This version is based on the revised version of the IoT development board-ESP8266 project. The definition of the IO port has not been changed, and Jixiaoxin's development routines can be used normally.

Searching for " Jixiaoxin " from the open source platform will show the project of the Type-C version of the Jixiaoxin ESP8266 development board . I didn't think much about it at the time and just took it to make the board (Jialichuang 0 yuan for proofing).

The board can be used normally after it comes back. But the discovery wasn't quite perfect.

So after a slight modification, it became the current version. The specific changes are as follows:

• The new version of Jixiao uses Mini-USB and changed it to the more commonly used Type-C interface. In fact, this was changed by brother acha . I just copied it.
• The key packaging of the new version of Jixiao seems to be inappropriate, so it has been changed to a smaller key.
• Jixiaoxin's version of OLED is Jixiaoxin's own module. The size is not the size we usually buy. I changed it to another package, but it still seems to be wrong...
• Jixiaoxin's temperature and humidity module is Jixiaoxin's own module, and the pin sequence is different from what we usually buy. (Forgot to change it)
• The new version of Jixiao does not have the "one-click download circuit", it has been added.
• Now that there is a "one-click download circuit", the BOOT button has no effect and should be removed.
• Move and arrange the components on the board slightly.

PCB board:

Effect of welding parts:

Actual power-on effect:

In fact, my version is still not perfect:

• The OLED packaging is still wrong, but it still works.
• The DHT11 interface has not been changed yet. I did not buy a module from Jixiaoxin or a module board on the market. Instead, I used a perforated board to weld one myself. It is made according to the pin arrangement above, so it can be used.
• The ADC input does not have a voltage divider circuit (the maximum input to the ADC pin is 1V).
• The two LEDs below are misaligned, which is unbearable for obsessive-compulsive disorder.

Finally, I would like to say that I am really not used to using Lichuang EDA. I will continue to use AD in the future.