Check your uPython version

[ehm.education]

from m5stack import *
from m5ui import *
from uiflow import *
import time
import uos

setScreenColor(0x000000)

vstart = None
vsysinfo = None
vsecs = None
vmins = None
vtimetext = None

battery = M5TextBox(0, 0, "loading", lcd.FONT_DejaVu18, 0xFFFFFF, rotate=0)
uptime = M5TextBox(0, 32, "loading", lcd.FONT_DejaVu18, 0xFFFFFF, rotate=0)
lb_sysinfo = M5TextBox(0, 64, "loading", lcd.FONT_DejaVu18, 0xFFFFFF, rotate=0)

import math

lcd.setBrightness(10)
vstart = time.ticks_ms()
vsysinfo = uos.uname()
lb_sysinfo.setText(str(vsysinfo))
while True:
  battery.setText(str((str(((str('Battery: ') + str((power.getBatteryLevel()))))) + str('%'))))
  vsecs = round(((time.ticks_ms()) - vstart) / 1000)
  vmins = math.floor(vsecs / 60)
  vtimetext = (str((vsecs % 60)) + str('s'))
  if vmins != 0:
    vtimetext = (str(((str(vmins) + str('m ')))) + str(vtimetext))
  vtimetext = (str('Uptime: ') + str(vtimetext))
  uptime.setText(str(vtimetext))
  wait_ms(2)

[mb]

Interesting, when executing on a M5Stack Core2 via REPL I get an error message:

Traceback (most recent call last):
  File "<stdin>", line 21, in <module>
AttributeError: 'TFT' object has no attribute 'setBrightness'

[world101]

@mb

Different code...

Core:
lcd.setBrightness(10)

Core2:
screen.set_screen_brightness(10)

[mb]

I would prefer to have a stable API for all devices. Current situation makes re-use of code complicated.

Someone could write a wrapper API to cover the differences ;-)

xkcd comic

[ajb2k3]

I'm trying to push for a unified API but the problem is that some of the devices are slightly different and require slightly different commands.
Please add your request for a unified API to the suggestions list.