Troubleshooting • Raspberry Pi 3 trying to control a strip of WS2811 LED's

Code:

# to start pigpiod manually - sudo systemctl start pigpiodimport pigpioimport timeimport subprocess# ConfigurationLED_PIN = 12  # GPIO 12 (pin 32) - WS2811 dataNUM_LEDS = 5  # Set to 20 as per requirementSLEEP_TIME = 3  # Time to keep LEDs on# Ensure pigpiod startsdef start_pigpiod():    # make sure only 1 instance of pigpiod is running    subprocess.run(["sudo", "pkill", "pigpiod"], check=False)  # Kill existing daemon    subprocess.run(["sudo", "pigpiod"], check=True)    time.sleep(1)  # Wait for pigpio to start# Function to create WS2811-compatible bitstreamdef encode_ws2811_byte(byte):    # Converts a byte (8 bits) to the WS2811 waveform:    # - A '1' bit is ~0.85µs high, ~0.4µs low.    # - A '0' bit is ~0.4µs high, ~0.85µs low.    bits = []    for i in range(8):        if (byte & (1 << (7 - i))) != 0:  # Bit is 1            bits.append(pigpio.pulse(1 << LED_PIN, 0, 800))  # High for 0.8µs            bits.append(pigpio.pulse(0, 1 << LED_PIN, 450))  # Low for 0.45µs        else:  # Bit is 0            bits.append(pigpio.pulse(1 << LED_PIN, 0, 400))  # High for 0.4µs            bits.append(pigpio.pulse(0, 1 << LED_PIN, 850))  # Low for 0.85µs    return bits# Function to send WS2811 datadef send_ws2811_data(pi, led_pin, led_data):    pi.wave_clear()  # Clear previous waves    pulses = []    for color in led_data:        grb = (color[1], color[0], color[2])  # Convert RGB to GRB        for byte in grb:            pulses.extend(encode_ws2811_byte(byte))    # Add a reset pulse (50µs low)    pulses.append(pigpio.pulse(0, 1 << led_pin, 50000))    # Create and send the waveform    pi.wave_add_generic(pulses)    wave_id = pi.wave_create()    if wave_id >= 0:        pi.wave_send_once(wave_id)        while pi.wave_tx_busy():            time.sleep(0.001)  # Wait for completion        pi.wave_delete(wave_id)# Main programtry:    start_pigpiod()    pi = pigpio.pi()        if not pi.connected:        print("Failed to connect to pigpio daemon")        exit()    RED = (255, 0, 0)  # RGB (Will be sent as GRB)    OFF = (0, 0, 0)    print("Turning on 5 LEDs RED")    send_ws2811_data(pi, LED_PIN, [RED] * NUM_LEDS)    time.sleep(SLEEP_TIME)    print("Turning LEDs OFF")    send_ws2811_data(pi, LED_PIN, [OFF] * NUM_LEDS)    input("Press Enter to exit...")except KeyboardInterrupt:    print("Stopping...")finally:    send_ws2811_data(pi, LED_PIN, [OFF] * NUM_LEDS)  # Turn off LEDs    pi.stop()    subprocess.run(["sudo", "systemctl", "stop", "pigpiod"], check=True)    print("pigpiod daemon stopped")