I've tried the similar code as above with an M5CoreS3 and ENV III unit as well and it worked fine for me.

I suggest you try the latest available UIFlow2 firmware version which is UIFlow2.0.0. alpah-28 at the time of this post.

Thanks
Felix

With UIFlow2.0.0. alpha-28 using an M5AtomS3 I can use the ENV III unit just fine. Code below:

import os, sys, io
import M5
from M5 import *
from hardware import *
from unit import *

label0 = None
label1 = None
label2 = None
i2c0 = None
env3_0 = None

def setup():
  global label0, label1, label2, i2c0, env3_0

  M5.begin()
  label0 = Widgets.Label("label0", 4, 8, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)
  label1 = Widgets.Label("label1", 3, 32, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)
  label2 = Widgets.Label("label2", 3, 54, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)

  i2c0 = I2C(0, scl=Pin(1), sda=Pin(2), freq=100000)
  env3_0 = ENVUnit(i2c=i2c0, type=3)

def loop():
  global label0, label1, label2, i2c0, env3_0
  M5.update()
  label0.setText(str(env3_0.read_temperature()))
  label1.setText(str(env3_0.read_pressure()))
  label2.setText(str(env3_0.read_humidity()))

if __name__ == '__main__':
  try:
    setup()
    while True:
      loop()
  except (Exception, KeyboardInterrupt) as e:
    try:
      from utility import print_error_msg
      print_error_msg(e)
    except ImportError:
      print("please update to latest firmware")

Note: I do not have an M5AtomS3 lite, so I don't know if there might still be an issue there.

Thanks
Felix

@stefan-h: Did you manage to resolve this issue or is it still broken for you? I'm keen to solve my issue too!

I'm defintely having problems initializing the env3 unit in uiflow, just trying to debug with some feedbacks:

after showing "env" (for 3-4 secs) it reboots and starts over. As I said, the env3 module works fine with my m5atom. Is there any way to debug my S3? Or can someone help with a .ino code or something which just initializes the unit and outputs something to debug on the serial? As I said, I'm new to all this, don't think i can manage that myself.
Maybe I just messed up my librarys somehow?

Here ist the python code, uiflow generates:

import os, sys, io
import M5
from M5 import *
import time
from hardware import *
from unit import *

label0 = None
i2c0 = None
env3_0 = None

def setup():
global label0, i2c0, env3_0, random

M5.begin()
Widgets.fillScreen(0x222222)
label0 = Widgets.Label("Text", 58, 32, 1.0, 0xffffff, 0xff0000, Widgets.FONTS.DejaVu18)

time.sleep(1)
label0.setText(str('Hello'))
time.sleep(1)
label0.setText(str('i2c'))
i2c0 = I2C(0, scl=Pin(1), sda=Pin(2), freq=100000)
time.sleep(1)
label0.setText(str('env'))
env3_0 = ENV(i2c=i2c0, type=3)
label0.setText(str('DONE!'))

def loop():
global label0, i2c0, env3_0, random
M5.update()
label0.setText(str(env3_0.read_temperature()))
time.sleep_ms(500)

if name == 'main':
try:
setup()
while True:
loop()
except (Exception, KeyboardInterrupt) as e:
try:
from utility import print_error_msg
print_error_msg(e)
except ImportError:
print("please update to latest firmware")

Thank,
Stefan