ESP8266: Connection to DS3231 RTC

The objective of this post is to explain how to connect the ESP8266 to a DS3231 Real Time Clock. It also explains how to create a simple program to configure the time and date of the RTC and to measure it periodically.

ESP8266: Read DHT11 measurements

The objective of this post is to show how to connect the DHT11 sensor to an ESP8266 and write a simple program to measure temperature and humidity. We assume the use of the Arduino IDE for programming the ESP8266.