A simple library that implements port mappings to router using UPnP SSDP for Arduino boards, running on nRF52, SAMD21/SAMD51, STM32F/L/H/G/WB/MP1, Teensy, RP2040-based boards, WT32_ETH01, Portenta_H7, etc. besides ESP8266/ESP32, using ESP WiFi, WiFiNINA, Ethernet W5x00, ESP8266/ESP32 AT-command WiFi, Portenta_H7 Murata WiFi or Vision-shield Ethernet.. It is designed to be light-weight and can run only on Ethernet or WiFi hardware/library supporting UDP Multicast. Supporting Teensy 4.1 QNEthernet now.
