cwi2k
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serial communication
hi i am trying to send data via the serial port it is sending ok as i can read it on a program that i have monitoring the port. the problem i have is that the device it is talking to is not recognising the command, the rx light comes on but it doesnt do anything i think it is due to the length of the data going out.
on the other program i wrote for this device it has a length of 1 for each bit that is sent according to the monitoring program so 50 is the first code send and the program says Length 1: 50 when i send it using the vb comm control it says Length 2: 50 and i am sure this is why it is not working. i cannot find the origional code i used to write this program so if anyone can help me. the information is send as hex codes and i cannot figure out how to send hex codes as vb seams to send them as ascii. i would value any help anyone can give.
thank you
on the other program i wrote for this device it has a length of 1 for each bit that is sent according to the monitoring program so 50 is the first code send and the program says Length 1: 50 when i send it using the vb comm control it says Length 2: 50 and i am sure this is why it is not working. i cannot find the origional code i used to write this program so if anyone can help me. the information is send as hex codes and i cannot figure out how to send hex codes as vb seams to send them as ascii. i would value any help anyone can give.
thank you
ASKER
hi i have my device which is a motor controller, and the software i already have sends 50 to it. i also have software monitoring the com port which says that the length of that 50 is 1, where as when i send the 50 in vb it says the length of the string is 2 as in a 5 and 0 not 50, i am sure that it is something to do with hex but i have tried &H50 and the device does nothing though i have not checked the monitoring program yet.
the origional program was written in delphi about 4 years ago but i have lost the source code for it.
thank you for your response
the origional program was written in delphi about 4 years ago but i have lost the source code for it.
thank you for your response
Have you tried sending the result of Chr(&H50)?
cwi2k:
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ASKER
hi sorry none of those answers worked, what i did (after messing around with the code) was
can i get a refund
thanks anyway
can i get a refund
thanks anyway
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The format of the message sent is <length><command> and you are saying the length should be 1 and the command '50'. Are you sure you are not sending '5' and '0' (length 2). This might also explain you're ascii comment.