With Pizero W

[hoangphan]

hi @hzeller ,

first of all, i'm very grateful to see your contribution of such a great library.
i'm planning to use your library into some IOT project that can control RGB Panel wirelessly.

however, i'm stuck to make the led on and run your demo :) although i have studied your documentation very well.

can you please hint if this library works with PI ZERO W version 1.3?

for your information about my bench,

• Raspbian stretch lite 29-Nov-17
• Pi zero W version 1.3
• power supply 5V, current adjustable up to 30A
• PI connected with my MacbookPro via USB, SSH command line only, no GUI
• wiring from PI to LED directly as per the wiring table you shared. i didn't make any level shifter.
• RGB panel 64x64, with E pin in the pin 8. scan rate 1:32

any help would be highly appreciated :)
Hoang

[hoangphan]

Or did i miss to pull up the OE by 1K resistor?

[hzeller]

Pi zero w should work, but haven't tried it (sometimes Raspian messes up GPIO detection, but it should just be recognized as Pi1 internally)
Pull-up not really needed, only helps to not light up LEDs when GPIO is floating on reboot.

Usually, I would suspect the missing level shifter.

[hoangphan]

Thanks for your response!
i ordered the PCB and would have it by next Tuesday. Hopefully i have some good news for the PI zero W :)

[hoangphan]

@hzeller : In the meantime, i just took a close look to panel and see that i have 64x64 Led panel P3, with ICN2038 led drivers, and 74HC245. HUB75 has E line pin 8 as per what described as supported from your library.

with the 245, i tried to slow down GPIO and use 4V input (even lower), but without success.

with the ICN2038s, is there any one here success with it?

[hzeller]

I think there is some discussion over there on #466
It might need some smallish patch, but it is not quite clear yet if it will be the final thing.

[hoangphan]

@hzeller: i think this topic can be closed. Thanks very much for your support :)

a suggestion in the readme of your project: is to mention about the supported led drivers chip support (i think a poll around would help to consolidate this real quick :)

[andrei0807]

@hoangphan
How are you?
Are you fine with icn2053 chipset?
How did you patch library for icn2053?