Each of the linked above ESP-AT-Bin files contains several binaries for some specific functions, and the factory/factory/xxx.bin is the combination of all binaries. So user can only download the factory/factory_xxx.bin to address 0, or several binaries to different addresses according to ESP-AT-Bin/download.config.
at_customize.bin is to provide a user partition table, which lists different partitions for the ble_data.bin, SSL certificates, and factory_param_XXX.bin. Furthermore, users can add their own users partitions, and read/write the user partitions with the command AT+FS and AT+SYSFLASH.
factory_param_XXX.bin indicates the hardware configurations for different ESP modules (see the table below). Please make sure the correct bin is used for your specific module. If users design their own module, they can configure it with reference to the esp-at/docs/en/Compile_and_Develop/How_to_create_factory_parameter_bin.md, and the binaries will be automatically generated after compilation. When users flash the firmware into module according to the download.config, the customized_partitions/factory_param.bin should be replaced with the actual module-specific customized_partitions/factory_param_XXX.bin. UART CTS and RTS pins are optional.
ESP32 Series
Modules
UART Pins (TX, RX, CTS, RTS)
Factory Parameter Bin
ESP32-WROOM-32 Series (ESP32 Default Value)
GPIO17, GPIO16, GPIO15, GPIO14
factory_param_WROOM-32.bin
ESP32-WROVER Series (Supports Classic Bluetooth)
GPIO22, GPIO19, GPIO15, GPIO14
factory_param_WROVER-32.bin
ESP32-PICO Series
GPIO22, GPIO19, GPIO15, GPIO14
factory_param_PICO-D4.bin
ESP32-SOLO Series
GPIO17, GPIO16, GPIO15, GPIO14
factory_param_SOLO-1.bin
ESP32S2 Series
Modules
UART Pins (TX, RX, CTS, RTS)
Factory Parameter Bin
ESP32S2-WROOM Series
GPIO17, GPIO21, GPIO20, GPIO19
factory_param_WROOM.bin
ESP32S2-WROVER Series
GPIO17, GPIO21, GPIO20, GPIO19
factory_param_WROVER.bin
ESP32S2-SOLO Series
GPIO17, GPIO21, GPIO20, GPIO19
factory_param_SOLO.bin
ESP32S2-MINI Series
GPIO17, GPIO21, GPIO20, GPIO19
factory_param_MINI.bin
ESP32-C3 Series
Modules
UART Pins (TX, RX, CTS, RTS)
Factory Parameter Bin
ESP32-C3-MINI Series
GPIO7, GPIO6, GPIO5, GPIO4
factory_param_MINI-1.bin
ESP8266 Series
Modules
UART Pins (TX, RX, CTS, RTS)
Factory Parameter Bin
ESP-WROOM-02 Series (ESP8266 Default Value)
GPIO15, GPIO13, GPIO3, GPIO1
factory_param_WROOM-02.bin
ble_data.bin is to provide BLE services when the ESP32 works as a BLE server;
server_cert.bin, server_key.bin and server_ca.bin are examples of SSL server‘s certificate;
client_cert.bin, client_key.bin and client_ca.bin are examples of SSL client‘s certificate.
If some of the functions are not used, then the corresponding binaries need not to be downloaded into flash.
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