A little tip to make life easier. The output from the esp32 compiler is a 'little' verbose. It is possible to turn off some of the warnings. In your project directory/main Edit CMakeLists.txt At the end of the file add: target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-unused-variable) target_com...

This is some alternative code for WS2812 LEDs running on the esp32. Rather than the RMT based component (I get issues with this being deprecated...) I tried two alternatives - using the i2s hardware where I got 'reasonable' results. LEDs would set but occasional glitches ( I think the T1L time I got...

Please post your code - or a snippet showing the problem. SPI sends overwrite the sent data with values received by the sender (or 0 if there is no reply) - so you might need to just update the array values each time.. loop (forever) loop (i = 0.. 7) array[i] = val[i] send (array) delay(1s)

is the display component connected correctly?

I'm going to say 'maybe' - or I think/hope so...


Will play some more....

Looks a very neat idea. I tried with the esp32s3 board (parallel ILI9488) - and got many build errors. G:/Downloads/DisplayManagerDemo/main/esp-project.c: In function 'FCD_0fe41_gLCD_ILI9488__Initialise': G:/Downloads/DisplayManagerDemo/main/esp-project.c:2810:21: error: expected expression before '...

With a little bit of tuning - now working with a 1 metre strip (they turned out to be RGB as well) I hit a very strange effect. If if Refresh I do for a 0 bit. PORTD = ph; PORTD = pl; Then if I do the same for a 1 bit with a few nops. Then it is slower (for the 0 bit) than doing PORTD |= 0x80; PORTD...

Now tested with 2 LEDs and seems to work AOK (I have a few 'single' LEDs with nice sockets / plugs - so adding extra is easy!) - which bodes well for multiple.
I think I have a 1m of these somewhere (RGBW) - which I will try and find to test further.

Martin

Okay a bit of a play - and a version running on an 8MHz MCU. There is an issue - the pin used is hardcoded here as D7. If you want to change it then you'll need to change the output at the start of main (this sets the pin to be an output and should really be done by setting DDRx etc). And the occurr...

I've tested using an ATMega8 - running at 16MHz (with external crystal) - LED lights all good and at 8MHz (internal)- not good. Checking on a scope - the timings look 'out' when running at 8MHz - and in fact altering the clock speed - seems to generate the same number of nops (for example setting it...

Can you try the attached - just outputs a colour (255) to each of RG and B then repeats - note that if you don't have the RGBW variant (I don't) then setting W to 0 is okay... (Note I use D7 as the output pin - you'll need to change this to suit)
Martin