• https://www.heise.de/developer/artikel/Arduino-goes-ESP8266-3240085.html
• http://www.mikrocontroller.net/articles/ESP8266
• https://espressif.com/en/products/hardware/esp8266ex/overview
• https://www.heise.de/ct/ausgabe/2018-2-Sechs-IoT-Projekte-flexibel-und-ohne-Cloud-3930050.html
• https://hackaday.com/2018/08/26/demystifying-the-esp8266-with-a-series-of-tutorials/

• http://docs.micropython.org/en/latest/esp8266/general.html
• https://boneskull.com/micropython-on-esp32-part-2/
• https://docs.micropython.org/en/latest/esp32/quickref.html
• https://docs.zerynth.com/latest/official/board.zerynth.nodemcu_esp32/docs/index.html

• https://learn.adafruit.com/micropython-basics-loading-modules/frozen-modules
• https://github.com/micropython/micropython-lib

Programmieren des ESP32 (Mac):

# esptool installieren:
$ pip install --user esptool
# Board vorbereiten (Flash Speicher löschen)
$ /Users/xxx/Library/Python/3.7/bin/esptool.py -p /dev/tty.SLAB_USBtoUART erase_flash
# Board mit einem MicroPython-Image beschreiben: 
# /Users/xxx/Library/Python/3.7/bin/esptool.py --chip esp32  -p /dev/tty.SLAB_USBtoUART --baud 115200 write_flash -z 0x1000 esp32-20190125-v1.10.bin

Zugriff auf das Board über die serielle Verbindung mit screen:

screen /dev/tty.SLAB_USBtoUART  115200
screen -ls # List Screen sessions
screen -r  # Re-Attach

MQTT auf dem ESP32:

• https://randomnerdtutorials.com/micropython-mqtt-esp32-esp8266/

• https://arduino-esp8266.readthedocs.io/en/latest/esp8266wifi/client-examples.html
• https://www.hackster.io/Salmanfarisvp/webserverblink-using-nodemcu-26e1ed
• https://www.arduino.cc/en/Reference/WiFi
• https://www.mikrocontroller-elektronik.de/nodemcu-esp8266-tutorial-wlan-board-arduino-ide/

• https://github.com/espressif/esp-idf/tree/master/examples/wifi/iperf

• https://randomnerdtutorials.com/esp8266-deep-sleep-with-arduino-ide/
• https://randomnerdtutorials.com/latching-power-switch-circuit-auto-power-off-circuit-esp32-esp8266-arduino/

• Mesh Network for ESP8266
• https://tech.scargill.net/esp8266-mesh-experiment/