This is an upgrade version of D-duino. I upgraded Micro USB type, and redesigned the circuit. The whole board is smaller than last version. I moved flash button to back because it is not used quite often. RST button moved to the top of OLED. I am satisfied with the layout because I think it is convenient for developers.
I am happy to find somebody has already started to copy my product. But I am worry about the quality of shanzhai products. I want more players to play D-duino for fun.
D1(GPIO5) connected with SDA D2(GPIO4) connected with SCL
Code examples: https://github.com/lspoplove/D-duino
How to start with D-duino: https://hackaday.io/project/19922-how-to-start-with-d-duinod-duino-bx-8266
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