The main use is that the esp12F chip is small in size and has WiFi function. By borrowing the mqtt protocol, the temperature and humidity can be uploaded to the cloud. The time can also be obtained directly from the NTP network using DS1302. However, considering the issue of power consumption, DS1302 plus sleep is used. And reduce power consumption in the form of key wake-up. The passive buzzer can play music and can also be controlled from the cloud, which is very convenient. The additional LED is packaged in warm white 5730 SMD and can be used as an emergency flashlight. The power supply interface of this device is very rich. It originally has four interfaces, miniUSB, typec, USB, and KP126 battery interface, but my sister. . . The phone is from Apple, and I have removed the typec, which can also reduce the size. The KP126 battery interface is mainly for low power consumption design in the future. The combination of this module and KP126 can directly superimpose the lithium battery charging and discharging module, allowing the clock to be separated from the USB The binding of the thread makes it more convenient to use. The overall size is about 60*40*20, and the size is quite OK. On the back is a cute kitten and a message of encouragement. You can also replace it with your favorite sentence!
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