ESP-IDF Pre-release v3.1-rc2

Documentation for release v3.1-rc2 is available at http://docs.espressif.com/projects/esp-idf/en/v3.1-rc2/.

This is a pre-release release candidate version. The current release version is v3.0.3.

This is the list of changes since v3.1 Release Candidate 1:

Build System

• Initial Experimental CMake support added (alternative to the default GNU Make build system which is the same as previous versions.)

WiFi

• Reorder MPDU as AMPDU (fixes situation where AP alternates between sending each type)
• Fix for scanning during connect process
• Add check for beacon length in modem sleep
• Fix for SoftAP sometimes deauthing wrong station when inactivity timer expires
• Fix the system assert when receiving empty MCS in association response frame

Bluetooth

• Fix a probable memory leak for BTA_GATTS_CONF_EVT event
• Fix for BT timer oneshot mode sometimes triggering twice
• Check support of AFH in remote slave device's LM feature when determine whether to send LMP_set_AFH
• Fix memory leak in security server
• BLE: Fix get incorrect adv packet sometimes
• Fix incorrect computation of PCM data buffer size in A2DP sink

LWIP

• Backport LWIP timer implementation from LWIP v2.0.3

Drivers

• SPI driver: Fix issue that SPI cannot be used when flash is disabled.

For the list of changes since earlier releases, see v3.1 Release Candidate 1.