micropython

pip install esptool
pip install adafruit-ampy

identify

esptool.py chip_id

download micropython from http://micropython.org/download#esp8266

wget http://micropython.org/resources/firmware/esp8266-20171101-v1.9.3.bin

erase (optional ?) and upload

esptool.py --port /dev/ttyUSB0 erase_flash
esptool.py --port /dev/ttyUSB0 --baud 460800 write_flash --flash_size=detect 0 esp8266-20171101-v1.9.3.bin

access from serial over USB

sudo apt install picocom
picocom /dev/ttyUSB0 -b115200

network wifi STA

import network
sta_if = network.WLAN(network.STA_IF)
sta_if.active(True)
sta_if.connect('<your ESSID>', '<your password>')
sta_if.ifconfig()

('192.168.2.32', '255.255.255.0', '192.168.2.1', '192.168.2.1')

enable webrepl

import webrepl_setup

reboot and connect to webrepl using http://micropython.org/webrepl/

ampy -p /dev/ttyUSB0 put blink.py  /main.py

from machine import Pin
from time import sleep

# GPIO16 (D0) is the internal LED for NodeMCU
led = Pin(16, Pin.OUT)

# The internal LED turn on when the pin is LOW
while True:
    led.value(not led.value())
    #led.on()
    sleep(1)
    #led.off()
    #sleep(1)