1. Open a new windows form application program.
2. Add the mscomm32.ocx to the toolbox in your project if not added. refer to Figure 1.
- Figure 1
3. Set up the serial port
-
Set serial port from the property window as Figure 2.
- Figure 2
-
Set serial port from the code:
‘set the port
AxMSComm1.Settings = “9600, N, 8, 1”
AxMSComm1.InputLen = 1 ‘Set 1 character per input statement
AxMSComm1.CommPort = 2 ‘set com port number
4. Open the serial port
AxMSComm1.PortOpen = True
5. Read from serial port
- Read N number of characters
AxMSComm1.InputLen = N ‘Set N character per input statement
Dim readText as String
readText = AxMSComm1.Input
- Read all the characters
AxMSComm1.InputLen = 0
Dim readText as String
readText = AxMSComm1.Input
6. Write the text to serial port
AxMSComm1.Output = “Text to write”
7. Close the serial port
AxMSComm1.PortOpen = False
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