Particle Monitor One, Manual

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If you wish to build upon the I/O Card, there is a small prototyping area (1).
If you need signals from the expansion card interface, they are available in the rows of pins (19, 20).
If you wish to disable an interface that you are not using and re-use the pins on the M12 8-pin
connector, there is a small trace jumper between the rows of pins in area (14). Cutting this trace
isolates the expansion card signal from the signal to the connector (16). Then you can solder a small
jumper wire to replace the signal on the M12 8-pin.
The Eagle CAD schematic and board layout files for the I/O card can be found in the Monitor One
Github repository .
Interconnects - I/O Card
BLOCK DIAGRAM - I/O CARD
SCHEMATICS - I/O CARD