NodeMCU-and-JavaScript | Programming NodeMCU boards with Espruino

I spent 2-3 days to make everything working, so I decided to provide a compressed folder (esptool.py v1.2 & Espruino v1.87) with everything you need to flash the firmware. You probably need to install pyserial for using the esptool.py. It can be achieved with sudo easy_install pyserial(macOS), sudo apt-get install python-serial(Linux) or sudo pip install pyserial. Move inside the downloaded folder. Erase the flash memory. Flash the NodeMCU with Espruino. After flashing the firmware, you may have to unplug/plug the NodeMCU to the computer. To test the installation process, you can use Screen and send some JavaScript code, like process.memory()or digitalWrite(NodeMCU.D4, HIGH); to turn on the built-in led. Launch Google Chrome, install the Espruino Web IDE (extension) and modify the Baud Rate to 115200 (Espruino Web IDE > Settings > Communications > Baud Rate). It's possible to program the board Over-The-Air by defining a hostname and configuring a connection to it. Use the Wi-Fi example and add its hostname espruino.local:23 in the configuration (Espruino Web IDE > Settings > Communications > Connect over TCP Address). THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Run Espruino on the NodeMCU devkit
Espruino Hardware Reference
Download Espruino
CP210x USB to UART Bridge VCP Drivers
Esptool.py
Tutorials and examples