====== Expressiv ESP8266 / ESP32 ======

==== ESP8266 / ESP32 ====


  * https://www.heise.de/developer/artikel/Arduino-goes-ESP8266-3240085.html
  * https://www.esp8266.com/wiki/doku.php?id=start
  * 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/

=== Installation des Virtual-Com-Port (VCP) Treibers: ===

  * https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers

=== Programmieren des ESP32 (Mac): ===

<code bash>
# 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
</code>

Zugriff auf das Board über die serielle Verbindung mit ''screen'':
<code bash>
screen /dev/tty.SLAB_USBtoUART  115200
screen -ls # List Screen sessions
screen -r  # Re-Attach
</code>

=== MicroPython auf ESP8266/ESP32 ===

  * [[iot:micropython|MicroPython auf ESP8266/ESP32]] 


=== Pinout ESP32: ===

  * https://ouilogique.com/pinouts/

=== ESP32 Live GPIO Monitoring ===

  * https://www.youtube.com/watch?v=UxkOosaNohU 


==== Wifi ====

===  Probleme mit Spannungsversorgung: Brownout bei WiFi-Start===

:!: **Abhilfe**: Kondensator > 100µF zwischen VCC und GND

 * https://github.com/espressif/arduino-esp32/issues/863
 * https://github.com/nkolban/esp32-snippets/issues/168


=== Examples: ===


  * 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/

=== Geschwindigkeitsmessung: ====

  * https://github.com/espressif/esp-idf/tree/master/examples/wifi/iperf
==== Power-Saving: ====

  * https://randomnerdtutorials.com/esp8266-deep-sleep-with-arduino-ide/
  * https://randomnerdtutorials.com/latching-power-switch-circuit-auto-power-off-circuit-esp32-esp8266-arduino/
  * [[https://microcontrollerslab.com/micropython-esp32-deep-sleep-mode-wake-up-sources/|MicroPython: ESP32 Deep Sleep Mode and Wake Up Sources]]
==== Mesh Networking ====

  * [[https://github.com/olab-io/ESP8266-Research/blob/master/defining_mesh_network_for_esp8266.md|Mesh Network for ESP8266]]
  * https://tech.scargill.net/esp8266-mesh-experiment/