,and refer to the following steps:
Following Commands:
1. REPLACE LIBPHY.A IN SDK/LIB
2. ADD LIBPP.A TO SDK/LIB
3. MODIFY SDK/APP/MAKEFILE
4. ADD "-lpp \" AS BELOW
-lgcc
-lhal
-lpp
-lphy
-lnet80211
-llwip
-lwpa
-lmain
-lssc
-lssl

esp_iot_sdk_v0.9.2_14_10_24 Release Note
----------------------------------------

Initial version for public, can be compiled on both windows and lubuntu.