Use this forum to chat about hardware specific topics for the ESP8266 (peripherals, memory, clocks, JTAG, programming)

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By fenyvesi
#10087 It is easy to get time from Web but if you use a thermostat required to work standalone also, to have an RTC module is a must have.

I prepared it from the IoT example (i2c) and a ported PIC lib (Ds1307).

DS1307 is a 5V device, but you can get a DS1338U33 (3.3V) module from 2-3 USD.

ESP-07 was used, the PIN definition and other settings can be checked in the program.
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