ESP-12E Development Board

Pinout

../_images/esp12e-pinout.jpg

ESP-12 pinout

../_images/esp12e-pinout.png

Flashing

  1. Connect 3.3 V to VCC and ground to GND.
  2. Attach the flash jumper (to the right in the picture).
  3. Turn on the power.
  4. Upload the software to Flash using esptool.
  5. The application starts automatically when the download is completed.

Hardware

  • 3.3 V power supply and logical level voltage.
  • Boot message at 76800 buad on a virgin board. Blue, red and RGB LEDs turned on.
  • 4 MB Flash.

How to determine the Flash size:

$ python esptool.py --port /dev/ttyUSB0 flash_id
Connecting...
head: 0 ;total: 0
erase size : 0
Manufacturer: e0
Device: 4016

Device 4016 gives a Flash of size 2 ^ (16 - 1) / 8 = 4096 kB = 4 MB.

Default system features

The default configuration includes those major features. They are all initialized by sys_start() at the startup of the application.

Library Reference

Read more about board specific functionality in the ESP-12E Development Board module documentation in the Library Reference.

Memory usage

Below is the memory usage of two applications:

  • The minimal-configuration application is configured to only include the bare minimum of functionality for the low level kernel to run. That is, the thread scheduler and system tick.
  • The default-configuration application is built with the default configuration, including a lot more functionality. See the list of Default system features above for a summary.
Application Flash RAM
minimal-configuration 277792 35688
default-configuration 324984 49252

Default configuration

Default Standard Library configuration.

Name Value
CONFIG_ADC 1
CONFIG_ANALOG_INPUT_PIN 1
CONFIG_ANALOG_OUTPUT_PIN 0
CONFIG_ASSERT 0
CONFIG_ASSERT_FORCE_FATAL 1
CONFIG_BMP280 1
CONFIG_BMP280_COVERTION_TIMEOUT_MS 50
CONFIG_BMP280_DEBUG_LOG_MASK -1
CONFIG_CAN 0
CONFIG_CAN_FRAME_TIMESTAMP 1
CONFIG_CHIPID 0
CONFIG_CRC_TABLE_LOOKUP 1
CONFIG_DAC 0
CONFIG_DEBUG 1
CONFIG_DHT 0
CONFIG_DS18B20 1
CONFIG_DS18B20_FS_COMMAND_LIST 1
CONFIG_DS3231 1
CONFIG_EEPROM_I2C 1
CONFIG_EEPROM_I2C_NUMBER_OF_ATTEMPTS 100
CONFIG_EEPROM_SOFT 1
CONFIG_EEPROM_SOFT_CRC CONFIG_EEPROM_SOFT_CRC_32
CONFIG_EEPROM_SOFT_CRC_32 0
CONFIG_EEPROM_SOFT_CRC_CCITT 1
CONFIG_EEPROM_SOFT_SEMAPHORE 1
CONFIG_EMACS_COLUMNS_MAX 80
CONFIG_EMACS_HEAP_SIZE 32768
CONFIG_EMACS_ROWS_MAX 24
CONFIG_ESP_WIFI 1
CONFIG_ESP_WIFI_FS_COMMAND_STATUS 1
CONFIG_EXTERNAL_OSCILLATOR_FREQUENCY_HZ 16000000
CONFIG_EXTI 1
CONFIG_FAT16 1
CONFIG_FATAL_ASSERT 1
CONFIG_FILESYSTEM_GENERIC 1
CONFIG_FLASH 1
CONFIG_FLASH_DEVICE_SEMAPHORE 1
CONFIG_FLOAT 1
CONFIG_FS_FS_COMMAND_APPEND 1
CONFIG_FS_FS_COMMAND_COUNTERS_LIST 1
CONFIG_FS_FS_COMMAND_COUNTERS_RESET 1
CONFIG_FS_FS_COMMAND_FILESYSTEMS_LIST 1
CONFIG_FS_FS_COMMAND_FORMAT 1
CONFIG_FS_FS_COMMAND_LIST 1
CONFIG_FS_FS_COMMAND_PARAMETERS_LIST 1
CONFIG_FS_FS_COMMAND_READ 1
CONFIG_FS_FS_COMMAND_REMOVE 1
CONFIG_FS_FS_COMMAND_WRITE 1
CONFIG_FS_PATH_MAX 64
CONFIG_GNSS 1
CONFIG_GNSS_DEBUG_LOG_MASK -1
CONFIG_HARNESS_EXPECT_BUFFER_SIZE 512
CONFIG_HARNESS_HEAP_MAX 2048
CONFIG_HARNESS_MOCK_VERBOSE 1
CONFIG_HARNESS_SLEEP_MS 300
CONFIG_HTTP_SERVER_REQUEST_BUFFER_SIZE 128
CONFIG_HTTP_SERVER_SSL 0
CONFIG_HX711 1
CONFIG_I2C 1
CONFIG_I2C_FS_COMMAND_READ 1
CONFIG_I2C_FS_COMMAND_SCAN 1
CONFIG_I2C_FS_COMMAND_WRITE 1
CONFIG_I2C_SOFT 1
CONFIG_LED_7SEG_HT16K33 1
CONFIG_LINUX_SOCKET_DEVICE 0
CONFIG_LOG_FS_COMMANDS 1
CONFIG_MCP2515 0
CONFIG_MODULE_INIT_ADC 1
CONFIG_MODULE_INIT_ANALOG_INPUT_PIN 1
CONFIG_MODULE_INIT_ANALOG_OUTPUT_PIN 0
CONFIG_MODULE_INIT_BUS 1
CONFIG_MODULE_INIT_CAN 0
CONFIG_MODULE_INIT_CHAN 1
CONFIG_MODULE_INIT_CHIPID 0
CONFIG_MODULE_INIT_DAC 0
CONFIG_MODULE_INIT_DS18B20 1
CONFIG_MODULE_INIT_DS3231 1
CONFIG_MODULE_INIT_ESP_WIFI 1
CONFIG_MODULE_INIT_EXTI 1
CONFIG_MODULE_INIT_FLASH 1
CONFIG_MODULE_INIT_FS 1
CONFIG_MODULE_INIT_I2C 1
CONFIG_MODULE_INIT_I2C_SOFT 1
CONFIG_MODULE_INIT_INET 1
CONFIG_MODULE_INIT_LOG 1
CONFIG_MODULE_INIT_MCP2515 0
CONFIG_MODULE_INIT_NETWORK_INTERFACE 1
CONFIG_MODULE_INIT_NRF24L01 0
CONFIG_MODULE_INIT_OWI 1
CONFIG_MODULE_INIT_PIN 1
CONFIG_MODULE_INIT_PING 1
CONFIG_MODULE_INIT_PWM 0
CONFIG_MODULE_INIT_PWM_SOFT 1
CONFIG_MODULE_INIT_RANDOM 1
CONFIG_MODULE_INIT_RE 1
CONFIG_MODULE_INIT_RWLOCK 1
CONFIG_MODULE_INIT_SD 0
CONFIG_MODULE_INIT_SEM 1
CONFIG_MODULE_INIT_SETTINGS 1
CONFIG_MODULE_INIT_SOCKET 1
CONFIG_MODULE_INIT_SPI 1
CONFIG_MODULE_INIT_SSL 0
CONFIG_MODULE_INIT_STD 1
CONFIG_MODULE_INIT_THRD 1
CONFIG_MODULE_INIT_TIMER 1
CONFIG_MODULE_INIT_UART 1
CONFIG_MODULE_INIT_UART_SOFT 1
CONFIG_MODULE_INIT_UPGRADE 0
CONFIG_MODULE_INIT_USB 0
CONFIG_MODULE_INIT_USB_DEVICE 0
CONFIG_MODULE_INIT_USB_HOST 0
CONFIG_MODULE_INIT_WATCHDOG 0
CONFIG_MONITOR_THREAD 0
CONFIG_MONITOR_THREAD_PERIOD_US 2000000
CONFIG_NETWORK_INTERFACE_FS_COMMAND_LIST 1
CONFIG_NRF24L01 0
CONFIG_NVM_EEPROM_SOFT 0
CONFIG_NVM_EEPROM_SOFT_BLOCK_0_SIZE 16384
CONFIG_NVM_EEPROM_SOFT_BLOCK_1_SIZE 16384
CONFIG_NVM_EEPROM_SOFT_CHUNK_SIZE (CONFIG_NVM_SIZE + 8)
CONFIG_NVM_EEPROM_SOFT_FLASH_DEVICE_INDEX 0
CONFIG_NVM_FS_COMMAND_READ 1
CONFIG_NVM_FS_COMMAND_WRITE 1
CONFIG_NVM_SIZE 2040
CONFIG_OWI 1
CONFIG_PANIC_ASSERT 1
CONFIG_PANIC_ASSERT_FILE_LINE 1
CONFIG_PCINT 0
CONFIG_PIN 1
CONFIG_PING_FS_COMMAND_PING 1
CONFIG_PIN_FS_COMMAND_READ 1
CONFIG_PIN_FS_COMMAND_SET_MODE 1
CONFIG_PIN_FS_COMMAND_WRITE 1
CONFIG_PREEMPTIVE_SCHEDULER 0
CONFIG_PROFILE_STACK 1
CONFIG_PWM 0
CONFIG_PWM_SOFT 1
CONFIG_RANDOM 1
CONFIG_RE_DEBUG_LOG_MASK -1
CONFIG_SD 0
CONFIG_SERVICE_FS_COMMAND_LIST 1
CONFIG_SERVICE_FS_COMMAND_START 1
CONFIG_SERVICE_FS_COMMAND_STOP 1
CONFIG_SETTINGS_AREA_SIZE 256
CONFIG_SETTINGS_BLOB 1
CONFIG_SETTINGS_FS_COMMAND_LIST 1
CONFIG_SETTINGS_FS_COMMAND_READ 1
CONFIG_SETTINGS_FS_COMMAND_RESET 1
CONFIG_SETTINGS_FS_COMMAND_WRITE 1
CONFIG_SHELL_COMMAND_MAX 64
CONFIG_SHELL_HISTORY_SIZE 768
CONFIG_SHELL_MINIMAL 0
CONFIG_SHELL_PROMPT “$ “
CONFIG_SHT3XD 1
CONFIG_SOAM_EMBEDDED_DATABASE 0
CONFIG_SOCKET_RAW 1
CONFIG_SOFTWARE_I2C 1
CONFIG_SPC5_BOOT_ENTRY_RCHW 1
CONFIG_SPC5_RAM_CLEAR_ALL 1
CONFIG_SPI 1
CONFIG_SPIFFS 1
CONFIG_START_CONSOLE CONFIG_START_CONSOLE_UART
CONFIG_START_CONSOLE_DEVICE_INDEX 0
CONFIG_START_CONSOLE_UART_BAUDRATE 76800
CONFIG_START_CONSOLE_UART_RX_BUFFER_SIZE 32
CONFIG_START_CONSOLE_USB_CDC_CONTROL_INTERFACE 0
CONFIG_START_CONSOLE_USB_CDC_ENDPOINT_IN 2
CONFIG_START_CONSOLE_USB_CDC_ENDPOINT_OUT 3
CONFIG_START_CONSOLE_USB_CDC_WAIT_FOR_CONNETION 1
CONFIG_START_FILESYSTEM 1
CONFIG_START_FILESYSTEM_ADDRESS 0x00300000
CONFIG_START_FILESYSTEM_FAT16 0
CONFIG_START_FILESYSTEM_SIZE 0xFB000
CONFIG_START_FILESYSTEM_SPIFFS 1
CONFIG_START_NETWORK 0
CONFIG_START_NETWORK_INTERFACE_WIFI_CONNECT_TIMEOUT 30
CONFIG_START_NETWORK_INTERFACE_WIFI_PASSWORD MyWiFiPassword
CONFIG_START_NETWORK_INTERFACE_WIFI_SSID MyWiFiSSID
CONFIG_START_NVM 1
CONFIG_START_SHELL 1
CONFIG_START_SHELL_PRIO 30
CONFIG_START_SHELL_STACK_SIZE 1536
CONFIG_START_SOAM 0
CONFIG_START_SOAM_PRIO 30
CONFIG_START_SOAM_STACK_SIZE 1536
CONFIG_STD_OUTPUT_BUFFER_MAX 16
CONFIG_SYSTEM_INTERRUPTS 1
CONFIG_SYSTEM_INTERRUPT_STACK_SIZE 0
CONFIG_SYSTEM_TICK_FREQUENCY 100
CONFIG_SYSTEM_TICK_SOFTWARE 1
CONFIG_SYS_CONFIG_STRING 1
CONFIG_SYS_FS_COMMANDS 1
CONFIG_SYS_LOG_MASK LOG_UPTO(INFO)
CONFIG_SYS_MEASURE_INTERRUPT_LOAD 1
CONFIG_SYS_PANIC_KICK_WATCHDOG 0
CONFIG_SYS_RESET_CAUSE 1
CONFIG_SYS_SIMBA_MAIN_STACK_MAX 4096
CONFIG_THRD_CPU_USAGE 1
CONFIG_THRD_DEFAULT_LOG_MASK LOG_UPTO(INFO)
CONFIG_THRD_ENV 1
CONFIG_THRD_FS_COMMANDS 1
CONFIG_THRD_IDLE_STACK_SIZE 768
CONFIG_THRD_MONITOR_STACK_SIZE 768
CONFIG_THRD_SCHEDULED 1
CONFIG_THRD_STACK_HEAP 0
CONFIG_THRD_STACK_HEAP_SIZE 0
CONFIG_THRD_TERMINATE 1
CONFIG_TIME_UNIX_TIME_TO_DATE 1
CONFIG_UART 1
CONFIG_UART_FS_COUNTERS 1
CONFIG_UART_SOFT 1
CONFIG_UPGRADE_FS_COMMAND_APPLICATION_ENTER 1
CONFIG_UPGRADE_FS_COMMAND_APPLICATION_ERASE 1
CONFIG_UPGRADE_FS_COMMAND_APPLICATION_IS_VALID 1
CONFIG_UPGRADE_FS_COMMAND_BOOTLOADER_ENTER 1
CONFIG_USB 0
CONFIG_USB_DEVICE 0
CONFIG_USB_DEVICE_FS_COMMAND_LIST 1
CONFIG_USB_DEVICE_PID 0x8037
CONFIG_USB_DEVICE_VID 0x2341
CONFIG_USB_HOST 0
CONFIG_USB_HOST_FS_COMMAND_LIST 1
CONFIG_WATCHDOG 0
CONFIG_WS2812 0
CONFIG_XBEE 1
CONFIG_XBEE_CLIENT 1
CONFIG_XBEE_CLIENT_DEBUG_LOG_MASK -1
CONFIG_XBEE_CLIENT_RESPONSE_TIMEOUT_MS 1000
CONFIG_XBEE_DATA_MAX 120

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