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21 changes: 21 additions & 0 deletions LICENSE
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MIT License

Copyright (c) 2020 awawa-dev

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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The above copyright notice and this permission notice shall be included in all
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
165 changes: 165 additions & 0 deletions MakunaNeoPixelBusLicence.txt
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GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007

Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.


This version of the GNU Lesser General Public License incorporates
the terms and conditions of version 3 of the GNU General Public
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65 changes: 65 additions & 0 deletions README.md
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# HyperSerialESP32

Exposes USB high speed serial port at 2Mb baud for driving led strip using NeoPixelBus library. It's intended to replace slow Arduino solutions (level shifter 3.3V to 5v may be required). **Data integrity check (Fletcher's checksum) included in new 'Awa' protocol for HyperHDR. So no more random flashing caused by serial transmission errors.** That option must be checked in HyperHDR to make system works as on the screen below.

**Make sure that your serial chip on the ESP32 can handle 2Mb speed: for example CP2102 can't as its max speed is 1Mb and you can compile a version for that speed but I think that's not the point, cheap CH340G can do it without any problems.**

There is also my fork named HyperSerialWLED available with the support for the AWA serial protocol at @2Mb speed for both ESP8266 and ESP32: https://github.com/awawa-dev/HyperSerialWLED Can't guarantee it will work as stable as HyperSerialESP32 because WLED has a lot of other things to do in the backgrounds (ex. handling Wifi) and timing control for the serial port could be at danger for larger number of LEDs. But you don't need to abandon all the benefits offered by the WLED which can be a big advantage for some users.

RGB to RGBW conversion is calibrated for the neutral white channel BTF SK6812 but it can be easily changed (for cool and warm temperature) in the code. Search for "color calibration". In HyperHDR use "1.5" gamma for red, blue and green for best effect in the "Image Processing" tab.

# Data integrity check

Why the data integrity check was introduced which causes incompatibility with other software? Because at 2Mb speed many chip-makers allow few percent error in the transmission. And we do not want to have any distracting flashes. Broken frames are abandon without showing them. At 100Hz for 250 leds approximately 1-5% of the frames are broken.

# Flashing

For **RGBW LED strip** like RGBW SK6812 NEUTRAL white choose: *HyperSerialESP32_SK6812_NEUTRAL_WHITE_FIRSTLED_xxxxxx.bin*

For **RGBW LED strip** like RGBW SK6812 COLD white choose: *HyperSerialESP32_SK6812_COLD_WHITE_FIRSTLED_xxxxxx.bin*

For **RGB LED strip** like WS8212b or WS8213 choose: *HyperSerialESP32_WS821x_FIRSTLED_xxxxxx.bin*

For **SPI driven RGB LED strip** APA102: *HyperSerialESP32_APA102_FIRSTLED_xxxxxx.bin*, WS8201: *HyperSerialESP32_WS8201_rbg_FIRSTLED_xxxxxx.bin*

If the first LED in the strip should be enabled or set to black is your choice.
For the RGBW firmware the white channel is automatically calculated and R,G,B channels are corrected.
esphome-flasher is recommended.

# Usage in HyperHDR

Watch out for latch time, don't go above 15ms as it will affect communication performance.
Switch to "Expert" level settings to have all following options visible.

![obraz](https://user-images.githubusercontent.com/69086569/130987180-f12fb88e-850a-4fc3-8ea8-3579d900059a.png)

# Compiling

Compile the sketch using Arduino IDE. You need:
- https://github.com/espressif/arduino-esp32 (boards for ESP32)
- Makuna/NeoPixelBus (install from Arduino IDE: manage libraries)

**Options (first lines of the sketch):**

For RGB strip like WS8212b comment it, leave it for RGBW SK6812:
*#define THIS_IS_RGBW*

Skip first led in the strip, that is used as level shifter:
*bool skipFirstLed = true;*

Serial port speed:
*int serialSpeed = 2000000;*

Don't change LED's count as it is dynamic.

# Pinout

**ESP32:**
**LED output (non-SPI):** GPIO 2
**LED output (SPI):** GPIO 0 for Clock, GPIO 2 for Data

# Disclaimer

You use it on your own risk.
Don't touch these firmwares if you don't know how to put the device in the programming mode if something goes wrong.
As per the MIT license, I assume no liability for any damage to you or any other person or equipment.
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