Pimoroni Pico breakout garden For some reason, Pimoroni does not provide schematics. Thats fine if you just stick the Pico onto the breakout garden. But much more cumbersome if you have a bunch of dev boards involved. Looking from the top, female headers pointing up, breakout sockets pointing down. 1-| 2-| 3=| gnd 4-| 5-| 6=| gp4, i2c0 sda 7=| gp5, i2c0 scl 8=| gnd 9-| 10-| 11-| 12-| 13=| gnd 14-| 15-| 16-| 17-| 18=| gnd 19-| 20-| |-40 |-39 |=38 gnd |-37 |=36 3.3v |-35 |-34 |-33 |-32 |-31 |-30 |-29 |=28 gnd |-27 |-26 |-25 |-24 |=23 gnd |-22 |-21 Breakout sockets, view from above, so these would be pointing down and are under the board. The I2C "none" pins are connected to each other! 2 / |= gnd |= none |= scl, gp5 |= sda, gp4 |= 3.3v I2C \ A / |= ? |= ? |= ? |= ? |= ? |= ? |= ? SPI \ 1 / |= gnd |= none |= scl, gp5 |= sda, gp4 |= 3.3v I2C \