ESP8266 Open SDK

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Install in Debian/Linux/Lubuntu

  • Folder instrucion, cd into /opt/ first
make app folder, for example nodemcu, git clone from github, should be /opt/nodemcu-firmware
git clone the esp-open-sdk folder, should be /opt/esp-open-sdk
  • Install all tools
sudo apt-get install make unrar-free autoconf automake libtool gcc g++ gperf \
flex bison texinfo gawk ncurses-dev libexpat-dev python-dev python python-serial \
sed git unzip bash help2man wget bzip2

Install esp-open-sdk

  • Clone
cd /opt
git clone --recursive
  • Compile esp-open-sdk, to build the self-contained, standalone toolchain+SDK:
  • This took 1-2 hours, and if sucessfully installed you will see
Xtensa toolchain is built, to use it:
export PATH=/opt/nodemcu/esp-open-sdk/xtensa-lx106-elf/bin:$PATH
Espressif ESP8266 SDK is installed, its libraries and headers are merged with the toolchain

Use toolchain

  • First always run export line
export PATH=/opt/nodemcu/esp-open-sdk/xtensa-lx106-elf/bin:$PATH  
  • Try test with source code blinky example here
  • Compile nodemcu code
cd /opt/nodemcu/nodemcu-firmware
  • Brand new firmware bin file can be found in "bin" folder

Trouble shoot

Error: configure: error: could not find GNU libtool >= 1.5.26

  • Need to install this: sudo apt-get install libtool-bin

You must NOT be root to run crosstool-NG

  • add a none root user
user add esp
chown -R esp:esp /opt/nodemcu/
chmod u+rwx /opt/nodemcu/

Using with Vigrant

  • Install it via vagrant, get the vagrant git package:
git clone
cd esp8266-micropython-vagrant
  • provision vagrant box: vagrant up and vagrant ssh

Compile SDK

cd ~/esp-open-sdk

This will take 30-90 mins' to finish, actual time depends on your machine, not very necessary to do the following step, edit the Vagrantfile

# Bump the memory allocated to the VM up to 1 gigabyte as the compilation of
# the esp-open-sdk tools requires more memory to complete.
v.memory = 1024

and the compiling will be finished like this, SDK is installed now.

Xtensa toolchain is built, to use it:
export PATH=/home/vagrant/esp-open-sdk/xtensa-lx106-elf/bin:$PATH
Espressif ESP8266 SDK is installed, its libraries and headers are merged with the toolchain

Setup the Path of Bin of SDK

Run this command to update the .profile file that runs whenever you log into the virtual machine:

echo "PATH=$(pwd)/xtensa-lx106-elf/bin:\$PATH" >> ~/.profile

Logout and login again to process the update:

vagrant ssh

and check the path is correct or not

echo $PATH

the result should be

  • You can also check the .profile directly by following command
vi ~/.profile

and the result should be like:

Check the path of bin.png