esp-wroom-02 burner

The projects on esp8266 here are basically made using Essence's esp-12 module. This module is relatively large, and the official module produced by Espressif is called esp-wroom-02. In fact, it is all based on the esp8266ex chip and has complete functions. The same, but the pin definitions are different. The official module is very compact, about one-third smaller than the third-party module. And more importantly, an official module in Little Yellow Fish costs just over one yuan, which is so cheap that I stocked up on them.
 
This board directly burns the esp-wroom-02 module, and can be used as a development board. After use, it can be disassembled and then welded to the final work. In this way, there is no need to design and burn some functions in the final work, thus saving space and money. The recorder can be used repeatedly in different projects.
 
 
Spring pins can be bought in a store that sells burners, usually 50-100 pieces per bag, one for each pin. There are two methods for welding: 1. Use an iron stationery clip to neatly organize the pins. Clamping, 2 is to directly insert the module as a fixation. However, it is still difficult to ensure that the welding is completely flush in the end. It is normal to be a little skewed. Just use tweezers to adjust it. Of course, you can also change my project and make the hole smaller so that the spring pin will not shake after being inserted. This copper pin is very thin.