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So just to follow up on this, I’ve taken a look and I have been able to replicate what you are reporting. I’ve pinned the issue down to a problem with the firmware, in particular it is being caused by a change to a UART library that caused the serial buffer to be cropped to 50 bytes. This change see...

Hi Roger, Although the display can handle serial data at various BAUD rates it is limited to how fast it can write the data to the display. With it being a character LCD this is of course relatively low compared to the BAUD rate. It does however have limited serial buffer. So as long as the buffer d...

Great work and thank you for taking the time to support these products. I've now added the link for your github page to the first post of this thread and the RGBW thread.

Anyway, things are working OK at the moment after several downloads. I will let you know if that changes. Great. There is still some odd issue going on with it and with your specific setup but as it’s not necessary hopefully omitting it solves your issue. Tbh, the only reason why that command exist...

Yes. I have a dedicated breadboard setup and programs for my 2004 display testing and the code defining the display type has been in from the start. At one stage I did put delays in the setup code between all the display-related commands in case the issue might be with busy states not being handled...

Yes. I think the other thing we should not loose sight of is that power cycling the board with ESP32 is resetting the cursor direction bit. That’s a good point, I missed that one. I’ll add it to the list. With the 2-channel level-shifter I have been using, the ESP32 side was 3.290V, the LCD side wa...

I’m afraid there is no python module currently available. You could first try the following code to see if your pico is seeing the display. import machine # Create I2C object i2c = machine.I2C(0, scl=machine.Pin(17), sda=machine.Pin(16)) # Print out any address found devices = i2c.scan() if devices:...

Thanks again for the answers. This conversation is getting a bit long so just for myself I’m going to summarise the issue: The issue is the cursor direction is sometimes being set to right to left. I.e. bit 0 of register CR2 is being set. This only happens occasionally and only whilst uploading a sk...

Hi Roger, I have no idea why it would be doing that. Changing the cursor direction requires a specific write to the display's control register 2. That register only handles the display size and cursor direction so unless there is a need to specifically write to that register then it shouldn’t get ch...

. So, I am beginning to think the problem may be with my breadboard set-up. Maybe a slightly iffy jumper cable or a breadboard glitch. Anyway, all is working now, so I hope you haven't wasted any time on this. Ah ok, and no problem at all. I'll get the updates to this library and the smart LCD libr...