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# cmd_digital_in

Command to read in digital signal from a connected Arduino board

### Calling Sequence

    values = cmd_digital_in(h,pin_no)

### Parameters

h :

  Board number, reserved for future use. For this version, any number would do

pin_no :

  Digital pin to measure the signal

### Description

The Arduino board has a set of logical ports (digital) that are used for writing or reading data from a component.

To map a UNO, ports 2-13 are available (0 and 1 are used for serial transmission). For MEGA board, ports 2-53 are available. The port takes the low logic level (0) or logic high (1) which corresponds to the reference voltage.

### Examples

    ok = open_serial(1,9,115200)
    val = cmd_digital_in(1,2)
    close_serial(1)

### See also

- cmd_digital_out

### Authors

- Bruno JOFRET, Tan C.L.

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