Simple WiFiManager for Blynk with MultiWiFi Credentials, for Mega, SAM DUE, SAMD21, SAMD51, nRF52, STM32, etc. boards running ESP8266/ESP32-AT shields. Configuration data saved in EEPROM, SAMD EEPROM-emulated FlashStorage, SAM-DUE DueFlashStorage or nRF52 LittleFS. Library for configuring/auto(re)connecting Mega, SAM DUE, SAMD21, SAMD51, nRF52, STM32, etc., running ESP8266/ESP32-AT shields, to MultiWiFi and Blynk at runtime.