write
Write data to serial port
Description
Examples
Write and Read Data with Serial Port Device
Create a connection to a serial port device. In this example, the serial port at
COM3
is connected to a loopback device.
device = serialport("COM3",9600)
device = Serialport with properties: Port: "COM3" BaudRate: 9600 NumBytesAvailable: 0 Show all properties, functions
Write the values [1,2,3,4,5]
in uint8 format.
write(device,1:5,"uint8")
Since the port is connected to a loopback device, the data you write to the device is returned to MATLAB. Read all the data.
read(device,5,"uint8")
ans = 1×5 1 2 3 4 5
Input Arguments
device
— Serial port connection
serialport
object
Serial port connection, specified as a serialport
object.
Example: write(device,1:5,"uint8")
writes to the serial port
connection device
.
data
— Numeric or ASCII data
numeric | character vector | string scalar
Numeric or ASCII data, specified as a row (1-by-N
) or column
(N
-by-1) vector of numeric values or as a character vector or
string scalar of text. For all numeric datatype
types,
data
is a row vector of values.
Example: write(device,[20:24],"int16")
writes the values
[20,21,22,23,24]
.
Data Types: single
| double
| int8
| int16
| int32
| int64
| uint8
| uint16
| uint32
| uint64
| char
| string
datatype
— Size and format of each value
"uint8"
| "int8"
| "uint16"
| "int16"
| "uint32"
| "int32"
| "uint64"
| "int64"
| "single"
| "double"
| "char"
| "string"
Size and format of each value, specified as a character vector or string.
datatype
determines the number of bytes to write for each value
and the interpretation of those bytes as a MATLAB data type. For ASCII text, you can specify datatype
as either "char"
or "string"
.
Example: write(device,1:5,"int16")
writes data as int16 data
type.
Data Types: char
| string
Version History
Introduced in R2019b
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