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Hi Andrew. Just to wrap this up, I can confirm that v1.4 seems to be working fine in UART mode with no dropped characters. Thanks for sorting this out so promptly.

With regards to the V1.3 display you have, I will email you shortly to confirm a solution.

That's great - thanks.

Hi Andrew. My tour of all your display modules continues..... I dabble a bit in building retro computers on breadbaords using 1970s/80s chips. I checked out the manual for this display and spotted the following quote in the Terminal Mode section: " In this mode the SmartLCD will automatically displa...

Since I commented out the dispType command the cursor direction hasn't flipped. Looking at several of your example programs I see that the dispType command was never included, which poses the question why I put it in? I have been looking back through the versions of the larger program I was working ...

One thing about your sketch, and sorry if you’ve mentioned this previously, but the first line after the init is setting the display type to 20x4. Has that always been in your sketch? Yes. I have a dedicated breadboard setup and programs for my 2004 display testing and the code defining the display...

I managed to grab an hour to do the tests. I loaded a program to just set the SDA and SCL pins high. With the 2-channel level-shifter I have been using, the ESP32 side was 3.290V, the LCD side was 4.675V. This was with an actual 5V supply measurement of 5.059V. So, the LCD side voltage was looking l...

The issue is the cursor direction is sometimes being set to right to left. I.e. bit 0 of register CR2 is being. Yes This only happens occasionally and only whilst uploading a sketch It happens most of the time with one of the displays. It has only happend so far when uploading a sketch, but then my...

I hooked the display up to a Uno and after several downloads it was still working OK. I unplugged the display from the Uno, connected it to the ESP32, downloaded the program and the direction flipped. Then something weird happened..... One thing to keep in mind though, is it’s one of the few registe...

One thing to keep in mind though, is it’s one of the few registers that when updated gets stored to NVRAM. So if at any point the cursor dir bit gets set, it will remain set even after reset or power is removed from the display. Just something to keep in mind while you’re trying to get to the botto...

I took delivery of a couple of these displays last week to build some hand-held battery-powered controllers for use outdoors and the Hello World example is working well with HCDisplay library + ESP32 + hardware SPI. The display is very clear despite the current overcast weather conditions!