Currently I have my pi connected to my breadboard using a cobbler and breakout cable so I can connect some sensors (DHT22 and BMP280). Is there are way I can also connect my serial cable to it so I can also access putty?

  • yes, there probably is a way
    – jsotola
    Commented May 12, 2021 at 4:41
  • yes, use GPIO14 and GPIO15 Commented May 12, 2021 at 5:17

1 Answer 1


Yes, you can. For this you need to look up the pinout of your RPi.

Here is one for the RPi4, but iirc they are all the same. (source)


Now we have to look what protocol you need. Most common it's UART, I2C or SPI.

If you need UART, we look for TXD and RXD -> GPIO14 and GPIO15

If you need I2C, we look for SDA and SCL -> GPIO2 and GPIO2

If you need SPI, we look for MOSI, MISO, SCLK and CS (chip select, I don't know why it's called CE0 on RPi) -> GPIO10, GPIO9, GPIO11 and GPIO8


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