Error when running basic examples

[andrewcdowning]

When running any examples I get the following error

(pimoroni) pi@weather:~/Pimoroni/weatherhat/examples $ python basic.py 
Traceback (most recent call last):
  File "/home/pi/Pimoroni/weatherhat/examples/basic.py", line 5, in <module>
    sensor = weatherhat.WeatherHAT()
  File "/home/pi/.virtualenvs/pimoroni/lib/python3.9/site-packages/weatherhat/__init__.py", line 62, in __init__
    self._int = self._chip.request_lines(
  File "/home/pi/.virtualenvs/pimoroni/lib/python3.9/site-packages/gpiod/chip.py", line 331, in request_lines
    req_internal = cast(_ext.Chip, self._chip).request_lines(
OSError: [Errno 16] Device or resource busy
Exception ignored in: <function WeatherHAT.__del__ at 0xf737f2b0>
Traceback (most recent call last):
  File "/home/pi/.virtualenvs/pimoroni/lib/python3.9/site-packages/weatherhat/__init__.py", line 121, in __del__
    self._poll_thread.join()
AttributeError: 'WeatherHAT' object has no attribute '_poll_thread'
(pimoroni) pi@weather:~/Pimoroni/weatherhat/examples $ 

I can reproduce in console by trying

>>> import weatherhat
>>> 
>>> sensor = weatherhat.WeatherHAT()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/pi/.virtualenvs/pimoroni/lib/python3.9/site-packages/weatherhat/__init__.py", line 62, in __init__
    self._int = self._chip.request_lines(
  File "/home/pi/.virtualenvs/pimoroni/lib/python3.9/site-packages/gpiod/chip.py", line 331, in request_lines
    req_internal = cast(_ext.Chip, self._chip).request_lines(
OSError: [Errno 16] Device or resource busy

When I write code to access the BME280 Sensor directly I can access and get readings directly

>>> import bme280
>>> from smbus2 import SMBus
>>> import time
>>> from bme280 import BME280
>>> bus = SMBus(1)
>>> bme280 = BME280(i2c_dev=bus)
>>> 
>>> while True:
...     temperature = bme280.get_temperature()
...     pressure = bme280.get_pressure()
...     humidity = bme280.get_humidity()
...     print(f"{temperature:05.2f}°C {pressure:05.2f}hPa {humidity:05.2f}%")
...     time.sleep(1)
... 
24.55°C 819.55hPa 21.61%
24.55°C 819.55hPa 21.61%
24.56°C 819.56hPa 21.61%
24.56°C 819.56hPa 21.59%
24.56°C 819.56hPa 21.57%
...

I currently have wind and rain sensors plugged in but it is the same result when they are unplugged.

I am getting addresses with i2c detect command.

(pimoroni) pi@weather:~/Pimoroni/weatherhat/examples $ i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- -- -- -- -- -- -- -- 
10: -- -- 12 -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- 23 -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- 76 --   

[helgibbons]

Sorry for the very late reply here! Hopefully you managed to figure this one out, but if not...

I suspect this error is happening because two scripts are trying to access the hardware at the same time. Did you modify your crontab file to run the weather example automatically on start-up, as suggested in the Learn Guide? If so, you might need to edit the file again and comment out or remove that line if you want to be able to run other examples from the terminal.

[PaulaT]

Hi Hel,
I get the same problem but it is most likely that the issue is with the current later version of Numpty on a fresh build and current update/upgrade with 202505-13-raspios-bookworm-armhf.img.z on a 3B+. A exact copy of your building environment script produces.

paulat@Rpi64Book12-32:~ $ git clone https://github.com/pimoroni/weatherhat-python.git
Cloning into 'weatherhat-python'...
remote: Enumerating objects: 698, done.
remote: Counting objects: 100% (150/150), done.
remote: Compressing objects: 100% (64/64), done.
remote: Total 698 (delta 91), reused 100 (delta 86), pack-reused 548 (from 1)
Receiving objects: 100% (698/698), 143.73 KiB | 426.00 KiB/s, done.
Resolving deltas: 100% (400/400), done.
paulat@Rpi64Book12-32:~ $ sudo apt install python3-pip git libatlas-base-dev
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
python3-pip is already the newest version (23.0.1+dfsg-1+rpt1).
git is already the newest version (1:2.39.5-0+deb12u2).
The following packages were automatically installed and are no longer required:
  2to3 fonts-mathjax idle idle-python3.11 libjs-mathjax
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  libatlas3-base
Suggested packages:
  libatlas-doc liblapack-doc
The following NEW packages will be installed:
  libatlas-base-dev libatlas3-base
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 4,856 kB of archives.
After this operation, 25.6 MB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://raspbian.raspberrypi.com/raspbian bookworm/main armhf libatlas3-base armhf 3.10.3-13+rpi1 [2,356 kB]
Get:2 http://raspbian.raspberrypi.com/raspbian bookworm/main armhf libatlas-base-dev armhf 3.10.3-13+rpi1 [2,500 kB]
Fetched 4,856 kB in 3s (1,548 kB/s)            
Selecting previously unselected package libatlas3-base:armhf.
(Reading database ... 186540 files and directories currently installed.)
Preparing to unpack .../libatlas3-base_3.10.3-13+rpi1_armhf.deb ...
Unpacking libatlas3-base:armhf (3.10.3-13+rpi1) ...
Selecting previously unselected package libatlas-base-dev:armhf.
Preparing to unpack .../libatlas-base-dev_3.10.3-13+rpi1_armhf.deb ...
Unpacking libatlas-base-dev:armhf (3.10.3-13+rpi1) ...
Setting up libatlas3-base:armhf (3.10.3-13+rpi1) ...
update-alternatives: using /usr/lib/arm-linux-gnueabihf/atlas/libblas.so.3 to pr
ovide /usr/lib/arm-linux-gnueabihf/libblas.so.3 (libblas.so.3-arm-linux-gnueabih
f) in auto mode
update-alternatives: using /usr/lib/arm-linux-gnueabihf/atlas/liblapack.so.3 to
provide /usr/lib/arm-linux-gnueabihf/liblapack.so.3 (liblapack.so.3-arm-linux-gn
ueabihf) in auto mode
Setting up libatlas-base-dev:armhf (3.10.3-13+rpi1) ...
update-alternatives: using /usr/lib/arm-linux-gnueabihf/atlas/libblas.so to prov
ide /usr/lib/arm-linux-gnueabihf/libblas.so (libblas.so-arm-linux-gnueabihf) in
auto mode
update-alternatives: using /usr/lib/arm-linux-gnueabihf/atlas/liblapack.so to pr
ovide /usr/lib/arm-linux-gnueabihf/liblapack.so (liblapack.so-arm-linux-gnueabih
f) in auto mode
Processing triggers for libc-bin (2.36-9+rpt2+deb12u10) ...

paulat@Rpi64Book12-32:~ $ cd weatherhat-python/
paulat@Rpi64Book12-32:~/weatherhat-python $ mc

paulat@Rpi64Book12-32:~/weatherhat-python $ ./install.sh
Installing weatherhat...

This script should be run in a virtual Python environment.
Would you like us to create and/or use a default one? [y/N] y

Creating a new virtual Python environment in /home/paulat/.virtualenvs/pimoroni, please wait...

Checking for /home/paulat/Pimoroni/auto_venv.sh

Creating /home/paulat/Pimoroni/auto_venv.sh

Checking Dependencies. Please wait...
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Requirement already satisfied: toml in /usr/lib/python3/dist-packages (0.10.2)

Installing for Python 3.11.2...

Installing stable library from pypi.

Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting weatherhat
  Downloading https://www.piwheels.org/simple/weatherhat/weatherhat-1.0.0-py3-none-any.whl (13 kB)
Collecting ltr559>=1.0.0
  Downloading https://www.piwheels.org/simple/ltr559/ltr559-1.0.0-py3-none-any.whl (10 kB)
Collecting pimoroni-bme280>=1.0.0
  Downloading https://www.piwheels.org/simple/pimoroni-bme280/pimoroni_bme280-1.0.0-py3-none-any.whl (7.8 kB)
Collecting pimoroni-ioexpander>=1.0.1
  Downloading https://www.piwheels.org/simple/pimoroni-ioexpander/pimoroni_ioexpander-1.0.1-py3-none-any.whl (52 kB)
     â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” 52.2/52.2 kB 640.3 kB/s eta 0:00:00
Requirement already satisfied: smbus2 in /usr/lib/python3/dist-packages (from weatherhat) (0.4.2)
Collecting st7789>=1.0.1
  Downloading https://www.piwheels.org/simple/st7789/st7789-1.0.1-py3-none-any.whl (10 kB)
Collecting i2cdevice>=1.0.0
  Downloading https://www.piwheels.org/simple/i2cdevice/i2cdevice-1.0.0-py3-none-any.whl (10 kB)
Collecting gpiod
  Downloading https://www.piwheels.org/simple/gpiod/gpiod-2.3.0-cp311-cp311-linux_armv7l.whl (94 kB)
     â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” 94.8/94.8 kB 857.9 kB/s eta 0:00:00
Collecting gpiodevice>=0.0.4
  Downloading https://www.piwheels.org/simple/gpiodevice/gpiodevice-0.0.5-py3-none-any.whl (9.2 kB)
Collecting numpy>=1.26.4
  Downloading numpy-2.3.0.tar.gz (20.4 MB)
     â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” 20.4/20.4 MB 1.3 MB/s eta 0:00:00
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Installing backend dependencies ... done
  Preparing metadata (pyproject.toml) ... done
Collecting spidev>=3.6
  Downloading spidev-3.7.tar.gz (11 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... done
Building wheels for collected packages: numpy, spidev
  Building wheel for numpy (pyproject.toml) ... done
  Created wheel for numpy: filename=numpy-2.3.0-cp311-cp311-linux_armv7l.whl size=6114381 sha256=2356f8c53e3026a30e85d4f8daf2d56cde3b9680892d36e94e10d1be6cea15cd
  Stored in directory: /home/paulat/.cache/pip/wheels/c1/ce/9e/c01c1882ed5467f725e5754736b04cc35f860462437dd6b64a
  Building wheel for spidev (pyproject.toml) ... done
  Created wheel for spidev: filename=spidev-3.7-cp311-cp311-linux_armv7l.whl size=40774 sha256=41f9b1d64c31537519e00b2fef3f375733920f9e69e19d3cba48380af2dccfdf
  Stored in directory: /home/paulat/.cache/pip/wheels/e4/cc/1a/dfbbd5fd5c41025641f6589e53225f54387cb4c551461ef763
Successfully built numpy spidev
Installing collected packages: spidev, pimoroni-ioexpander, numpy, i2cdevice, gpiod, pimoroni-bme280, ltr559, gpiodevice, st7789, weatherhat
  Attempting uninstall: spidev
    Found existing installation: spidev 3.5
    Not uninstalling spidev at /usr/lib/python3/dist-packages, outside environment /home/paulat/.virtualenvs/pimoroni
    Can't uninstall 'spidev'. No files were found to uninstall.
  Attempting uninstall: numpy
    Found existing installation: numpy 1.24.2
    Not uninstalling numpy at /usr/lib/python3/dist-packages, outside environment /home/paulat/.virtualenvs/pimoroni
    Can't uninstall 'numpy'. No files were found to uninstall.
ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
scipy 1.10.1 requires numpy<1.27.0,>=1.19.5, but you have numpy 2.3.0 which is incompatible.
Successfully installed gpiod-2.3.0 gpiodevice-0.0.5 i2cdevice-1.0.0 ltr559-1.0.0 numpy-2.3.0 pimoroni-bme280-1.0.0 pimoroni-ioexpander-1.0.1 spidev-3.7 st7789-1.0.1 weatherhat-1.0.0
Done!

Using config.txt in /boot/firmware

Running setup commands...

Setting up i2c and SPI..
Backing up /boot/firmware/config.txt to /boot/firmware/config.preinstall-weatherhat-2025-06-09-18-51-29.txt

Running: "sudo raspi-config nonint do_spi 0"
Running: "sudo raspi-config nonint do_i2c 0"

Would you like to copy examples to /home/paulat/Pimoroni/weatherhat? [y/N] y
Copying examples to /home/paulat/Pimoroni/weatherhat
Done!

Would you like to install example dependencies? [y/N] y
Installing dependencies from requirements-examples.txt...
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting fonts
  Downloading https://www.piwheels.org/simple/fonts/fonts-0.0.3-py3-none-any.whl (4.2 kB)
Collecting font-manrope
  Downloading https://www.piwheels.org/simple/font-manrope/font_manrope-0.0.2-py3-none-any.whl (366 kB)
     â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” 366.6/366.6 kB 1.1 MB/s eta 0:00:00
Collecting pyyaml
  Downloading https://www.piwheels.org/simple/pyyaml/PyYAML-6.0.2-cp311-cp311-linux_armv7l.whl (45 kB)
     â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” 45.4/45.4 kB 680.2 kB/s eta 0:00:00
Collecting adafruit-io
  Downloading https://www.piwheels.org/simple/adafruit-io/adafruit_io-2.8.0-py3-none-any.whl (22 kB)
Requirement already satisfied: numpy in /home/paulat/.virtualenvs/pimoroni/lib/python3.11/site-packages (from -r requirements-examples.txt (line 5)) (2.3.0)
Requirement already satisfied: pillow in /usr/lib/python3/dist-packages (from -r requirements-examples.txt (line 6)) (9.4.0)
Requirement already satisfied: requests in /usr/lib/python3/dist-packages (from adafruit-io->-r requirements-examples.txt (line 4)) (2.28.1)
Collecting paho-mqtt
  Downloading https://www.piwheels.org/simple/paho-mqtt/paho_mqtt-2.1.0-py3-none-any.whl (67 kB)
     â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” 67.2/67.2 kB 424.5 kB/s eta 0:00:00
Installing collected packages: fonts, font-manrope, pyyaml, paho-mqtt, adafruit-io
Successfully installed adafruit-io-2.8.0 font-manrope-0.0.2 fonts-0.0.3 paho-mqtt-2.1.0 pyyaml-6.0.2

Would you like to generate documentation? [y/N] y
Installing pdoc. Please wait...
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting pdoc
  Downloading pdoc-15.0.4-py3-none-any.whl (145 kB)
     â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” â” 146.0/146.0 kB 693.3 kB/s eta 0:00:00
Requirement already satisfied: Jinja2>=2.11.0 in /usr/lib/python3/dist-packages (from pdoc) (3.1.2)
Requirement already satisfied: pygments>=2.12.0 in /usr/lib/python3/dist-packages (from pdoc) (2.14.0)
Requirement already satisfied: MarkupSafe>=1.1.1 in /usr/lib/python3/dist-packages (from pdoc) (2.1.2)
Installing collected packages: pdoc
Successfully installed pdoc-15.0.4
Generating documentation.

Documentation saved to /home/paulat/Pimoroni/weatherhat/docs
Done!

All done!
If this is your first time installing you should reboot for hardware changes to take effect.
Find uninstall steps in /home/paulat/Pimoroni/weatherhat/uninstall.sh

paulat@Rpi64Book12-32:~/weatherhat-python $ reboot

SO This is after reboot

paulat@Rpi64Book12-32:~ $ source /.virtualenvs/pimoroni/bin/activate
(pimoroni) paulat@Rpi64Book12-32: $ ls
Bookshelf Cron-scripts Music Standby weatherhat-python
Camera Desktop Pictures system-connections
Control-scripts Documents Pimoroni Templates
core Downloads Public Videos
(pimoroni) paulat@Rpi64Book12-32:~ $ cd weatherhat-python/
(pimoroni) paulat@Rpi64Book12-32:/weatherhat-python $ ls
CHANGELOG.md LICENSE requirements-dev.txt tox.ini
check.sh Makefile requirements-examples.txt uninstall.sh
examples pyproject.toml testing weatherhat
install.sh README.md tests
(pimoroni) paulat@Rpi64Book12-32:/weatherhat-python $ cd examples/
(pimoroni) paulat@Rpi64Book12-32:~/weatherhat-python/examples $ ls
adafruit-io.py basic.py BME280.py icons settings.yml
averaging.py BME280-compensated.py buttons.py lcd.py weather.py

Attempting to run BME280.py or weather.py ends up with it unable to
find _poll_thread.
as previously noted by this thread.

This process needs to be updated for numpty-2.3.0 or greater.
Many thanks.

[helgibbons]

I fired up a 3B+ this afternoon but I've not managed to replicate this error I'm afraid - everything seems to be behaving itself for me. I did copy a little fix over from one of our other repos, which should help our installer serve up a more appropriate version of numpy.

Are you definitely starting from a fresh, up to date install of Pi OS, with no crontab entries or other scripts running that use the GPIO? I don't think scipy is something that we install so I'm wondering if some other software could be causing problems here?

[PaulaT]

HI Hel, It was a fresh microsd and the current raspberry pi install from the website, plus usual updates ! I did try it on my active 4b and it failed, so I tried again on a fresh 64bit install on the 3b+ and encountered the same problem similar if not identical to the previous issuer! No crontab running yet or other processes or scripts, just the examples from the python environment. All the i2c devices appear on i2cdetect. This simple rewrite of the test program works though without the weatherhat library :- ↓ ↓ ↓ ↓ Hello, we've activated a Python venv for you. To exit, type "deactivate". (pimoroni) ***@***.***:~ $ hostnamectl Static hostname: Rpi16Book14-64 Icon name: computer Machine ID: bf5eee08e89a49d186c4f62a9d2a090f Boot ID: e33f00533bd043a883b8fc7b448b9264 Operating System: Debian GNU/Linux 12 (bookworm) Kernel: Linux 6.12.34+rpt-rpi-v8 Architecture: arm64 (pimoroni) ***@***.***:~ $ cd weatherhat-python/examples/ (pimoroni) ***@***.***:~/weatherhat-python/examples $ python BME280-working.py BME280.py - Print raw readings from the BME280 weather sensor. Press Ctrl+C to exit program! Temperature: 21.22 *C Humidity: 76.28 % Pressure: 642.73 hPa Temperature: 24.04 *C Humidity: 48.27 % Pressure: 1017.80 hPa Temperature: 24.04 *C Humidity: 48.28 % Pressure: 1017.81 hPa Temperature: 24.04 *C Humidity: 48.28 % Pressure: 1017.81 hPa Temperature: 24.04 *C Humidity: 48.28 % Pressure: 1017.81 hPa ^CTraceback (most recent call last): File "/home/paulat/weatherhat-python/examples/BME280-working.py", line 28, in <module> time.sleep(1.0) KeyboardInterrupt (pimoroni) ***@***.***:~/weatherhat-python/examples $ cat BME280-working.py import time import bme280 from bme280 import BME280 from smbus2 import SMBus bus = SMBus(1) bme280 = BME280(i2c_dev=bus) # import weatherhat print(""" BME280.py - Print raw readings from the BME280 weather sensor. Press Ctrl+C to exit program! """) # sensor = weatherhat.WeatherHAT() while True: # sensor.update(interval1.0) temp1 = bme280.get_temperature() pres1 = bme280.get_pressure()+7.0 humi1 = bme280.get_humidity() print(f" Temperature: {temp1:05.2f} *C\n \ Humidity: {humi1:05.2f} %\n \ Pressure: {pres1:05.2f} hPa ") (pimoroni) ***@***.***:~/weatherhat-python/examples $ Kind regards Paula

…

On Mon, 11 Aug 2025 at 17:35, Hel Gibbons ***@***.***> wrote: *helgibbons* left a comment (pimoroni/weatherhat-python#37) <#37 (comment)> I fired up a 3B+ this afternoon but I've not managed to replicate this error I'm afraid - everything seems to be behaving itself for me. I did copy a little fix over from one of our other repos, which should help our installer serve up a more appropriate version of numpy. Are you definitely starting from a fresh, up to date install of Pi OS, with no crontab entries or other scripts running that use the GPIO? I don't think scipy is something that we install so I'm wondering if some other software could be causing problems here? — Reply to this email directly, view it on GitHub <#37 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAWNNWKM52A6XJMLXKJYPS33NDA4XAVCNFSM6AAAAABXW646E6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTCNZVHAYTMNZXGA> . You are receiving this because you commented.Message ID: ***@***.***>

[PaulaT]

Opps should have shown the results of your program too. So running the one without weatherhat calls, then your untouched example. (pimoroni) ***@***.***:~/weatherhat-python/examples $ pwd /home/paulat/weatherhat-python/examples (pimoroni) ***@***.***:~/weatherhat-python/examples $ python BME280-working.py BME280.py - Print raw readings from the BME280 weather sensor. Press Ctrl+C to exit program! Temperature: 21.22 *C Humidity: 76.28 % Pressure: 642.73 hPa Temperature: 23.36 *C Humidity: 49.36 % Pressure: 1017.28 hPa Temperature: 23.37 *C Humidity: 49.35 % Pressure: 1017.29 hPa Temperature: 23.37 *C Humidity: 49.35 % Pressure: 1017.29 hPa ^CTraceback (most recent call last): File "/home/paulat/weatherhat-python/examples/BME280-working.py", line 28, in <module> time.sleep(1.0) KeyboardInterrupt (pimoroni) ***@***.***:~/weatherhat-python/examples $ python BME280.py BME280.py - Print raw readings from the BME280 weather sensor. Press Ctrl+C to exit! Traceback (most recent call last): File "/home/paulat/weatherhat-python/examples/BME280.py", line 10, in <module> sensor = weatherhat.WeatherHAT() ^^^^^^^^^^^^^^^^^^^^^^^ File "/home/paulat/.virtualenvs/pimoroni/lib/python3.11/site-packages/weatherhat/__init__.py", line 56, in __init__ self._ltr559 = LTR559(i2c_dev=self._i2c_dev) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/paulat/.virtualenvs/pimoroni/lib/python3.11/site-packages/ltr559/__init__.py", line 219, in __init__ self.part_id = self._ltr559.get('PART_ID') ^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/paulat/.virtualenvs/pimoroni/lib/python3.11/site-packages/i2cdevice/__init__.py", line 230, in get self.read_register(register) File "/home/paulat/.virtualenvs/pimoroni/lib/python3.11/site-packages/i2cdevice/__init__.py", line 183, in read_register self.values[register.name] = self._i2c_read(register.address, register.bit_width) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/paulat/.virtualenvs/pimoroni/lib/python3.11/site-packages/i2cdevice/__init__.py", line 288, in _i2c_read for x in self._i2c.read_i2c_block_data(self._i2c_address, register, bit_width // self._bit_width): ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3/dist-packages/smbus2/smbus2.py", line 617, in read_i2c_block_data ioctl(self.fd, I2C_SMBUS, msg) OSError: [Errno 121] Remote I/O error Exception ignored in: <function WeatherHAT.__del__ at 0x7fae2fafc0> Traceback (most recent call last): File "/home/paulat/.virtualenvs/pimoroni/lib/python3.11/site-packages/weatherhat/__init__.py", line 121, in __del__ self._poll_thread.join() ^^^^^^^^^^^^^^^^^ AttributeError: 'WeatherHAT' object has no attribute '_poll_thread' (pimoroni) ***@***.***:~/weatherhat-python/examples $

…

On Mon, 11 Aug 2025 at 18:00, Paula Taylor ***@***.***> wrote: HI Hel, It was a fresh microsd and the current raspberry pi install from the website, plus usual updates ! I did try it on my active 4b and it failed, so I tried again on a fresh 64bit install on the 3b+ and encountered the same problem similar if not identical to the previous issuer! No crontab running yet or other processes or scripts, just the examples from the python environment. All the i2c devices appear on i2cdetect. This simple rewrite of the test program works though without the weatherhat library :- ↓ ↓ ↓ ↓ Hello, we've activated a Python venv for you. To exit, type "deactivate". (pimoroni) ***@***.***:~ $ hostnamectl Static hostname: Rpi16Book14-64 Icon name: computer Machine ID: bf5eee08e89a49d186c4f62a9d2a090f Boot ID: e33f00533bd043a883b8fc7b448b9264 Operating System: Debian GNU/Linux 12 (bookworm) Kernel: Linux 6.12.34+rpt-rpi-v8 Architecture: arm64 (pimoroni) ***@***.***:~ $ cd weatherhat-python/examples/ (pimoroni) ***@***.***:~/weatherhat-python/examples $ python BME280-working.py BME280.py - Print raw readings from the BME280 weather sensor. Press Ctrl+C to exit program! Temperature: 21.22 *C Humidity: 76.28 % Pressure: 642.73 hPa Temperature: 24.04 *C Humidity: 48.27 % Pressure: 1017.80 hPa Temperature: 24.04 *C Humidity: 48.28 % Pressure: 1017.81 hPa Temperature: 24.04 *C Humidity: 48.28 % Pressure: 1017.81 hPa Temperature: 24.04 *C Humidity: 48.28 % Pressure: 1017.81 hPa ^CTraceback (most recent call last): File "/home/paulat/weatherhat-python/examples/BME280-working.py", line 28, in <module> time.sleep(1.0) KeyboardInterrupt (pimoroni) ***@***.***:~/weatherhat-python/examples $ cat BME280-working.py import time import bme280 from bme280 import BME280 from smbus2 import SMBus bus = SMBus(1) bme280 = BME280(i2c_dev=bus) # import weatherhat print(""" BME280.py - Print raw readings from the BME280 weather sensor. Press Ctrl+C to exit program! """) # sensor = weatherhat.WeatherHAT() while True: # sensor.update(interval1.0) temp1 = bme280.get_temperature() pres1 = bme280.get_pressure()+7.0 humi1 = bme280.get_humidity() print(f" Temperature: {temp1:05.2f} *C\n \ Humidity: {humi1:05.2f} %\n \ Pressure: {pres1:05.2f} hPa ") (pimoroni) ***@***.***:~/weatherhat-python/examples $ Kind regards Paula On Mon, 11 Aug 2025 at 17:35, Hel Gibbons ***@***.***> wrote: > *helgibbons* left a comment (pimoroni/weatherhat-python#37) > <#37 (comment)> > > I fired up a 3B+ this afternoon but I've not managed to replicate this > error I'm afraid - everything seems to be behaving itself for me. I did > copy a little fix over from one of our other repos, which should help our > installer serve up a more appropriate version of numpy. > > Are you definitely starting from a fresh, up to date install of Pi OS, > with no crontab entries or other scripts running that use the GPIO? I don't > think scipy is something that we install so I'm wondering if some other > software could be causing problems here? > > — > Reply to this email directly, view it on GitHub > <#37 (comment)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/AAWNNWKM52A6XJMLXKJYPS33NDA4XAVCNFSM6AAAAABXW646E6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTCNZVHAYTMNZXGA> > . > You are receiving this because you commented.Message ID: > ***@***.***> >

[IanD42]

Ref #37 (comment)

I'm having the same issues as: PaulaT
I have just made a fresh install on my Pi Zero 2W with the latest OS:
PRETTY_NAME="Debian GNU/Linux 13 (trixie)"
NAME="Debian GNU/Linux"
VERSION_ID="13"
VERSION="13 (trixie)"
VERSION_CODENAME=trixie
DEBIAN_VERSION_FULL=13.2
ID=debian
booting from USB drive: No issues
Have installed the weather hat Python library via:
git clone https://github.com/pimoroni/weatherhat-python
cd weatherhat-python
./install.sh
with the default virtual environment created
running the following code
(pimoroni) ian@weather-stn:~/weatherhat-python/examples $ python basic.py
gives the following output (see image)

I've tried running the other example codes, and all appear to give the same error.
The exception is the buttons.py and lcd.py code, which works as expected.

[IanD42]

Have now made a fresh install of Raspberry Pi OS 32-bit version on my Pi Zero 2W

as opposed to the previous 64-bit version:

Quick test with the example Basic.py code now runs as expected:

The question is, should I be able to use the weatherhat with Raspberry Pi OS 64-bit version?