Use this forum to chat about hardware specific topics for the ESP8266 (peripherals, memory, clocks, JTAG, programming)

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By martinayotte
#37485 There are plenty of diagrams/pinout on the web.
Here is one :
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RST/CH_PD/GPIO2/GPIO0 all needs pullups resistors (around 10K) to VCC for normal execution mode, and bringing temporarily the GPIO0 to GND while resetting or power recyclying to get into UpLoad mode.