Simple Blynk Credentials Manager for STM32 boards using built-in LAN8742A Ethernet, ENC28J60 or W5x00 Ethernet shields, with or without SSL, configuration data saved in EEPROM. Library for configuring/auto(re)connecting LAN8742A Ethernet built-in, W5X00 or ENC28J60 Ethernet shields to Internet and Blynk at runtime.