====== micropython ======

===== esptools / ampy =====

<code>
pip install esptool
pip install adafruit-ampy
</code>

identify
<code>
esptool.py chip_id
</code>

===== esp32 =====

Download firmware from http://www.micropython.org/download

erase flash (before any micropython deploy)
<code>
export PORT=/dev/ttyUSB1
esptool.py --chip esp32 --port $PORT erase_flash
</code>

write firmware
<code>
esptool.py --chip esp32 --port $PORT write_flash -z 0x1000 esp32-20181103-v1.9.4-683-gd94aa577a.bin
</code>


==== old ====

Based on [[https://github.com/loboris/MicroPython_ESP32_psRAM_LoBo|loboris fork]] of micropython

<code>
sudo apt-get install git wget make libncurses-dev flex bison gperf python python-serial
</code>

<code>
git clone --depth 1 https://github.com/loboris/MicroPython_ESP32_psRAM_LoBo
cd MicroPython_ESP32_psRAM_LoBo
cd MicroPython_BUILD
./BUILD.sh menuconfig
./BUILD.sh
./BUILD.sh flash
# reboot board disconnecting power
</code>



  * download micropython from http://micropython.org/download#esp32



If you are putting MicroPython on for the first time then you should first erase the entire flash
<code>
esptool.py --port /dev/ttyUSB0 erase_flash
</code>



===== esp8266 =====

download micropython from http://micropython.org/download#esp8266
<code>
wget http://micropython.org/resources/firmware/esp8266-20180511-v1.9.4.bin
</code>

erase (optional ?) and upload
<code>
#esptool --port /dev/ttyUSB0 erase_flash
esptool --port /dev/ttyUSB0 --baud 460800 write_flash --flash_size=detect 0 esp8266-20180511-v1.9.4.bin

# oppure
esptool --port /dev/ttyUSB0 --baud 115200 write_flash --flash_mode dout --verify --flash_size=detect -fm dio 0 esp8266-20180511-v1.9.4.bin
</code>

after press buttons !!!!

access from serial over USB
<code>
sudo apt install picocom
picocom /dev/ttyUSB0 -b115200
</code>

network wifi STA
<code>
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')
</code>

enable webrepl
<code>
import webrepl_setup
</code>

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


===== main =====

<code>
ampy -p /dev/ttyUSB0 put blink.py  /main.py
</code>
===== led =====

<code>
from machine import Pin
from time import sleep

# GPIO16 (D0) is the internal LED for NodeMCU
# PIN 22 fro TTGO MINI32
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)
</code>