I am hoping they will just replace the whole daughter board combination of TFT display and nano board. If I upload Blink the status message says it transferred properly but on a power cycle restart the display comes up blank anyway. The USB comm portion seems like it is working with a valid transfer status message on the upload there is just no display. With no detailed tech info on programs or processes of diagnostic nature or configuration software to run from the laptop the only logical conclusion is that the display itself is what is defective It appears.

If I was familiar and experienced enough to be able to run some sort of other program modules like settings manager or memory manager or any other types I might be better able to come up with better half-split diagnosis. Like if I could load up a program and run it in say something like a single step or debug mode and get some feedback on statuses of what components were working and what wasn't that would be helpful. The only thing the Arduino GUI tool does is upload, which is apparently working to get hex code into memory but no associated GUI on the laptop to get any feedback.

Hi Andy,

The default "Blink" sketch built into the Arduino IDE blinks the LED on pin 13 of the Arduino Nano, not the TFT screen. I'll take a stab and figuring out the white screen stuff tonight and will report back if I figure out a software-based fix.

In the mean time, since you can upload code, can you try uploading either Ashhar's master branch, or my pdq_gfx_update branch? In my experience, after uploading new code, the arduino resets and then the screen works.


Reed

Andy,

Are you sure that your nano is broken? On my bench setup,? my screen comes up all white fairly often, but not every time. In fact, whenever I reset the nano, the screen works, so I don't think it's a broken nano at this point, but rather a power sequencing issue of some sort. If this is the case, then it may not matter how many nanos you try.


Reed

Andy,

If downloading firmware to the uBitx, not a bad idea to have a few spare Nano's handy:
? ??
Do buy a Nano without pins yet soldered in place as per that Elegoo product,
since to mount it into the socket provided on the Raduino, the Nano pins must be soldered on the?
top side of the Nano, not the bottom where normal people put them.

Having spare Nano's, you can practice downloading firmware without even touching the uBitx.
Once it is downloaded, can power everything off and with proper anti-static precautions,
move the new Nano into the socket on the Raduino to try the firmware out.
If the uBitx doesn't work, you can go back to the original Nano, see if that fixes it.

Having spare Nano's also means you can play with them on other projects.
They are very useful and fun.? You might get a few of the cheap 16x2 displays also.

Many have noticed that the uBitx receiver works with the uBitx power switch off
when a USB connection from a host computer to the Raduino is made.?
The power from the USB connection goes "backwards"
through the LM7805 regulator up into the main 12v rail of the uBitx.
Though that 12v rail only has something less than 5v on it, the receiver
behaves more or less normally.? It is possible that this could blow some 5v connection
on a Nano due to too heavy a current, though I'm not sure anybody has experienced this.
Might be best to add a 1n400x diode between the main uBItx 12v rail and the LM7805
regulator on the Raduino to prevent the backward flow of current from the USB connection.?

I don't know why your uBitx failed.
At $3, the Nano clones are of variable quality, perhaps it simply died for no particular reason.
With any luck, replacing the $3 Nano (after first burning appropriate firmware) will fix your uBitx.

Jerry, KE7ER

On Tue, Jan 7, 2020 at 11:28 AM, Andy_501 wrote:

I have a dedicated 12 VDC @ 6 Amps supply for the uBITx transceiver with no other load on it.? The only thing I noticed in past sessions after connecting to laptop via USB port was that if I shut off the ON/OFF Vol control it stays powered up if the USB connection to laptop is live.

Everything was working fine as I indicated and I just powered it down for the night, as I had done many times before, and it did not start when I returned today. That is why I thought maybe the experimenting with the Xloader and or arduino uploading had somehow done a bad load just blanking all previous code. I don't have a h/w reset button on his one; I would need some sort of diagnostic program to run on laptop that could comm with USB port and do a reset via comm port I think but that would have to be a different program as well.

Something like this isn't great for teaching students in a course especially when cost is as high as it is.

?

On January 7, 2020 at 9:58 PM Reed N <greenkid336600+groupsio@...> wrote:


Hi Mark,

I'm reluctant to accept PRs into the pdq_gfx_update branch until Ashhar gets it merged into his master, since it's usually best practice to keep each PR focused on a single change, but I'd be very interested in seeing your interrupt-based encoder branch, and definitely would recommend you create a PR for it to be merged into Ashhar's master after the pdq_gfx_update is merged in.

Reed

Vince,

That's a valid concern. I would expect that anybody who sent a
hashtag-less email would get an immediate reply from the server telling
them they need to re-send their email with a hashtag in the subject
line, but if the server drops the message silently, that would be a real
problem. I don't know which of these scenarios is the real one, but it
would definitely be good to find out before turning that feature on.


Reed

Perhaps requiring at least one hashtag could improve people's
experience, since it would inspire people to at least choose something
relevant to their topic, and thus give others the opportunity to filter
somewhat? Currently there are lots of threads with NO tag, and since we
can't add them after they're made, there's no way to filter those
threads at all.

From /static/help:

Requiring hashtags: In a group set to Hashtags Required, all
messages sent to a group must be tagged with at least one hashtag.


Reed