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Trying to connect over USB, but new 6.4 connects and disconnects a few seconds later.

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MaxMaker1
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Trying to connect over USB, but new 6.4 connects and disconnects a few seconds later.

I tried this on a MAC and a PC with VESC 0.94. It connects to both, but disconnects about 5 seconds later. The blue LED turns off too. 

The Tool displays this message for a second or so: "Der E/A-Vorgang wurde wegen eines Threadendes oder einer Anwendungsanforderung abgebrochen."

                                   "The E/A process was aborted due to a thread end or an application requirement. "
 

MaxMaker1
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Here is some info from the Terminal: 

2018-05-25 01:23:05: VESC® Tool 0.94 started
2018-05-25 01:23:05: Status: Not connected
2018-05-25 01:23:23: Status: Connected (serial) to COM4
2018-05-25 01:23:23: Status: VESC Firmware Version 3.38, Hardware: 60, UUID: 47 00 33 00 02 51 36 34 35 36 37 39
2018-05-25 01:23:23: Status: MC configuration updated
2018-05-25 01:23:23: Status: App configuration updated
2018-05-25 01:23:37: Status: Serial port error: Der E/A-Vorgang wurde wegen eines Threadendes oder einer Anwendungsanforderung abgebrochen.
2018-05-25 01:23:39: Status: Not connected
2018-05-25 01:23:41: Status: Invalid serial port: \\.\COM4
2018-05-25 01:23:45: Status: Invalid serial port: \\.\COM4
2018-05-25 01:23:59: Status: Invalid serial port: \\.\COM4
2018-05-25 01:24:05: Status: Invalid serial port: \\.\COM4
2018-05-25 01:24:07: Status: Invalid serial port: \\.\COM4
2018-05-25 01:24:12: Status: Invalid serial port: \\.\COM4
2018-05-25 01:24:19: Status: Invalid serial port: \\.\COM4
2018-05-25 01:24:21: Status: VESC Firmware Version 3.38, Hardware: 60, UUID: 47 00 33 00 02 51 36 34 35 36 37 39
2018-05-25 01:24:22: Status: Serial port error: Ein an das System angeschlossenes Gerät funktioniert nicht.
2018-05-25 01:24:52: Status: Invalid serial port: \\.\COM4
2018-05-25 01:24:55: Status: Invalid serial port: \\.\COM4
2018-05-25 01:24:57: Status: Invalid serial port: \\.\COM4
2018-05-25 01:24:59: Status: Invalid serial port: \\.\COM4
2018-05-25 01:25:07: Status: Connected (serial) to COM4
2018-05-25 01:25:07: Status: VESC Firmware Version 3.38, Hardware: 60, UUID: 47 00 33 00 02 51 36 34 35 36 37 39
2018-05-25 01:25:08: Status: Serial port error: Der E/A-Vorgang wurde wegen eines Threadendes oder einer Anwendungsanforderung abgebrochen.
2018-05-25 01:25:10: Status: Not connected
2018-05-25 01:27:46: Status: Invalid serial port: \\.\COM4
2018-05-25 01:27:49: Status: VESC Firmware Version 3.38, Hardware: 60, UUID: 47 00 33 00 02 51 36 34 35 36 37 39
2018-05-25 01:27:50: Status: Serial port error: Der E/A-Vorgang wurde wegen eines Threadendes oder einer Anwendungsanforderung abgebrochen.

TechAUmNu
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Have you tried a different cable? How are you powering the VESC?

If the blue light goes out then its a power issue.

MaxMaker1
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I tried both, a lab power supply and 12s lipos. I tried it with and without my antispark and safety relay circuit. So without the relays and arduino it was just a direct connection to the bench power supply which can output up to 5A at 32V.  I tried it on two computers, PC and Mac, and with two different branded USB cables.

It also shuts down without the USB connection. The time is always different from 3-10seconds.  

Here is a video of what happens. https://youtu.be/CGZxkgRnqNs

Danny Bokma
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Please connect it directly to a power supply and nothing else, preferably share a video of the vesc the undesired behavior.

MaxMaker1
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I did! I tried really everything. Lipo, Bench power supply, with and without the fancy circuit. It is always the same result. 

Danny Bokma
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If it does this directly connected to a decent power supply (the one you described should be perfect) power supply then you VESC is broken. How far are you from the Netherlands? If claiming warranty becomes in issue I can maybe help you out. 

MaxMaker1
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Thanks. Frank from Trampa told me on the esk8 forum to test the 5v output and it only outputs 2.8v. I have a good feeling  they will Fix it. If not, Ill contact you again. I am from Hamburg. 

wdaehn
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I would have one suggestion: Disconnect the extra cables, hall sensor, uart, encoder or whatever else is connected at the moment. If there is a short circuit of some kind on the 5V line, you would have <5V on the 5V supply lines. 

Just for differential diagnosis.

 

MaxMaker1
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Thanks. I tried that already. 

Caustic_Zinc
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And how did it go?

Caustic_Zinc
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Increasing baud rate on VESC tool seem to solve the problem.

frank
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Be careful with ground loops! Sounds like you connected secondary devices to control your VESC. A ground loops can easily kill a voltage regulator. This is why I asked to masure the low voltage rails.