Syncing with Z-Uno always failed when burn boot loader

[sdtlee]

Hello everyone,

I am new to Z-Uno and I just got my Z-Uno 2 rev 6 board today.
I followed the Arduino installation instruction here (https://z-uno.z-wave.me/arduino-install/).
I installed Arduino 1.8.19 by downloading directly (not through Microsoft Store App).

In Arduino board manager, I installed Z-Uno2 3.0.7.

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The Z-Uno 2 is recognized as COM Port 4.

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When I try to burn boot loader, it shows "Syncing with Z-Uno ('RST' btn?) [ *]" and after around half minute it failed.

Code: Select all

*** ZME Z-UNO G2 preprocessor. Platform:Windows Version:0.37b8 ***
BOOTLOADER
Openning port                            ..............................                            OK
Syncing with Z-Uno ('RST' btn?) [  *]    ..............................ブートローダの書き込み中にエラーが発生しました。
Syncing with Z-Uno                       ..............................                        FAILED

Error  0	 Can't sync with Z-Uno bootloader. It doesn't respond!
Closing port                             ..............................                            OK

Error  1	 Can't request board information! ErrCode=-1

In addition, I have also tried the Z-Uno2 (Beta) 3.0.9 and same error occurs.

Anyone has experience on this issue and know how to solve it?

Thank you in advance.

Regards,
Lee

[PoltoS]

Please try;
1) press RST while "Syncing with Z-Uno ('RST' btn?) [ *]" is shown
2) Try the Rescue mode https://z-uno.z-wave.me/getting-started ... Z-UnoHangs

[sdtlee]

Hi PoltoS,

Sorry for the late reply.
I have been busying on other project last few days.

I am not sure why that I can write the bootloader again after not touching the Z-Uno at all for almost a week.

However, after a few sketch deployment through Arduino, the board became unstable again and the same message "Syncing with Z-Uno ('RST' btn?) [ *]" appear again.

I have tried on both Windows and Mac, both with the same result.
But my another Z-Uno board does not has this problem.

Anyway I can check if there is hardware problem?
I have already tried both methods you provided:
1. Press RST button when "Syncing with Z-Uno ('RST' btn?) [ *]" appeared
2. Rescue mode
and in addition, I also tried "Device reset" (But the LED did not blink at all)

Regards,
Lee

[sdtlee]

Here is some additional information:

1.
I can get board info through Arduino Menu.
BN: Z-Wave>ME Z-Uno2
VID: 10c4
PID: ea60
SN: 40875dc1d4e9ea11839f6e80e9d60aec

2.
When plug with USB (Power on), I can confirm the 3.3V and 5V pin are outputing that voltage by oscilloscope.

3.
When plug with USB (Power on), all LED does not turn on or blink.

4.
When press down the Service button pin 23 goes to low (0V), and it goes back to high (3.3V) when releasing the button. (By oscilloscope)

[PoltoS]

Looks like a power-off during the firmware upgrade. If you have not yet upgraded the firmware, this might be ESD that killed the board.

It is not blinking with green, so the firmware on the Z-Uno is not working ;(

[sdtlee]

Hi PoltoS,

After a long time of leaving the Z-Uno alone (without connecting any power to it), the Z-Uno is back to work for about 30 minutes and no longer work again.

What it happened is that:
1. Last time (about 2 months ago) even when I connect the USB to power on, the Z-Uno LED does not turn on.
2. I gave up and leave it in storage for 2 months.
3. This morning, I plug the USB again and the LED turns on.
4. I can successfully run rescue mode. (Service + Rst button for 1 sec and release, red led turns on)
5. I can successfully run device reset. (Service button for about 5 secs and triple click on service button)
6. Try to burn boot loader from Arduino and succeed.
7. Try to burn an blank sketch to it and it succeed.
8. I leave it power on for about 20 minutes, the devices seems to be turned off.
9. The device back to step 1 like 2 months ago. The Z-Uno does not response even pressing the reset button, rescue mode or device reset.

Do you have any ideas about it?

And one stupid question is that I discover that the parts next to the USB is not in the same direction with the other device that works well.(I think it does not matter, but just in case).

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[7Cv0Nu6Q]

Facing the same issue now.
Z-Uno 3.0.9
Sketch was running for a few days without problems - today the node was gone and the device did not show any LEDs anymore.
Left it sitting without power for a few hours and was able to get serial messages after that.
Tried uploading a slightly modified sketch - the device is now dead again.
I can't burn the bootloader (same message as above) & I don't receive any serial messages. No LEDs are lit.

I am still able to open a Serial port without problems, but I receive nothing there.

Of course I tried rescue mode & factory reset.

[7Cv0Nu6Q]

Sometimes the Z-Uno blinks the green LED, but it is very irregular and the board does hardly ever accept sketch/bootloader updates.
It seems as if the Z-Uno is quite busy with itself, as it shows the same behaviour with bare minimum sketches as well (one can upload them with much patience and a huge portion of luck).

The 300T thing is facing "the wrong way" on my Z-Uno as well, btw.

[PoltoS]

Hello!

Looks like a h/w issue. In which country are you located and where you bought? We can swap it with a new one and take this for experiments.

[7Cv0Nu6Q]

Hello!

Looks like a h/w issue. In which country are you located and where you bought? We can swap it with a new one and take this for experiments.

I am located in Austria and bought it here (Poland): https://botland.store/z-wave-executive- ... 90037.html