Simple WiFiManager for Blynk with MultiWiFi Credentials, for Mega, SAM DUE, SAMD21, SAMD51, nRF52, STM32, RP2040-based, etc. boards running ESP8266 AT shields. Configuration data saved in EEPROM, SAMD EEPROM-emulated FlashStorage, SAM-DUE DueFlashStorage or nRF52/RP2040 LittleFS
