Table 5: Digital Sensor Port (D2)
Pin Function Arduino Software (IDE) pin assignment ( )
Pin 1 Ground N/A
Pin 2 +5 volts, 100 mA N/A
Pin 3 Digital input/output Digital I/O (9)
Pin 4 Digital input/output Digital I/O (2)
Table 6: Digital Sensor Port (D3)
Pin Function Arduino Software (IDE) pin assignment ( )
Pin 1 Ground N/A
Pin 2 +5 volts, 100 mA N/A
Pin 3 Digital input/output Digital I/O (10)
Pin 4 Digital input/output Digital I/O (3)
Table 7: Digital Sensor Port (D4)
Pin Function Arduino Software (IDE) pin assignment ( )
Pin 1 Ground N/A
Pin 2 +5 volts, 100 mA N/A
Pin 3 Digital input/output Digital I/O (11)
Pin 4 Digital input/output Digital I/O (4)
Note: Digital sensor
ports D2-D4 can
also be configured
as software-
implemented serial
ports using the
Arduino Software (IDE)
Serial Library.
Appendix 133
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