NeoPixel with BluetoothClassic MicroPython

[PitGR]

Hello Pit again

Today is Valentine's Day and a few days before I started a new toy
I bought a NeoPixel 16*16 and I tried show text, icon, lines, rect, somethings
I'm using framebuf ; framebuf.FrameBuffer , format=framebuf.RGB565 and font https://github.com/micropython-Chinese-Community/mpy-lib/tree/master/LED/OLED_I2C_ASC
I know firmware by default it does not have from neopixel import NeoPixel then I was looking https://github.com/micropython/micropython-lib/blob/master/micropython/drivers/led/neopixel/neopixel.py

I made two codes.
First code

from neopixel import NeoPixel
from machine import Pin
from time import sleep
from micropython import const
import framebuf, math, array, gc

class NP(framebuf.FrameBuffer):
  def __init__(self, pin=15, width=16, height=16, color='red', format=framebuf.RGB565):
    self.n = width*height
    self.np = NeoPixel(Pin(pin, Pin.OUT), self.n)
    self.color = colors.get(color)
    self.screen = bytearray(1025)
    self.fbuf = None
    self.buffer = bytearray(width * height * 2)  # Cambia a 8 * 8 * 2 para manejar RGB565
    super().__init__(self.buffer, width, height, format)
    self.fill(0)
   self.show()

Second code

from neopixel16x16 import NP
from time import sleep
import bts, gc

gc.collect()

bts.init("NeoPixelBluetooth", "1234")
#print(bts.up())
np = NP()

while True:
  gc.collect()
  w = bts.get_str(bts.data()) 
  if w:
    data = w.split(',:')
    #print(data)
    if data[0].startswith('font'):
      np.scroll_text(f=int(data[0][4:]), msg=data[1], x=int(data[2]), y=int(data[3]), color=data[4], move=data[5], bright=float(data[6]), t=float(data[7]))
  elif data[0].startswith('icon'):
      pass

test1 work

from neopixel16x16 import NP
np.NP()
np.scroll_text(f=8, msg="Happy Valentine's Day", x=0, y=0, color='green', move='left', s=1, bright=0.5, t=0.2)

test2 work

import bts

bts.init("NeoPixelBuetooth", "1234")
#print(bts.up())

while True:
  w = bts.get_str(bts.data()) 
  if w:
    data = w.split(',:')
    print(data)

test3 mixed test1 with test2 not work

Guru Meditation Error: Core  1 panic'ed (StoreProhibited). Exception was unhandled.

Core  1 register dump:
PC      : 0x40097e76  PS      : 0x00060833  A0      : 0x80095d7b  A1      : 0x3ffcead0  
A2      : 0x00000106  A3      : 0xffffffff  A4      : 0x3ffe4d53  A5      : 0x00000000  
A6      : 0x00001a60  A7      : 0xffffffff  A8      : 0x0000abab  A9      : 0x0000cdcd  
A10     : 0x00060820  A11     : 0x0000abab  A12     : 0xb33fffff  A13     : 0x00060823  
A14     : 0x00000000  A15     : 0x00000003  SAR     : 0x00000006  EXCCAUSE: 0x0000001d  
EXCVADDR: 0x00000106  LBEG    : 0x400d8a09  LEND    : 0x400d8a62  LCOUNT  : 0x00000000  

Backtrace: 0x40097e73:0x3ffcead0 0x40095d78:0x3ffceaf0 0x400f76f1:0x3ffceb30 0x400dcb7a:0x3ffceb50 0x400e3c9a:0x3ffceb70 0x400e3dad:0x3ffceb90 0x40084b6d:0x3ffcebb0 0x400dcca2:0x3ffcec50 0x400e3c9a:0x3ffcec80 0x400e3cc2:0x3ffceca0 0x400ee2de:0x3ffcecc0 0x400ee471:0x3ffced50 0x400d650e:0x3ffceda0

ELF file SHA256: 000cee4e98d44d22

Rebooting...
ets Jul 29 2019 12:21:46

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:4396
ho 0 tail 12 room 4
load:0x40078000,len:13976
ho 0 tail 12 room 4
load:0x40080400,len:3332
entry 0x40080618

I think it's a memory limit but I have no idea. then I am back and flash esp32 with v1.22.0 (2023-12-27) .bin add Bluetooth HC-05 any problem, work.

I hope next time improve code and remove hc-05.
Thanks and Happy Valentine's Day.

See you soon with new toy of Pit

[jimmo]

@PitGR Sorry I'm a bit confused about what you're asking... neopixels (ws2812) don't use RGB565
Or do you also have a display, in addition to your neopixels?

[PitGR]

Hello jimmo, good afternoon.

I am using framebuf with constant RGB565 this I can make matrix n*m and save diferentes colors.
https://docs.micropython.org/en/latest/library/framebuf.html#module-framebuf

allow me to show and explain

from neopixel import NeoPixel  # Import NeoPixel class for controlling NeoPixel LEDs
from machine import Pin  # Import Pin class for GPIO pin control
import bts  # Import Bluetooth communication module
from micropython import const  # Import const module from MicroPython for constant definitions
import framebuf, math, array, gc  # Import various functionalities like framebuffer, math, array, garbage collection
from time import sleep  # Import sleep function for delaying

# Colors
BLACK = const(0x0000)
BLUE = const(0x001F)
RED = const(0xF800)
GREEN = const(0x07E0)
CYAN = const(0x07FF)
MAGENTA = const(0xF81F)
YELLOW = const(0xFFE0)
WHITE = const(0xFFFF)
ORANGE = const(0xFD20)
PURPLE = const(0x8010)
PINK = const(0xF81F)
LIME = const(0x07E0)
BROWN = const(0xA145)
GRAY = const(0x8410)

# Dictionary mapping color names to their RGB565 values
colors = {'black': BLACK, 'blue': BLUE, 'red': RED, 'green': GREEN, 'magenta': MAGENTA, 'yellow': YELLOW, 'gray': GRAY, 'dark': BLACK,
          'white': WHITE, 'cyan': CYAN, 'orange': ORANGE, 'pink': PINK, 'purple': PURPLE, 'lime': LIME, 'brown': BROWN}

class NP(framebuf.FrameBuffer):
    def __init__(self, pin=15, width=16, height=16, color='red', format=framebuf.RGB565):
        # Initialize NeoPixel object with specified parameters
        self.n = width * height
        self.np = NeoPixel(Pin(pin, Pin.OUT), self.n)
        self.color = colors.get(color)  # Get RGB565 value for specified color
        self.width = width
        self.height = height
        self.fbuf = None
        self.buffer = bytearray(width * height * 2)  # Change to 8 * 8 * 2 to handle RGB565
        super().__init__(self.buffer, width, height, format)
        self.fill(0)
        self.show()

    def clear(self):
        # Clear the NeoPixel matrix
        self.fill(0)
        if self.fbuf:
            self.fbuf.fill(0)
        self.show()

    def text8(self, ch='', x=0, y=4, color='red', s=1, bright=0.5):
        # Display an 8x8 character on the NeoPixel matrix
        color = colors.get(color)
        buffer = bytearray(16 * 16 * 2)
        self.fbuf = framebuf.FrameBuffer(buffer, 16, 16, framebuf.RGB565)
        self.fbuf.fill(0)
        self.fbuf.text(ch, 0, 0, color * s)
        for j in range(16):
            for i in range(16):
                rgb565 = self.fbuf.pixel(self.width - 1 - i, j)
                if j % 2 == 0:
                    self.pixel(i + x, j + y, rgb565)
                else:
                    self.pixel(self.width - 1 - i - x, j + y, rgb565)
        self.show()

    def show(self, bright=1.0):
        # Update NeoPixel LEDs with the buffer content
        for y in range(self.height):
            for x in range(self.width):
                if y % 2 != 0:
                    x = self.width - 1 - x
                i = y * self.width + x
                byte1 = self.buffer[i * 2]
                byte2 = self.buffer[i * 2 + 1]
                rgb565 = (byte1 << 8) | byte2

                # Extract RGB components from RGB565
                r = ((rgb565 >> 11) & 0x1F) * 255 // 31
                g = ((rgb565 >> 5) & 0x3F) * 255 // 63
                b = (rgb565 & 0x1F) * 255 // 31

                # Adjust brightness
                r = int(r * bright)
                g = int(g * bright)
                b = int(b * bright)
                self.np[i] = (r, g, b)
        self.np.write()

# Initialize NeoPixel object and Bluetooth communication
np = NP()
bts.init("BT_ESP32", "1234")

while True:
    # Check for incoming Bluetooth data
    w = bts.get_bin(bts.data())
    if w:
        w = w.decode('utf-8')
        data = w.split(',:')
        print(data)
        if data:
            # Display the first character of the second part of received data on NeoPixel matrix
            np.text8(ch=data[1][0])
            bts.send_str("Ready")

I used np.text8 saved self.fbuf.text(ch, 0, 0, color*s) and rewrite self.buffer after with show read two bytes the self.buffer and RGB565toRGB for neopixel.

When I try run only neopixel without BluetoothClassic this work, but I add BluetoothClassic and np.text8(ch=data[1][0]) somethings first time work I changed an other ch = 'C'. The chip panic all time.

['font8', 'Hello', '0', '0', 'cyan', 'left', '0.5', '0.2']
['font8', 'Hello', '0', '0', 'cyan', 'left', '0.5', '0.2']
Guru Meditation Error: Core  1 panic'ed (Load860  
A2      : 0x3f404010  A3      : 0x   : 0x00060020  A11     : 0x0000abab  A12    010  LBEG    : ce900 0x400e3dad:0x3ffce920 0x40084b6d:0x3ffce94:0x3ffceb70 0x40084ada:0x3ffceb90 0x400dcca2:0000cee4e98d44d22

Rebooting...
ets Jul 29 2019 12:21:46

rst:0xc (SW_CPU_RESET),b clock div:2
load:0x3fff0030,len:4396
ho 0 tail 12 room 4
load:0x40078000,len:13976
ho 0 tail 12 room 4
load:0x40080400,len:3332
entry 0x40080618
MicroPython v1.19.1-909-g36ae5d3e8-kaki5 on 2023-04-12; ESP32 BT-CLASSIC (KAKI5) with ESP32

It is not necessary to connect neopixel to see how it panics.

I'm sorry if my question is still learning to ask.

I need to know why the chip panics. I know that the firmware is directed for a bluetooth car but I want to control a NeoPíxel 16*16 with bluetooth if possible.

Thanks for help. I hope I have explained better

[jimmo]

Right. That extra context is helpful :)

What do you mean by "BluetoothClassic"? MicroPython doesn't support classic Bluetooth, only BLE.

[PitGR]

not officially but Sharitumin https://github.com/shariltumin/esp32-bluetooth-classic-micropython
I used this and I made Bluetooth car. This was fun. Now I want to make NeoPixel BluetoothClassic but the chip panic.
I add from NeoPixel import NeoPixel https://github.com/micropython/micropython-lib/blob/master/micropython/drivers/led/neopixel/neopixel.py for default firmware BluetoothClassic not have NeoPixel