Nick B
Good news!
Works a treat with the nice level adapter card (whose pins line up conveniently). No changes to the uTracer PCB - just remove the MAX232 and use a pin header for 16,15,9 & 10. Don't seem to be any SMPS interference issues. I'm using Windows 7 64 bit with my laptop's built-in BT adapter - I tried a cheap dongle on a standard W7/64 mini-tower and windows didn't like the adapter, so if you don't have a built-in one, I'd use a decent quality dongle...
For the record, I was using this BT serial board : http://www.ebay.co.uk/itm/151057036889 and this 3.3V/5V level changer (make sure you connect the 3.3V side to the BT serial board!) : http://www.ebay.co.uk/itm/251208215004 . The BT board bonds with a default code of "1234" and serial characteristics of 9600,8,1,N.
Full galvanic isolation and remote access for about USD15./ GBP 10 :)
Hope you find this useful (and a way of protecting those expensive computers!)
Nick (de Smith)
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Duane
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Here's an alternative to those usb to serial adapters: Bluetooth to serial. I just ordered one to try out for $7. Goodbye pesky wires!
I'll let you know how it works out.Nick B
The EOF (end of file) character. Receipt of this character marks the end of the input stream.
So, probably that "improvement" in the newest firmware of HC-06 ("– nl/cr line endings not required") messes up the whole thing.
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So you get the correct data from the HC-06 into the µTracer, and you get the proper response from the µTracer as long as its TxD is open. And as soon as you connect TxD to the HC-06 you get weird stuff coming out of the µTracer -- correct?
Is it possible that some kind of local echo is enabled for the HC-06? In that case is would echo back the bytes sent by µTracer, who would interpret this echo as another command and send an additional response, etc. I.e. does the data on the RxD line change when you connect TxD?
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
or if you split it:
-the app initializes the utracer and wants to get some info from it
00000000008F08080850000000000000000000000000008F080808500000000000000000
-I am sending the wrong response and the app is happy and let me put the heater voltage
00000000008F400808500000000000000000100000000000000000000000FF0388000000FF
-the app puts the heater voltage:
400000000000000052
does not even check if it was successful or not
-the app runs the quick test for tubes:
100046004600450052
-I respond with the wrong echo and the measurements:
10005C005C00990052100000000000000000000000FF0388000000FF
-the app is happy with the wrong response and sends another response like that because the measurements are repeated a few times:
100048004600450052
-gets back again wrong echo
10005C005C00990052100000000000000000000000FF0388000000FF
and so on
100043004600450052
10005C005C00990052100000000000000000000000FF0388000000FF
100046004800450052
10005C005C00990052100000000000000000000000FF0388000000FF
So this is what I meant by quality: there is no error correction or detection implementation in that app. If some communication, as you mention, gets corrupted, the app can apply all the 450V and think that it is a measurement for 10V or so.
I see if I can dig into the problem with the real communication between the app and the uTracer through that HC-06 and will report what was wrong in my case.
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Unzip the downloaded uTmax.zip into your home directory i.e. /Users/YourName/. This will create a folder named uTmax_files.
In the folder utMax_files\uTmax_program_files, you will find the executable uTmax.exe. You can create a shortcut and add to your Start menu, if you wish.
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On Jan 16, 2020, at 10:47 AM, BHdeC <norman...@gmail.com> wrote:
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