05 aprilie 2018

NODEMCU v1.0 ESP-12 default pins


I2C can be used to connect up to 127 nodes via a bus that only requires two data wires, known as SDA and SCL.
  • SDA=4 => D2.
  • SCL=5 => D1


SPI is much simpler than I2C. Master and slave are linked by three data wires, usually called MISO, (Master in, Slave out), MOSI (Master out, Slave in) and M-CLK.
  • M-CLK => D5
  • MISO => D6
  • MOSI => D7
(SPI Bus SS (CS)is D8.)

I found it here:

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