MMM-DHT22

lif

I have installed the module but get the following when I try to run your test ‘python3 AdafruitDHT.py 22 26’

I know the DHT-22 works on GPIO pin 26
~/Adafruit_Python_DHT/examples $ sudo python3 AdafruitDHT.py 22 26
Traceback (most recent call last):
File “/home/pi/Adafruit_Python_DHT/examples/AdafruitDHT.py”, line 41, in
humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/local/lib/python3.11/dist-packages/Adafruit_DHT-1.4.0-py3.11-linux-aarch64.egg/Adafruit_DHT/common.py”, line 94, in read_retry
humidity, temperature = read(sensor, pin, platform)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/local/lib/python3.11/dist-packages/Adafruit_DHT-1.4.0-py3.11-linux-aarch64.egg/Adafruit_DHT/common.py”, line 80, in read
platform = get_platform()
^^^^^^^^^^^^^^
File “/usr/local/lib/python3.11/dist-packages/Adafruit_DHT-1.4.0-py3.11-linux-aarch64.egg/Adafruit_DHT/common.py”, line 63, in get_platform
raise RuntimeError(‘Unknown platform.’)
RuntimeError: Unknown platform.

Any thoughts?

BKeyport

@lif It’s requiring tools no longer available, so dead module. Use something else.

https://github.com/Tom-Hirschberger/MMM-Temperature is what I used when I had a module hooked up to it.

lif

@BKeyport said in MMM-DHT22:

@lif It’s requiring tools no longer available, so dead module. Use something else.

https://github.com/Tom-Hirschberger/MMM-Temperature is what I used when I had a module hooked up to it.

Thanks, I’ve given it a try but get an error in the last stage of the installation

~/MagicMirror/modules/MMM-Temperature/scripts $ ./venvWrapper.py --venv-name py-venv --run ./dht22

Traceback (most recent call last):
  File "/home/pi/MagicMirror/modules/MMM-Temperature/scripts/./dht22", line 6, in <module>
    import board
  File "/home/pi/MagicMirror/modules/MMM-Temperature/scripts/py-venv/lib/python3.11/site-packages/board.py", line 51, in <module>
    from adafruit_blinka.board.raspberrypi.raspi_40pin import *
  File "/home/pi/MagicMirror/modules/MMM-Temperature/scripts/py-venv/lib/python3.11/site-packages/adafruit_blinka/board/raspberrypi/raspi_40pin.py", line 6, in <module>
    from adafruit_blinka.microcontroller.bcm283x import pin
  File "/home/pi/MagicMirror/modules/MMM-Temperature/scripts/py-venv/lib/python3.11/site-packages/adafruit_blinka/microcontroller/bcm283x/pin.py", line 7, in <module>
    from adafruit_blinka.microcontroller.generic_linux.rpi_gpio_pin import Pin
  File "/home/pi/MagicMirror/modules/MMM-Temperature/scripts/py-venv/lib/python3.11/site-packages/adafruit_blinka/microcontroller/generic_linux/rpi_gpio_pin.py", line 6, in <module>
    from RPi import GPIO
ModuleNotFoundError: No module named 'RPi'

BKeyport

@lif I’m not sure on that, @wishmaster270 (Tom) would know more.

lif

Thanks, not the end of the world if I can’t use it.

wishmaster270

@lif Hi. Great you want to try one of my modules.

Can you try installing a additional python system package with

sudo apt install python3-rpi-lgpio

I tried the scripts on my newly installed system with Bookworm and everything worked as expected.
Maybe the missing package had been installed with something else I installed on my system.

lif

@wishmaster270 said in MMM-DHT22:

@lif Hi. Great you want to try one of my modules.

Can you try installing a additional python system package with
sudo apt install python3-rpi-lgpio
I tried the scripts on my newly installed system with Bookworm and everything worked as expected.
Maybe the missing package had been installed with something else I installed on my system.

Thanks, that was already installed

sudo apt install python3-rpi-lgpio
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
python3-rpi-lgpio is already the newest version (0.6-0~rpt1).
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.

This is on Bookworm

wishmaster270

@lif
That’s strange…Can you try to start with a new, fresh virtual python environment and install the needed libs again?

Remove old virtual environment:

rm -rf /home/pi/MagicMirror/modules/MMM-Temperature/scripts/py-venv

Install the needed system libs:

sudo apt -y update && sudo apt -y install python3-venv libgpiod2

Re-Create the virtual environment:

cd ~/MagicMirror/modules/MMM-Temperature/scripts
./venvWrapper.py --verbose --venv-name py-venv --create

Re-Install the libs:

cd ~/MagicMirror/modules/MMM-Temperature/scripts
./venvWrapper.py --venv-name py-venv --install-libs adafruit-circuitpython-dht

Run the test again:

cd ~/MagicMirror/modules/MMM-Temperature/scripts
./venvWrapper.py --venv-name py-venv --run ./dht22

If it fails again. Can you please provide the output of

cd ~/MagicMirror/modules/MMM-Temperature/scripts
source py-venv/bin/activate
pip freeze
deactivate

The output should look something like:

Adafruit-Blinka==8.66.1
Adafruit-Blinka-Raspberry-Pi5-Neopixel==1.0.0rc2
adafruit-circuitpython-busdevice==5.2.13
adafruit-circuitpython-connectionmanager==3.1.5
adafruit-circuitpython-dht==4.0.9
adafruit-circuitpython-requests==4.1.13
adafruit-circuitpython-typing==1.12.2
Adafruit-PlatformDetect==3.83.2
Adafruit-PureIO==1.1.11
binho-host-adapter==0.1.6
lgpio==0.2.2.0
pyftdi==0.57.1
pyserial==3.5
pyusb==1.3.1
rpi-ws281x==5.0.0
RPi.GPIO==0.7.1
sysv-ipc==1.1.0
typing_extensions==4.15.0

sdetweil

@wishmaster270 AND you must enable the virtual env in the script if pm2 starts MagicMirror

wishmaster270

@sdetweil Hi sam. My wrapper script will use the python binary in the virtual environment folder. This way the environment will be activated automatically.