ESP8266-based WLAN NAT "Router"

use cases: WLAN range extender, covering existing WLAN with new SSID / password, inexpensive multiple WLANs, ... later: monitoring traffic

Credits:

• based on: https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266WiFi/examples/RangeExtender-NAPT/RangeExtender-NAPT.ino
• see also work of https://github.com/martin-ger