![]() ![]() The ones highlighted in yellow are OK to use, but you need to pay attention because they may have unexpected behavior mainly at boot. ![]() The pins highlighted in green are OK to use. The following table shows the correspondence between the labels on the silkscreen and the GPIO number as well as what pins are the best to use in your projects, and which ones you need to be cautious. For example, D0 corresponds to GPIO16 and D1 corresponds to GPIO5. One important thing to notice about ESP8266 is that the GPIO number doesn’t match the label on the board silkscreen. We’ve put together a handy PDF that you can download and print, so you always have the ESP8266 diagrams next to you:ĭownload PDF Pinout Diagrams » ESP8266 Peripherals Download PDF with ESP8266 Pinout Diagrams
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