MsgBox ('Something is wrong, command not being read correctly') 'Another way of setting the command that didnt work

'Tried sending the direct whole command as input 'I was first defining it as string then tried defining it as Variant Here is some of my code (for sending, with the other options used marked out as comments): Private Sub PWM_cmd_Send(ByVal cmd As String) each byte is written in program as a hex command). The first charachter is always t which is followed by a 8 byte size hex command (i.e. I have also tried converting the hex to char, and also sending as a string.Ī little detail about the command that i am supposed to send. The only problem i am seeing here is that while the terminal Putty is correctly interpreting or passing on the command, the excel vba program is either converting it to something else or not sending the proper string. The device is working with the terminal putty, but when i send the same command such as: t02180002F4012C01B80B (here only the first character is a 't' the rest are all supposed to be hex) the device/CANUSB does not send the command over to the PWM. I have first tested my commands while connected to a terminal Putty with the relevant com settings. I have to send it a pre configured/pre-determined command to actviate the PWM. The device is attached to the computer via USB and is acting as a Virtual COM Port.

I am writing an Excel code to communicate with a PWM generator through a CANUSB. I have completed most of the Project but am stuck at an apparent small road block.Ī bit of back story. I am currently working on a VBA project in Excel.

First of all thanks for taking the time to read my question.

Excel vba serial port programming