Espressif 8266¶

CPU Frequency¶

See board_build.f_cpu option from “platformio.ini” (Project Configuration File)

[env:myenv]
; set frequency to 160MHz
board_build.f_cpu = 160000000L

FLASH Frequency¶

Please use board_build.f_flash option from “platformio.ini” (Project Configuration File) to change a value. Possible values:

• 20000000L

• 26000000L

• 40000000L (default)

• 80000000L

[env:myenv]
; set frequency to 80MHz
board_build.f_flash = 80000000L

FLASH Mode¶

Flash chip interface mode. This parameter is stored in the binary image header, along with the flash size and flash frequency. The ROM bootloader in the ESP chip uses the value of these parameters in order to know how to talk to the flash chip.

Please use board_build.flash_mode option from “platformio.ini” (Project Configuration File) to change a value. Possible values:

• qio

• qout

• dio

• dout

[env:myenv]
board_build.flash_mode = qio

Reset Method¶

You can set custom reset method using upload_resetmethod option from “platformio.ini” (Project Configuration File).

The possible values are:

• ck - RTS controls RESET or CH_PD, DTR controls GPIO0

• wifio - TXD controls GPIO0 via PNP transistor and DTR controls RESET via a capacitor

• nodemcu - GPIO0 and RESET controlled using two NPN transistors as in NodeMCU devkit.

See default reset methods per board.

[env:myenv]
upload_resetmethod = ck

Flash Size¶

Available LD-scripts: https://github.com/esp8266/Arduino/tree/master/tools/sdk/ld

Please open eagle.flash.***.ld file to check how flash is split.

To override default LD script please use build_flags from “platformio.ini” (Project Configuration File).

[env:myenv]
build_flags = -Wl,-Teagle.flash.4m.ld

Upload Speed¶

You can set custom upload speed using upload_speed option from “platformio.ini” (Project Configuration File)

[env:myenv]
upload_speed = 9600

lwIP Variant¶

Available variants (macros):

• -D PIO_FRAMEWORK_ARDUINO_LWIP2_LOW_MEMORY v2 Lower Memory (default)

• -D PIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH v2 Higher Bandwidth

• -D PIO_FRAMEWORK_ARDUINO_LWIP2_LOW_MEMORY_LOW_FLASH v2 Lower Memory (no features)

• -D PIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH_LOW_FLASH v2 Higher Bandwidth (no features)

• -D PIO_FRAMEWORK_ARDUINO_LWIP2_IPV6_LOW_MEMORY v2 IPv6 Lower Memory

• -D PIO_FRAMEWORK_ARDUINO_LWIP2_IPV6_HIGHER_BANDWIDTH v2 IPv6 Higher Bandwidth

• -D PIO_FRAMEWORK_ARDUINO_LWIP_HIGHER_BANDWIDTH v1.4 Higher Bandwidth

You can change lwIP Variant passing a custom macro using project build_flags.

For example, switch to lwIP v1.4

[env:myenv]
...
build_flags = -D PIO_FRAMEWORK_ARDUINO_LWIP_HIGHER_BANDWIDTH

SSL Support¶

By default, all SSL ciphers (most compatible) are supported.

You can control SSL support passing a custom macro using project build_flags.

For example, use basic SSL ciphers (lower ROM use):

[env:myenv]
...
build_flags = -D BEARSSL_SSL_BASIC

Serial Debug¶

Please use the next build_flags to enable Serial debug:

[env:myenv]
...
build_flags = -DDEBUG_ESP_PORT=Serial

; or for Serial1
build_flags = -DDEBUG_ESP_PORT=Serial1

Debug Level¶

Please use one of the next build_flags to change debug level. A build_flags option could be used only the one time per build environment. If you need to specify more flags, please separate them with a new line or space.

Also, please note that you will need to extend build_flags with Serial Debug macro. For example, build_flags = -DDEBUG_ESP_PORT=Serial -DDEBUG_ESP_SSL ....

Actual information is available in Arduino for ESP8266 Board Manifest. Please scroll to generic.menu.lvl section.

[env:myenv]
platform = ...
board = ...
framework = arduino

;;;;; Possible options ;;;;;;

; SSL
build_flags = -DDEBUG_ESP_SSL

; TLS_MEM
build_flags = -DDEBUG_ESP_TLS_MEM

; HTTP_CLIENT
build_flags = -DDEBUG_ESP_HTTP_CLIENT

; HTTP_SERVER
build_flags = -DDEBUG_ESP_HTTP_SERVER

; SSL+TLS_MEM
build_flags =
  -DDEBUG_ESP_SSL
  -DDEBUG_ESP_TLS_MEM

; SSL+HTTP_CLIENT
build_flags =
  -DDEBUG_ESP_SSL
  -DDEBUG_ESP_HTTP_CLIENT

; SSL+HTTP_SERVER
build_flags =
  -DDEBUG_ESP_SSL
  -DDEBUG_ESP_HTTP_SERVER

; TLS_MEM+HTTP_CLIENT
build_flags =
  -DDEBUG_ESP_TLS_MEM
  -DDEBUG_ESP_HTTP_CLIENT

; TLS_MEM+HTTP_SERVER
build_flags =
  -DDEBUG_ESP_TLS_MEM
  -DDEBUG_ESP_HTTP_SERVER

; HTTP_CLIENT+HTTP_SERVER
build_flags =
  -DDEBUG_ESP_HTTP_CLIENT
  -DDEBUG_ESP_HTTP_SERVER

; SSL+TLS_MEM+HTTP_CLIENT
build_flags =
  -DDEBUG_ESP_SSL
  -DDEBUG_ESP_TLS_MEM
  -DDEBUG_ESP_HTTP_CLIENT

; SSL+TLS_MEM+HTTP_SERVER
build_flags =
  -DDEBUG_ESP_SSL
  -DDEBUG_ESP_TLS_MEM
  -DDEBUG_ESP_HTTP_SERVER

; SSL+HTTP_CLIENT+HTTP_SERVER
build_flags =
  -DDEBUG_ESP_SSL
  -DDEBUG_ESP_HTTP_CLIENT
  -DDEBUG_ESP_HTTP_SERVER

; TLS_MEM+HTTP_CLIENT+HTTP_SERVER
build_flags =
  -DDEBUG_ESP_TLS_MEM
  -DDEBUG_ESP_HTTP_CLIENT
  -DDEBUG_ESP_HTTP_SERVER

; SSL+TLS_MEM+HTTP_CLIENT+HTTP_SERVER
build_flags =
  -DDEBUG_ESP_SSL
  -DDEBUG_ESP_TLS_MEM
  -DDEBUG_ESP_HTTP_CLIENT
  -DDEBUG_ESP_HTTP_SERVER

; CORE
build_flags = -DDEBUG_ESP_CORE

; WIFI
build_flags = -DDEBUG_ESP_WIFI

; HTTP_UPDATE
build_flags = -DDEBUG_ESP_HTTP_UPDATE

; UPDATER
build_flags = -DDEBUG_ESP_UPDATER

; OTA
build_flags = -DDEBUG_ESP_OTA

; OOM
build_flags =
  -DDEBUG_ESP_OOM
  -include "umm_malloc/umm_malloc_cfg.h"

; CORE+WIFI+HTTP_UPDATE+UPDATER+OTA+OOM
build_flags =
  -DDEBUG_ESP_CORE
  -DDEBUG_ESP_WIFI
  -DDEBUG_ESP_HTTP_UPDATE
  -DDEBUG_ESP_UPDATER
  -DDEBUG_ESP_OTA
  -DDEBUG_ESP_OOM -include "umm_malloc/umm_malloc_cfg.h"

; SSL+TLS_MEM+HTTP_CLIENT+HTTP_SERVER+CORE+WIFI+HTTP_UPDATE+UPDATER+OTA+OOM
build_flags =
  -DDEBUG_ESP_SSL
  -DDEBUG_ESP_TLS_MEM
  -DDEBUG_ESP_HTTP_CLIENT
  -DDEBUG_ESP_HTTP_SERVER
  -DDEBUG_ESP_CORE
  -DDEBUG_ESP_WIFI
  -DDEBUG_ESP_HTTP_UPDATE
  -DDEBUG_ESP_UPDATER
  -DDEBUG_ESP_OTA
  -DDEBUG_ESP_OOM -include "umm_malloc/umm_malloc_cfg.h"

; NoAssert-NDEBUG
build_flags = -DNDEBUG

VTables¶

Please use one of the next build_flags:

[env:myenv]
...

; Flash (default)
build_flags = -DVTABLES_IN_FLASH

; Heap
build_flags = -DVTABLES_IN_DRAM

; IRAM
build_flags = -DVTABLES_IN_IRAM

Exceptions¶

Exceptions are disabled by default. To enable exceptions, use the following build_flags and build_unflags:

[env:myenv]
...

; Remove default exceptions disabled flag
build_unflags = -fno-exceptions

; Enable exceptions
build_flags = -fexceptions

Uploading files to file system SPIFFS¶

1. Create new project using PlatformIO IDE or initialize project using PlatformIO Core (CLI) and platformio init (if you have not initialized it yet)

2. Create data folder (it should be on the same level as src folder) and put files here. Also, you can specify own location for data_dir

3. Run “Upload File System image” task in PlatformIO IDE or use PlatformIO Core (CLI) and platformio run --target command with uploadfs target.

To upload SPIFFS image using OTA update please specify upload_port / --upload-port as IP address or mDNS host name (ending with the *.local). For the details please follow to Over-the-Air (OTA) update.

By default, will be used default LD Script for the board where is specified SPIFFS offsets (start, end, page, block). You can override it using Flash Size.

Active discussion is located in issue #382.

Over-the-Air (OTA) update¶

Firstly, please read What is OTA? How to use it?

There are 2 options:

• Directly specify platformio run --upload-port in command line

platformio run --target upload --upload-port IP_ADDRESS_HERE or mDNS_NAME.local

• Specify upload_port option in “platformio.ini” (Project Configuration File)

You also need to set upload_protocol to espota.

[env:myenv]
upload_protocol = espota
upload_port = IP_ADDRESS_HERE or mDNS_NAME.local

For example,

• platformio run -t upload --upload-port 192.168.0.255

• platformio run -t upload --upload-port myesp8266.local

[env:myenv]
upload_protocol = espota
; each flag in a new line
upload_flags =
  --port=8266

~/.platformio/packages/tool-espotapy/espota.py --help

Transmit image over the air to the esp8266 module with OTA support.

Options:
  -h, --help            show this help message and exit

  Destination:
    -i ESP_IP, --ip=ESP_IP
                        ESP8266 IP Address.
    -I HOST_IP, --host_ip=HOST_IP
                        Host IP Address.
    -p ESP_PORT, --port=ESP_PORT
                        ESP8266 ota Port. Default 8266
    -P HOST_PORT, --host_port=HOST_PORT
                        Host server ota Port. Default random 10000-60000

  Authentication:
    -a AUTH, --auth=AUTH
                        Set authentication password.

  Image:
    -f FILE, --file=FILE
                        Image file.
    -s, --spiffs        Use this option to transmit a SPIFFS image and do not
                        flash the module.

  Output:
    -d, --debug         Show debug output. And override loglevel with debug.
    -r, --progress      Show progress output. Does not work for ArduinoIDE
    -t TIMEOUT, --timeout=TIMEOUT
                        Timeout to wait for the ESP8266 to accept invitation

Demo¶

Using Arduino Framework with Staging version¶

PlatformIO will install the latest Arduino Core for ESP8266 from https://github.com/esp8266/Arduino. The Git should be installed in a system. To update Arduino Core to the latest revision, please open PlatformIO IDE and navigate to PIO Home > Platforms > Updates.

1. Please install PlatformIO IDE

2. Initialize a new project, open “platformio.ini” (Project Configuration File) and set platform to https://github.com/platformio/platform-espressif8266.git#feature/stage. For example,

   [env:nodemcuv2]
   platform = https://github.com/platformio/platform-espressif8266.git#feature/stage
   board = nodemcuv2
   framework = arduino
   

3. Try to build project

4. If you see build errors, then try to build this project using the same stage with Arduino IDE

5. If it works with Arduino IDE but doesn’t work with PlatformIO, then please file new issue with attached information:

   • test project/files

   • detailed log of build process from Arduino IDE (please copy it from console to https://hastebin.com)

   • detailed log of build process from PlatformIO Build System (please copy it from console to https://hastebin.com)

Stable¶

; Latest stable version
[env:latest_stable]
platform = espressif8266
board = ...

; Custom stable version
[env:custom_stable]
platform = espressif8266@x.y.z
board = ...

Upstream¶

[env:upstream_develop]
platform = https://github.com/platformio/platform-espressif8266.git
board = ...

4D Systems¶

Adafruit¶

Amperka¶

DigiStump¶

Doit¶

DycodeX¶

ESPert¶

ESPino¶

Espressif¶

Heltec¶

Invent One¶

NodeMCU¶

Olimex¶

SeeedStudio¶

SparkFun¶

SweetPea¶

ThaiEasyElec¶

WEMOS¶

WifiDuino¶

XinaBox¶