VB6 Send Receive via comport.

I need help to add the following to a simple VB6 program.

I am getting information on request from a closed loop stepper motor that is running off a Arduino zero (search: MKS SERVO42A).

The information is being sent via the com port. Another Freelancer has helped me setup the first part where I am able to send a request to the Arduino and have the arduino make the changes required. However I know need to be able to read and use some information that is being sent from the arduino.

Commands sent from the VB6 program do prompt a reply from the Arduino. Most are just confirmations and I have no need of them. They can just be ignored.

However 2 requests for information from the VB6 program, returns information that I need.

I am unable to format the responses from the Arduino. The requested data I need will be interspersed between the commands that can be ignored.

Here the are:

The string sent is: readpos

The return is for example : encoder -110.15 [There is a space between "encoder" and the value]

The value that follows "encoder" is anywhere between 50000.00 and -50000.00. There is no "+" when the value is positive. So the received string is of a varied length.

I need to extract that value for use. So I would like that value to appear in a Textbox which is cleared and refreshed each time the request is made. (Which is 30ms on the timer)

The same is needed for the following request.

The string sent is: geterror

The return is for example : error 10.87 [There is a space between "error" and the value]

The value that follows "error" is also anywhere between 50000.00 and -50000.00. There is no "+" when the value is positive.

This received string is then also of a varied length.

I need to extract that value for use. So I would like that value to appear in another Textbox which is cleared and refreshed each time the request is made. (Which will be on the same 30ms on a timer)

The timer is not yet in the program and will be added later.

I am able to send and receive successfully in a VB6 program called Visual Basic Terminal. So the Arduino does work. However I need to be able to get the above to work for my project. I am not stuck on using the VB6 program that was created for me, but I am including it (attachment MSComm) - the send function does work as I asked. I just cannot receive data, although we made an attempt.

I will also include as an attachment the VB terminal program that allows both Send and Receive. (Attachment - VBTerminal)

I need to work in VB6 because of another program that will link to this one, which is only available in VB6.

I think that about covers it. I cannot pay more than $100 unfortunately.

Arduino Visual Basic

Project ID: #26497031

About the project