HyperSPI on ESP32 MH-ET Live (CH9102x)

[ghost]

Good day dear @awawa-dev

I ordered all the necessary components for the assembly of the highlight.
Bought on your recommendation:

• Raspberry pi 4 1Gb
• Ezcoo ‎EZ-SP12HAS
• USB grabber MS2130
• ESP32 MH-ET Live (MiniKIT v2.0)
• Level Shifter (SN74AHCT125N)
• WS2812B

Dupont connecting wires will not exceed 10 cm (if I'm not mistaken should not exceed 15)
All modules will be located in one box (as in your blog).

[awawa-dev]

Hey

1. The level shifter from the diagram is not intended for Neopixel LEDs. You should use this: https://github.com/awawa-dev/HyperHDR/wiki/Level-Shifter
2. Precompiled firmware is already available in the release section, you don't need to compile your own: https://github.com/awawa-dev/HyperSPI/releases Unless you want to change the pinout for some reason, but that's not recommended. If you choose to do this, your approach is correct, with these lines to be commented out only in the HyperSPI_esp32_Neopixel.ino schema.
3. You need a common ground between the esp32 (or levelshifter) and the LED power supply, which is included in your schematic. But you also need common ground between ESP and Rpi. I recommend using a short ground between their pinouts like you connect their SPI interfaces. The USB cable between the Rpi and the ESP should also provide this, but in some cases it may not be enough for a stable SPI connection.

[awawa-dev]

Just pay attention to the right segment: the arrows on the LED strip should be directed in the opposite direction, and consequently: +5V and ground should also change their position accordingly on the second segment. Such a configuration as in the current diagram is of course also possible, but the input data for the second segment should be in the middle of the upper edge.

[ghost]

It's just that in the Fritzing editor it turned out to draw like that :)
From the commentary to the release, I understood how the ribbon should be located.
It was just easier to redraw this part in the editor in this way.
Updated the picture.

[awawa-dev]

Excellent! May I ask you as the author to create two PR and add this image to readme.md in HyperSPI (around 154 or 169 line) and HyperSerialESP32 (around 91 or 107 line). Add new lines around the pictures if necessary to separate it from the text.

[ghost]

Ready. For a long time, of course, I did not use Git, I again remembered how to correctly send a signed commit :)

[awawa-dev]

No problem :) PR are already merged.

[ghost]

Good afternoon dear @awawa-dev

I assembled a level shifter and an Esp32 on the same board like you have in your blog.
In some manuals for LED strips, it is recommended to install resistance on the Data line.

Adding a 300 to 500 Ohm resistor between your microcontroller's data pin and the data input on the first NeoPixel can help prevent voltage spikes that might otherwise damage your first pixel. Please add one between your micro and NeoPixels!

Is it really necessary or everything works without it.
I already have a 470 Ohm resistance, I don’t know if I need to install it or not)