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Serial Port Downloads to 41CL
02-24-2015, 09:11 PM
Post: #9
RE: Serial Port Downloads to 41CL
(02-24-2015 02:30 PM)rprosperi Wrote:  
(02-24-2015 09:18 AM)Frido Bohn Wrote:  Hi Robert,

What do you mean by?

COM1 is in use for another application than the serial connection to the 41CL I hope, otherwise addressing COM2 in the manual command you wrote wouldn't make sense.

I use the CLWRITER/CLREADER pair in Win7 and got it working, even without the inter-char delay option. Possible problems may come from the COM port settings in Win7 hardware settings, accessible e.g. via the "device manager". Just check the settings there and adjust them to the CLWRITER commands.
Have you tried the other way with CLREADER? May be worthwhile to look if sending of data to the PC works. You can also use a terminal program and check if it receives any signal from the 41CL.
Eventually, you may check whether there are some hardware issues, for example to look at the wiring of the 41CL. Does the COM port in the PC work at all?

Just a few ideas.

Thanks for the comments and suggestions Frido.

COM1 is already in use connected to my UPS, so I'm using COM2 for 41CL. COM2 is known to work OK.

Are you using 64-bit windows? If so, could you email me the 2 programs?

I did set Baud rate to 4800 in Device Manager. I assumed N-8-1 as well.

I will try uploading a file, an obvious and simple step I missed.

After that if the Python program doesn't work, a terminal program is next.


Are you sure that the cable and internal connections are working as they should?

It should not be necessary to do any setup in Device Manager, as CLWriter/CLReader both set up the serial port with 8 bits, no parity, 1 stop bit and no hardware handshaking.

You should also be able to compile the programs yourself – if you have the .NET runtime installed, the C# compiler should also be available. (That's one of the reasons that these two small programs are published as source; the other is that source code distributions are a bit safer than binary distributions – at least for trivial code like this.)
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Messages In This Thread
Serial Port Downloads to 41CL - rprosperi - 02-24-2015, 12:04 AM
RE: Serial Port Downloads to 41CL - rwiker - 02-24-2015 09:11 PM
RE: Serial Port Downloads to 41CL - rwiker - 02-25-2015, 05:40 AM
RE: Serial Port Downloads to 41CL - rwiker - 02-25-2015, 08:47 PM

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