ESP32 Forum

Full details, release notes, download instructions and links can be found on GitHub:
https://github.com/espressif/esp-idf/releases/tag/v3.1

Major Changes

• Wi-Fi and Bluetooth modem sleep support
• Wi-Fi and Bluetooth coexistence support
• Bluetooth Hands Free Profile (HFP)
• Bluetooth Serial Port Profile (SPP)
• Bluetooth A2DP source support
• Automatic Light Sleep feature to reduce overall power consumption (including Tickless FreeRTOS). Average current in Wi-Fi Station mode, when connected to AP (DTIM=1) is 3.1mA. This is 10x lower than the average current in modem sleep mode under the same scenario (30mA).
• Multiple antenna support (automatic using external RF antenna switch)
• Wi-Fi mesh functionality (ESP-MESH)
  • Autonomous self-organizing Wi-Fi-based networking protocol
  • Self-healing mesh topology
  • Can connect to external IP network via a "root node" and route packets to external network
  • Supports mesh network data encryption via WPA2-PSK
• OS adapter layer for Wi-Fi functionality (allows Wi-Fi libraries to run on other RTOS implementations)
• SDIO Slave peripheral driver
• Bootloader refactoring, configurable factory reset and test app trigger functionality
• Partition table can be relocated to allow a larger bootloader binary
• esp_https_ota: New simplified HTTPS OTA client feature
• Initial Experimental support for alternative CMake build system.