nodemcu-firmware/lua_modules/ds3231/ds3231-example.lua

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require("ds3231")
-- ESP-01 GPIO Mapping
gpio0, gpio2 = 3, 4
ds3231.init(gpio0, gpio2)
second, minute, hour, day, date, month, year = ds3231.getTime();
-- Get current time
print(string.format("Time & Date: %s:%s:%s %s/%s/%s", hour, minute, second, date, month, year))
-- Don't forget to release it after use
ds3231 = nil
package.loaded["ds3231"]=nil