LCD refreshes on reset only?

[apluck]

Hi, 1st of all, Greig, thank you for adding the LCD module, I can see this being extremely useful.

I just tried it on a genuine Uno with genuine ethernet shield. There is nothing else on this board.

I added the LCD pin, and tried sending some text. The LCD only refreshes when I press the reset button on the Uno. If I change the text in HS and press submit nothing happens.

A couple of times, the display has refreshed at about 1 character per second with garbage.

Then when I reset the board, it displays the correct text.

I am using plugin v85 with v84 sketch.

cheers,
Al

[enigmatheatre]

Hi Al.

I would first suggest upgrading to the v99 plug in as there is a lot of LCD changes from v85.

Greig

Sent from my SM-G925F using Tapatalk

[apluck]

Will do - thanks Greig. Is the v99 plugin backwards compatible with the v84 sketch for inputs, outputs, PWM and Onewire, or do I need to update all the boards at the same time?

cheers,
Al

[enigmatheatre]

Unfortunately you will have to update as there is changes in the board sketch that may stop things working.

Greig.

Sent from my SM-G925F using Tapatalk

[apluck]

I upgraded to v99, and still the same issue. It could be a fauly LCD module I suppose, but what failure would cause it to only work when reset.

If I send text to the LCD, then after about 1 minute, the board goes "disconnected" and needs a reset to reconnect.

[enigmatheatre]

What board are you using and what pins are connected? Also what is written on the LCD driver on the back.

Greig.

Sent from my SM-G925F using Tapatalk

[apluck]

Hi Greig, hopefully this photo tells all.

[enigmatheatre]

Ok this all looks fine to me.
Can you remove the LCD from the plugin by pressing the red x on the config screen then add it again as I am not sure the changes in .99 have stuck. If this is not working can you get me a debug log with you setting one of the lines to the word "Test" and then send it to me so I can see what is going on.

Greig.

[apluck]

I tried that, and also removing the board and re-adding it. Still the same problem.

I've attached a debug file. The LCD is board 4.

I started logging
reset the board
sent "test" to line 1
waited until it had "Connection Failed"
stopped logging.

Thanks,
Al

[enigmatheatre]

Hi Al,

I am at work at the moment so just had a quick look. It looks like the board watchdog is not starting and it is getting confused. Can you try adding 1 input and 1 output and then try the lcd to see if this kicks it in to life.

I will have a deeper look when I get 5min.

Greig.

[enigmatheatre]

Al.

If you do not mind can you send me the sketch you uploaded to the board to.

Thanks

Greig.

[apluck]

This old problem has resurfaced for me on v129.

The LCD has been happy working for a year, (not sure what sketch version, might have been earlier than v129). I uloaded a v129 sketch over the weekend, and now the board refreshes the LCD once on startup and then disconnects a minute later. If I remove the LCD pins in the plugin, then then board stays connected.



Debug log attached. The LCD board is Board5.

[apluck]

Anyone else had this issue? Is it fixed in .131?

[apluck]

I upgraded to .131 but still does the same.

Greig, we exchanged emails about this in Dec 2015, but I can't see how we resolved it - whether it just started working, or whether I had to modify the sketch.

Can you remember?

[enigmatheatre]

I upgraded to .131 but still does the same.

Greig, we exchanged emails about this in Dec 2015, but I can't see how we resolved it - whether it just started working, or whether I had to modify the sketch.

Can you remember?

Did you not have to add in input and output pin or something strange like that? Is the LCD Address correct?


Greig.