v3.0

Major Changes

SDK

• Memory optimization: iram can be used as memory, thus saving about 17KB memory for user application.

AT

• Update AT's version to 1.7.0.0.
• Limited by the size of the AT bin files, only 1024+1024 flash map is supported by default. Therefore, please choose 16Mbit/32Mbit-C1 flash size when flashing these AT bin files with Espressif's Flash Download Tools.

New Features and Optimizations

SDK

• Add partition table to manage flash partition, more details are in documents/CN/Partition Table 说明.md or documents/EN/Partition Table.md.
  • system_partition_table_regist
  • system_partition_get_ota_partition_size
  • system_partition_get_item
• Add WiFi APIs to set sleep level of modem sleep and light sleep.
  • wifi_set_sleep_level
  • wifi_get_sleep_level
  • wifi_set_listen_interval
  • wifi_get_listen_interval
• Add signalling measurement feature
  • wifi_enable_signaling_measurement
  • wifi_disable_signaling_measurement
• Support random DHCP transaction id
• Add libhal.a for the new compiler

AT

• Add command AT+SYSMSG_DEF and AT+SYSMSG_CUR to instead of AT+SYSMSG.
• Add AT+CIPCLOSEMODE to select TCP close mode.
• Add a parameter in AT+CWJAP_CUR and AT+CWJAP_DEF to disable the connection to open/wep router
• Add AT+CIPRECVLEN to get the length of received data in passive receiving mode.
• Add AT+CIPRECVMODE to set TCP receive mode.
• Add commands to configure SSL client authentication
  • AT+CIPSSLCCONF?
  • AT+CIPSSLCCONF=<ssl_mode>
• Replace ssl with mbedtls in AT
• Make SmartConfig optional, users can disable it in application for smaller bin size and more memory.
• Disable AT+RFAUTOTRACE command.

Bug Fix

SDK

• Fix issue that system crashes when calling os_printf_plus in interrupt handler.
• fix issue that mbedtls cannot set the fragment to be 2048.
• fix issue that OTA may crash with some server.
• Fix issue that beacon info does not update after wifi_station_scan.
• Fix softAP compatibility issue.
• Fix issue that fails to scan hidden AP in station mode.

AT

• Fix issue that GPIO related commands always return OK even without GPIO number.
• Fix issue that extra 0x0A displayed in SNTP time string