<![CDATA[OSError: [Errno 116] ETIMEDOUT]]>Hey guys,

I am using a Core2 connected to a M5Stack 4-channel relay. A PAHub is connected to each channel and six I2C Weight Units are connected to each PAHub. So I have a total of 24 I2C Weight Units in use. Unfortunately, I always get an error that I can't solve. This error occurs even when I connect the Core2 directly to a PAHub and six I2C Weight Units. Can someone help me out?

Traceback (most recent call last):
File "<stdin>", line 166, in <module>
File "<stdin>", line 126, in setup
File "unit/weight_i2c.py", line 36, in init
File "unit/weight_i2c.py", line 40, in _available
File "unit/pahub.py", line 52, in scan
File "unit/pahub.py", line 43, in release_channel
OSError: [Errno 116] ETIMEDOUT

]]>https://community.m5stack.com/topic/7162/oserror-errno-116-etimedoutRSS for NodeWed, 29 Apr 2026 01:06:05 GMTMon, 06 Jan 2025 14:14:21 GMT60<![CDATA[Reply to OSError: [Errno 116] ETIMEDOUT on Wed, 08 Jan 2025 14:10:21 GMT]]>@ajb2k3 The relay was not connected. I connected the Core2 directly to a Hub and used the following code. Do you see something that could be the reason for the error?

import os, sys, io
import M5
from M5 import *
from unit import WeightI2CUnit
from hardware import *
import time
from unit import PAHUBUnit

weight = None
airScale = None
notMedical = None
tareButton = None
measureButton = None
kg = None
i2c0 = None
pahub_0 = None
weight_i2c_0 = None
weight_i2c_1 = None
weight_i2c_2 = None
weight_i2c_3 = None
weight_i2c_4 = None
weight_i2c_5 = None

tare_weight = None
total_weight = None
adc0 = None
adc1 = None

Calibration

def calibration():
global tare_weight, total_weight, adc0, adc1, weight, airScale, notMedical, tareButton, measureButton, kg, i2c0, pahub_0, weight_i2c_0, weight_i2c_1, weight_i2c_2, weight_i2c_3, weight_i2c_4, weight_i2c_5
kg.setVisible(False)
weight.setText(str('START'))
time.sleep(5)
weight_i2c_0.set_reset_offset()
weight.setText(str('CAL'))
time.sleep(2)
adc0 = weight_i2c_0.get_adc_raw
weight.setText(str('WEIGHT'))
time.sleep(10)
adc1 = weight_i2c_0.get_adc_raw
weight.setText(str('DONE'))
time.sleep(2)
weight_i2c_0.set_calibration(0, adc0, 20000, adc1)
time.sleep(5)
weight_i2c_1.set_reset_offset()
weight.setText(str('CAL'))
time.sleep(2)
adc0 = weight_i2c_1.get_adc_raw
weight.setText(str('WEIGHT'))
time.sleep(10)
adc1 = weight_i2c_1.get_adc_raw
weight.setText(str('DONE'))
time.sleep(2)
weight_i2c_1.set_calibration(0, adc0, 20000, adc1)
time.sleep(5)
weight_i2c_2.set_reset_offset()
weight.setText(str('CAL'))
time.sleep(2)
adc0 = weight_i2c_2.get_adc_raw
weight.setText(str('WEIGHT'))
time.sleep(10)
adc1 = weight_i2c_2.get_adc_raw
weight.setText(str('DONE'))
time.sleep(2)
weight_i2c_2.set_calibration(0, adc0, 20000, adc1)
time.sleep(5)
weight_i2c_3.set_reset_offset()
weight.setText(str('CAL'))
time.sleep(2)
adc0 = weight_i2c_3.get_adc_raw
weight.setText(str('WEIGHT'))
time.sleep(10)
adc1 = weight_i2c_3.get_adc_raw
weight.setText(str('DONE'))
time.sleep(2)
weight_i2c_3.set_calibration(0, adc0, 20000, adc1)
time.sleep(5)
weight_i2c_4.set_reset_offset()
weight.setText(str('CAL'))
time.sleep(2)
adc0 = weight_i2c_4.get_adc_raw
weight.setText(str('WEIGHT'))
time.sleep(10)
adc1 = weight_i2c_4.get_adc_raw
weight.setText(str('DONE'))
time.sleep(2)
weight_i2c_4.set_calibration(0, adc0, 20000, adc1)
time.sleep(5)
weight_i2c_5.set_reset_offset()
weight.setText(str('CAL'))
time.sleep(2)
adc0 = weight_i2c_5.get_adc_raw
weight.setText(str('WEIGHT'))
time.sleep(10)
adc1 = weight_i2c_5.get_adc_raw
weight.setText(str('DONE'))
time.sleep(2)
weight_i2c_5.set_calibration(0, adc0, 20000, adc1)
weight.setText(str('END'))

Tare

def tare():
global tare_weight, total_weight, adc0, adc1, weight, airScale, notMedical, tareButton, measureButton, kg, i2c0, pahub_0, weight_i2c_0, weight_i2c_1, weight_i2c_2, weight_i2c_3, weight_i2c_4, weight_i2c_5
weight_i2c_0.set_reset_offset()
weight_i2c_1.set_reset_offset()
weight_i2c_2.set_reset_offset()
weight_i2c_3.set_reset_offset()
weight_i2c_4.set_reset_offset()
weight_i2c_5.set_reset_offset()
tare_weight = sum([weight_i2c_0.get_weight_float, weight_i2c_1.get_weight_float, weight_i2c_2.get_weight_float, weight_i2c_3.get_weight_float, weight_i2c_4.get_weight_float, weight_i2c_5.get_weight_float])
return tare_weight

Measure

def measure():
global tare_weight, total_weight, adc0, adc1, weight, airScale, notMedical, tareButton, measureButton, kg, i2c0, pahub_0, weight_i2c_0, weight_i2c_1, weight_i2c_2, weight_i2c_3, weight_i2c_4, weight_i2c_5
total_weight = sum([weight_i2c_0.get_weight_float, weight_i2c_1.get_weight_float, weight_i2c_2.get_weight_float, weight_i2c_3.get_weight_float, weight_i2c_4.get_weight_float, weight_i2c_5.get_weight_float])
return total_weight

def setup():
global weight, airScale, notMedical, tareButton, measureButton, kg, i2c0, pahub_0, weight_i2c_0, weight_i2c_1, weight_i2c_2, weight_i2c_3, weight_i2c_4, weight_i2c_5, tare_weight, total_weight, adc0, adc1

M5.begin()
Widgets.fillScreen(0x222222)
weight = Widgets.Label("250.0", 8, 90, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu72)
airScale = Widgets.Label("airScale", 5, 7, 1.0, 0x89c6ff, 0x222222, Widgets.FONTS.DejaVu12)
notMedical = Widgets.Label("Not for Medical Use!", 115, 5, 1.0, 0xff0000, 0x222222, Widgets.FONTS.DejaVu18)
tareButton = Widgets.Label("Tare", 23, 210, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu24)
measureButton = Widgets.Label("Measure", 210, 210, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu24)
kg = Widgets.Label("kg", 230, 90, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu72)

i2c0 = I2C(0, scl=Pin(33), sda=Pin(32), freq=100000)
pahub_0 = PAHUBUnit(i2c=i2c0, channel=0)
weight_i2c_0 = WeightI2CUnit(PAHUBUnit(i2c=i2c0, channel=0), 0x26)
weight_i2c_1 = WeightI2CUnit(PAHUBUnit(i2c=i2c0, channel=1), 0x26)
weight_i2c_2 = WeightI2CUnit(PAHUBUnit(i2c=i2c0, channel=2), 0x26)
weight_i2c_3 = WeightI2CUnit(PAHUBUnit(i2c=i2c0, channel=3), 0x26)
weight_i2c_4 = WeightI2CUnit(PAHUBUnit(i2c=i2c0, channel=4), 0x26)
weight_i2c_5 = WeightI2CUnit(PAHUBUnit(i2c=i2c0, channel=5), 0x26)
weight.setVisible(False)
weight_i2c_0.set_lowpass_filter(True)
weight_i2c_1.set_lowpass_filter(True)
weight_i2c_2.set_lowpass_filter(True)
weight_i2c_3.set_lowpass_filter(True)
weight_i2c_4.set_lowpass_filter(True)
weight_i2c_5.set_lowpass_filter(True)
weight_i2c_0.set_average_filter_level(50)
weight_i2c_1.set_average_filter_level(50)
weight_i2c_2.set_average_filter_level(50)
weight_i2c_3.set_average_filter_level(50)
weight_i2c_4.set_average_filter_level(50)
weight_i2c_5.set_average_filter_level(50)
weight.setText(str("%.1f"%((tare() / 1000))))

def loop():
global weight, airScale, notMedical, tareButton, measureButton, kg, i2c0, pahub_0, weight_i2c_0, weight_i2c_1, weight_i2c_2, weight_i2c_3, weight_i2c_4, weight_i2c_5, tare_weight, total_weight, adc0, adc1
M5.update()
if BtnA.wasClicked():
kg.setVisible(False)
weight.setText(str('Tare...'))
time.sleep(3)
weight.setText(str("%.1f"%((tare() / 1000))))
kg.setVisible(True)
if BtnB.wasHold():
calibration()
time.sleep(5)
weight.setText(str("%.1f"%((tare() / 1000))))
kg.setVisible(True)
if BtnC.wasClicked():
weight.setText(str('Warten..'))
time.sleep(10)
weight.setText(str("%.1f"%((measure() / 1000))))
kg.setVisible(True)

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")

]]>https://community.m5stack.com/post/27814https://community.m5stack.com/post/27814Wed, 08 Jan 2025 14:10:21 GMT<![CDATA[Reply to OSError: [Errno 116] ETIMEDOUT on Wed, 08 Jan 2025 13:40:00 GMT]]>@laursena if you only have the relay connected but don’t change the code then you will continue to get the error becuase the code is still trying to look for them

]]>https://community.m5stack.com/post/27813https://community.m5stack.com/post/27813Wed, 08 Jan 2025 13:40:00 GMT<![CDATA[Reply to OSError: [Errno 116] ETIMEDOUT on Wed, 08 Jan 2025 13:04:20 GMT]]>@ajb2k3 thank you for your answer. I am connecting the hubs to the output of the relay and I see that the relay doesn't have an I2C output. But I also get the error without using the relay which is odd to me. Do you know why this could be?

]]>https://community.m5stack.com/post/27812https://community.m5stack.com/post/27812Wed, 08 Jan 2025 13:04:20 GMT<![CDATA[Reply to OSError: [Errno 116] ETIMEDOUT on Tue, 07 Jan 2025 20:28:35 GMT]]>@laursena You are connecting the hubs to the output of the relays?
If so it's because the hubs cant communicate. hubs must be connected before the relay

]]>https://community.m5stack.com/post/27799https://community.m5stack.com/post/27799Tue, 07 Jan 2025 20:28:35 GMT