RGB led

rgbled.py

###USAGE###
# pip3 install makeblock --upgrade
###########
from time import sleep
from random import random
import math
from makeblock import MegaPi,SerialPort
A6 = 60
A7 = 61
A8 = 62
A9 = 63
A10= 64
A11= 65
A12= 66
A13= 67
A14= 68
A15= 69

megapi = MegaPi.connect() # or megapi = MegaPi.connect(SerialPort.connect("/dev/ttyXXXX"))
led = megapi.RGBLed()
j = 0
f = 0
k = 0
pixels = [0]*12
while(1):
  for t in range(0,4):
    pixels[t*3] = int(16 * (1 + math.sin(t / 2.0 + j / 4.0)))
    pixels[t*3+1] = int(16 * (1 + math.sin(t / 1.0 + f / 9.0 + 2.1)))
    pixels[t*3+2] = int(16 * (1 + math.sin(t / 3.0 + k / 14.0 + 4.2)))
  led.set_colors(pixels,A10)
  j += random()
  f += random()
  k += random()
  sleep(0.01)

Hey, I'm excited to see your post, I'm also trying to control an mBot Mega with a Pi 4 (via USB). The results I'm getting are very inconsistent and the makeblock support seems light to non-existent. Are you still working on this? I'd appreciate any insights that you might have. TIA, Ken

Just an update from my experience that may help others.
I found that the A13 RGBLED does work and it's the A14 RGBLED that doesn't. I'm not currently using any of the other devices connected to A6 thru A15 so, I moved the RGBLED from A14 to A12 and now both RGBLEDs work fine.
Note that I am using the "Firmware for Megapi" version 0e.01.018. I've downloaded the source ( https://github.com/Makeblock-official/Makeblock-Libraries/blob/master/examples/Firmware_for_MegaPi/Firmware_for_MegaPi.ino ), compiled it (via the Arduino IDE) and uploaded it to the mBot Mega.