Welcome to ESP8266 Arduino Core’s documentation!

Contents:

• Installing
  • Boards Manager
  • Using git version
• Reference
  • Digital IO
  • Analog input
  • Analog output
  • Timing and delays
  • Serial
  • Progmem
• Libraries
  • WiFi(ESP8266WiFi library)
  • Ticker
  • EEPROM
  • I2C (Wire library)
  • SPI
  • SoftwareSerial
  • ESP-specific APIs
  • mDNS and DNS-SD responder (ESP8266mDNS library)
  • SSDP responder (ESP8266SSDP)
  • DNS server (DNSServer library)
  • Servo
  • Other libraries (not included with the IDE)
• File system
  • Flash layout
  • File system limitations
  • Uploading files to file system
  • File system object (SPIFFS)
  • Filesystem information structure
  • Directory object (Dir)
  • File object
• ESP8266WiFi
  • Introduction
  • Class Description
  • Diagnostics
  • What’s Inside?
• OTA Updates
  • Introduction
  • Arduino IDE
  • Web Browser
  • HTTP Server
  • Stream Interface
  • Updater class
• PROGMEM
  • Intro
  • Declare a flash string within code block.
  • Functions to read back from PROGMEM
  • How do I declare a global flash string and use it?
  • How do I use inline flash strings?
  • How do I declare and use data in PROGMEM?
  • How do I declare some data in PROGMEM, and retrieve one byte from it.
  • In summary
• Boards
  • Adafruit HUZZAH ESP8266 (ESP-12)
  • ESPresso Lite 1.0
  • ESPresso Lite 2.0
  • Phoenix 1.0
  • Phoenix 2.0
  • NodeMCU 0.9
  • NodeMCU 1.0
  • Olimex MOD-WIFI-ESP8266-DEV
  • Olimex MOD-WIFI-ESP8266
  • Olimex ESP8266-EVB
  • SparkFun ESP8266 Thing
  • SweetPea ESP-210
  • ESPino
  • WifInfo
  • DigiStump Oak
  • Generic ESP8266 modules
  • Serial Adapter
  • Minimal Hardware Setup for Bootloading and Usage
  • ESP to Serial
  • Minimal
  • Improved Stability
  • Boot Messages and Modes
  • Generic ESP8285 modules
  • WeMos D1
  • WeMos D1 mini
  • ESPino (WROOM-02 Module) by ThaiEasyElec
  • gen4-IoD Range by 4D Systems
• FAQ
  • I am getting “espcomm_sync failed” error when trying to upload my ESP. How to resolve this issue?
  • Why esptool is not listed in “Programmer” menu? How do I upload ESP without it?
  • My ESP crashes running some code. How to troubleshoot it?
  • This Arduino library doesn’t work on ESP. How do I make it working?
  • In the IDE, for ESP-12E that has 4M flash, I can choose 4M (1M SPIFFS) or 4M (3M SPIFFS). No matter what I select, the IDE tells me the maximum code space is about 1M. Where does my flash go?
  • I have observed a case when ESP.restart() doesn’t work. What is the reason for that?
  • How to resolve “Board generic (platform esp8266, package esp8266) is unknown” error?
• Exception causes
• Debugging
  • Introduction
  • Informations
• Stack Dump
  • Introduction
• Using with Eclipse
  • What to Download
  • Setup Arduino
  • Setup Eclipse
  • Eclipse wont build
• Changelog
  • 2.3.0
  • 2.2.0
  • 2.0.0
  • 1.6.4-673-g8cd3697
  • 1.6.4-628-g545ffde