ESP8266 ESP-01 with DS3231 and I2C LCD - ESP8266 real time clock project with set buttons. Circuit diagram and Arduino code at:
https://simple-circuit.com/esp8266-es...
ESP8266 NodeMCU with SSD1306 OLED and DS3231 RTC:
• ESP8266 NodeMCU with SSD1306 OLED and...