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Title Body Platform Version Release Datesort descending Download
ESP8266 NONOS SDK V1.5.3.3 Patch_20160704

ESP8266_NONOS_SDK_V1.5.3.3_ Patch is based on the ESP8266_NONOS_SDK_V1.5.3 and contains all changes updated within ESP8266_NONOS_SDK_V1.5.3.1 and ESP8266_NONOS_SDK_V1.5.3.2. When this patch is used, .a files in this patch shall replace corresponding files under the SDK/lib Folder.

Updated:

1. Resolved the issue that API system_adc_read may return wrong value. (Resolved in 1.5.3.1)
2. Resolved the issue that the current in light sleep mode is too high. (Resolved in 1.5.3.1)
3. Optimised igmp to resolve the issue that ESP8266 maybe reset if connected to a special router. (Resolved in 1.5.3.1)
4. Resolved an issue that RF_Init_data sector may be broken in stress test. Provided a function “user_rf_cal_sector_set” which has to be added in application by software developer. More details about user_rf_cal_sector_set refer to documentation “2C-ESP8266__SDK__API Guide”.(Resolved in ESP8266_NONOS_SDK_V1.5.3.2) 
5. Fix a potential risk that will cause rf not work after external reset.(Resolved in ESP8266_NONOS_SDK_V1.5.3.3)
6. Modify 112 byte of esp_init_data_default.bin, 0x03->0x00, turn off auto freq correction.(Resolved in ESP8266_NONOS_SDK_V1.5.3.3)
Attention: Please refer to “user_main.c” in the zip for “user_rf_cal_sector_set” sample code.

ESP8266_NONOS_SDK Note:

1. esp_init_data.bin has to be downloaded into flash at least once.
2. Download blank.bin to initialize the sector stored RF_CAL parameter (set by user_rf_cal_sector_set), and download esp_init_data.bin into flash, when the system needs to be initialized, or RF needs to be calibrated again.

NON-OS SDK V1.5.3.3 2016.07.04
ESP8266 NONOS SDK V1.5.2.1 Patch_20160704

This patch is based on the ESP8266_NONOS_SDK_V1.5.2. When this patch is used, .a files in this patch shall replace corresponding files under the SDK/lib Folder.

Updated:

1. Resolved an issue that RF_Init_data sector may be broken in stress test. Provided a function “user_rf_cal_sector_set” which has to be added in application by software developer. More details about user_rf_cal_sector_set refer to documentation “2C-ESP8266__SDK__API Guide”.(Resolved in ESP8266_NONOS_SDK_V1.5.2.1) 
2. Fix a potential risk that will cause rf not work after external reset.(Resolved in ESP8266_NONOS_SDK_V1.5.2.1)
3. Modify 112 byte of esp_init_data_default.bin, 0x03->0x00, turn off auto freq correction.(Resolved in ESP8266_NONOS_SDK_V1.5.2.1)
Attention: Please refer to “user_main.c” in the zip for “user_rf_cal_sector_set” sample code.

ESP8266_NONOS_SDK Note:

1. esp_init_data.bin has to be downloaded into flash at least once.
2. Download blank.bin to initialize the sector stored RF_CAL parameter (set by user_rf_cal_sector_set), and download esp_init_data.bin into flash, when the system needs to be initialized, or RF needs to be calibrated again.
NON-OS SDK V1.5.2.1 2016.07.04
ESP8266 NONOS SDK V1.5.4.1 Patch_20160704

This patch is based on the ESP8266_NONOS_SDK_V1.5.4. When this patch is used, .a files in this patch shall replace corresponding files under the SDK/lib Folder.

Updated:

1. Resolved an issue that RF_Init_data sector may be broken in stress test. Provided a function “user_rf_cal_sector_set” which has to be added in application by software developer. More details about user_rf_cal_sector_set refer to documentation “2C-ESP8266__SDK__API Guide”. (Resolved in ESP8266_NONOS_SDK_V1.5.4.1) 
2. Fix a potential risk that will cause rf not work after external reset. (Resolved in ESP8266_NONOS_SDK_V1.5.4.1)
3. Fix system state mismatch when call some cur and def APIs. (Resolved in ESP8266_NONOS_SDK_V1.5.4.1)
4. Add SDIO AT support. (Resolved in ESP8266_NONOS_SDK_V1.5.4.1)
5. Fix a potential bug in espconn. (Resolved in ESP8266_NONOS_SDK_V1.5.4.1)
6. Modify 112 byte of esp_init_data_default.bin, 0x03->0x00, turn off auto freq correction.(Resolved in ESP8266_NONOS_SDK_V1.5.4.1)
Attention: Please refer to “user_main.c” in the zip for “user_rf_cal_sector_set” sample code.

ESP8266_NONOS_SDK Note:

1. esp_init_data.bin has to be downloaded into flash at least once.
2. Download blank.bin to initialize the sector stored RF_CAL parameter (set by user_rf_cal_sector_set), and download esp_init_data.bin into flash, when the system needs to be initialized, or RF needs to be calibrated again.
NON-OS SDK V1.5.4.1 2016.07.04
ESP8266 RTOS SDK v1.3.3 Patch_20160704

This patch is based on the ESP8266_RTOS_SDK_V1.3.0(68c9e7b4) and contains all changes updated within ESP8266_RTOS_SDK_V1.3.1(095c975c) and ESP8266_RTOS_SDK_V1.3.2(86e315aa). When this patch is used, .a files in this patch shall replace corresponding files under the SDK/lib Folder.

Updated:

1. Fix station leave issue in softap mode.(Resolved in ESP8266_RTOS_SDK_V1.3.1)
2. Resolved an issue that RF_Init_data sector may be broken in stress test. Provided a function “user_rf_cal_sector_set” which has to be added in application by software developer. More details about user_rf_cal_sector_set refer to documentation “2C-ESP8266__SDK__API Guide”.(Resolved in ESP8266_RTOS_SDK_V1.3.2) 
3. Fix a potential risk that will cause rf not work after external reset.(Resolved in ESP8266_RTOS_SDK_V1.3.3)
4. Modify 112 byte of esp_init_data_default.bin, 0x03->0x00, turn off auto freq correction.(Resolved in ESP8266_RTOS_SDK_V1.3.3)
Attention: Please refer to “user_main.c” in the zip for “user_rf_cal_sector_set” sample code.

ESP8266_RTOS_SDK Note:

1. esp_init_data.bin has to be downloaded into flash at least once.
2. Download blank.bin to initialize the sector stored RF_CAL parameter (set by user_rf_cal_sector_set), and download esp_init_data.bin into flash, when the system needs to be initialized, or RF needs to be calibrated again.
RTOS SDK V1.3.3 2016.07.04
ESP8266 NONOS SDK MBEDTLS 20160718

Features

1. Supports TLS 1.0, TLS 1.1, TLS 1.2, doesn’t support SSL 3.0.
2. TLS cache of 2048 to 8192 bytes.
3. Supports  AES-128 and AES-256 encryption algorithm, and CBC mode.
4. Supports SHA-1, SHA-256, SHA-384 and SHA-512 hash algorithm.
5. Supports RSA-512, RSA-1024, RSA-2048 algorithm.
6. Supports certificates in PEM format and DER format.
7. Supports both unidirectional authentication and bidirectional authentication.
8. Supports three-tier certificate chain parsing.
9. Doesn’t support verify three-tier certificate chain with root certificate.

Usage

1. For ESP8266_NONOS_SDK versions older than 2.0.0, copy include, ld and lib folders in the directory of ESP8266_NONOS_SDK_EMBEDTLS to SDK root directory. For version 2.0.0 and later, only the lib folder needs to be copied.
2. “-lssl” in Makefile of user’s project directory should be modified into “-lmbedtls” if the user has utilized libssl.a before. There is no need to modify any user code.
3. mbedtls_demo includes source code of mbedtls, espconn_secure_xxxx APIs and a simple example.
3.1. Copy the entire folder of mbedtls_demoto the SDK root directory.
3.2. Find and run "./make_lib.sh mbedtls" in mbedtls_demo directory. Source code of mbedtls will be automatically compiled and generate libmbedtls.a which will be copied to SDK/lib directory.
3.3. Test firmware of mbedtls_demo can be generated via ./gen_misc.sh.
NON-OS SDK MBEDTLS 2016.07.17
ESP-NOW User Guide

This document introduces the ESP-NOW technology developed by Espressif. The document focuses on ESP-NOW features, their uses and the demo code.

PDF V1.0 2016.07.20
Simple-Pair User Guide

This document introduces the Simple-Pair technology developed by Espressif. The document focuses on Simple-Pair features, their uses and the demo code.

PDF V1.0 2016.07.20
ESP8266 NONOS SDK V2.0.0 patch 20160809

ESP8266_NONOS_SDK_V2.0.0_patch release notes

This patch is based on ESP8266_NONOS_SDK_V2.0.0. While using it, users should use .a file in the package to overwrite the corresponding files subject to SDK/lib directory.

The updates are as follows:

1. Slow connection problems in some cases have been solved.

2. Provided an interface to enable automatic calibration of frequency offset: void system_phy_freq_trace_enable(bool enable); By default, the automatic calibration of frequency offset is off. To enable it, this function should be called in user_rf_pre_init(). Its parameter is true.

Note:

Users should confirm that only when ambient temperature is higher than the normal operating temperature range that crystal oscillator requires does this function need to be enabled. In general,  this function is not recommended to be enabled if ambient temperature is lower than 80 ℃.

NON-OS SDK V2.0.0 2016.08.08
ESP8266 NONOS SDK V2.0.0 20160810

ESP8266_NONOS_SDK_V2.0.0_16_08_10 Release Notes

1. Changed the license of some source files to espressif MIT.
2. Updated libphy.a to 1055, fixed an issue of large current in Light-sleep.
3. Updated AT+ to 1.3.0:
   3.1 Added Light-sleep wakeup command, AT+WAKEUPGPIO;
   3.2 Fixed abnormal AT+CWDHCPS IP allocation;
   3.3 Added at_sdio demo under example directory.
4. Fixed probable system default when calling cur and def interfaces.
5. Fixed the issue of high current in Deep-sleep mode without disabling SPI first.
6. Fixed an issue where the SDK would crash when switching from AP to Station mode by calling wifi_set_phy_mode.
7. Updated secondary boot loader to v1.6:
   7.1 Supports AT + based on SDIO;
   7.2 Supports entering testing mode through GPIO.
8. Added support for MXIC Flash QIO mode.
9. Fixed exception caused during TCP handshake and retransmission.
10. Fixed issues in ESP-NOW.
11. Added ESP-PAIR (Simple-Pair) feature, for APIs please refer to ESP8266 SDK API Guide.
12. wpa2-enterprise time function derivation and time check disable can be set by users.
13. Support for PEAP/TTLS in wpa2-enterprise, for APIs please refer to ESP8266 SDK API Guide.
14. Added mqtt demos under examples directory.
15. Other issue fixes.
16. Resolved an issue that RF_Init_data sector may be broken in stress test. Provided a function user_rf_cal_sector_set which has to be added in application by software developer. More details about user_rf_cal_sector_set refer to documentation "2C-ESP8266__SDK__API Guide". (Resolved in ESP8266_NONOS_SDK_V1.5.4.1) 
17. Fix a potential risk that will cause rf not work after external reset. (Resolved in ESP8266_NONOS_SDK_V1.5.4.1)
18. Add SDIO AT support. (Resolved in ESP8266_NONOS_SDK_V1.5.4.1)
19. Fix a potential bug in espconn. (Resolved in ESP8266_NONOS_SDK_V1.5.4.1)

ESP8266_NONOS_SDK Notes:

1. esp_init_data.bin has to be downloaded into flash at least once.
2. Download blank.bin to initialize the sector stored RF_CAL parameter (set by user_rf_cal_sector_set), and download esp_init_data.bin into flash, when the system needs to be initialized, or RF needs to be calibrated again.

AT Notes:

1. Since the release of ESP8266_NONOS_SDK_V1.5.0, AT firmware is too large to use 4Mbit flash. Please choose flash with at least 8Mbit capacity. 
2. Firmware upgrade over-the-air process is changed a bit. We will upgrade the latest AT firmware to Espressif Cloud server only after it has been tested and the overall performance is guaranteed.Users may not be able to use AT+CIUPDATE in ESP8266_NONOS_SDK_V1.5.0 and other more advanced versions.
NON-OS SDK V2.0.0 2016.08.10
ESP8266 FOTA Guide

This document explains how to upgrade ESP8266 firmware over Espressif Cloud through Wi-Fi.

PDF V1.7 2016.08.26
ESP8266 Non-OS SDK IoT_Demo Guide

This document is the ESP8266 Non-OS SDK IoT Demo Guide.

PDF V1.4 2016.08.30
ESP8266 Ping Test Demonstration

This guide is intended to help users run ping test on the ESP8266 easily and quickly. It demonstrates the testing of network connectivity by running ping test in Station mode or SoftAP mode of ESP8266. The ping test has been demonstrated and run on the ESP-Launcher. However, with appropriate build settings, the test can be made to run on any ESP8266-based system.

ZIP V1.0 2016.09.27
ESP8266 Low Power Test Demonstration

This guide is intended to help implement and test the available low power modes and observe the resulting current consumption of the ESP8266 easily and quickly. It demonstrates the Modem-sleep mode, Light-sleep mode, and Deep-sleep mode.

ZIP V1.0 2016.09.29
ESP-Launcher Data Send and Receive Operation Power Consumption Tests

The power consumption of the ESP8266 depends on the PHY mode employed for sending or receiving data. In power critical applications, it is important to balance the average or burst data transfer rate as well as overall power consumption of the system.This test demonstration is intended to demonstrate the results of various power consumption tests on the ESP8266. Based on this guide, users can choose the appropriate PHY mode and data transmission scheme for their application.

ZIP V1.0 2016.10.10
TCP/UDP UART Passthrough Test Demonstration

The UART passthrough mode has been provided with the AT firmware to facilitate sending of data blocks of large size and for continuous transmission of small packets of data. In the passthrough mode, the data sent by the main application processor is directly forwarded to the target networking device via a TCP or UDP connection. Here, the ESP8266 AT firmware handles the networking tasks involved. This guide is intended to help users run TCP & UDP passthrough test on the ESP8266 IOT Platform quickly to evaluate the feature with various networking configurations of the ESP8266.

ZIP V1.0 2016.10.10

More information on GitHub

Development projects are freely distributed under Espressif's MIT license on GitHub.