MMM-DHT22

[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.

[sdetweil]

@wishmaster270 cool, you have the venv in the module folder

[lif]

@wishmaster270 said in MMM-DHT22:

source py-venv/bin/activate

Same failure on install.

from RPi import GPIO
ModuleNotFoundError: No module named 'RPi'
```, 

The output of pip freeze is ```
MagicMirror/modules/MMM-Temperature/scripts $ source py-venv/bin/activate
(py-venv) pi@mm:~/MagicMirror/modules/MMM-Temperature/scripts $ pip freeze
Adafruit-Blinka==8.66.2
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==3.84.0
Adafruit-PureIO==1.1.11
binho-host-adapter==0.1.6
pyftdi==0.57.1
pyserial==3.5
pyusb==1.3.1
sysv-ipc==1.1.0
typing_extensions==4.15.0
(py-venv) pi@mm:~/MagicMirror/modules/MMM-Temperature/scripts $ deactivate
pi@mm:~/MagicMirror/modules/MMM-Temperature/scripts $ 

The only difference from yours is mine is missing the second line.

Hope this helps

[lif]

Hi,

I’ve gone through your procedure again and this time it works.

The only difference is that I run a python3 script to control screen blanking using a PIR before starting Magic Mirror, this time I didn’t start that script.

With the PIR script and MagicMirror running I get:

pi@mm:~/MagicMirror/modules/MMM-Temperature/scripts $ ./venvWrapper.py --venv-name py-venv --run ./dht22
{"temperature_c": 23.5, "humidity": 53.7, "temperature_f": 74.30000000000001, "error": false}
pi@mm:~/MagicMirror/modules/MMM-Temperature/scripts $ ./venvWrapper.py --venv-name py-venv --run ./dht22
{"temperature_c": 23.5, "humidity": 53.7, "temperature_f": 74.30000000000001, "error": false}
pi@mm:~/MagicMirror/modules/MMM-Temperature/scripts $ ./venvWrapper.py --venv-name py-venv --run ./dht22
{"temperature_c": 0.0, "humidity": 0.0, "temperature_f": 32.0, "error": true}
pi@mm:~/MagicMirror/modules/MMM-Temperature/scripts $ ./venvWrapper.py --venv-name py-venv --run ./dht22
{"temperature_c": 23.6, "humidity": 53.5, "temperature_f": 74.48, "error": false}
pi@mm:~/MagicMirror/modules/MMM-Temperature/scripts $ ./venvWrapper.py --venv-name py-venv --run ./dht22
{"temperature_c": 0.0, "humidity": 0.0, "temperature_f": 32.0, "error": true}
pi@mm:~/MagicMirror/modules/MMM-Temperature/scripts $ ./venvWrapper.py --venv-name py-venv --run ./dht22
{"temperature_c": 23.7, "humidity": 53.3, "temperature_f": 74.66, "error": false}
pi@mm:~/MagicMirror/modules/MMM-Temperature/scripts $ ./venvWrapper.py --venv-name py-venv --run ./dht22
{"temperature_c": 23.8, "humidity": 53.2, "temperature_f": 74.84, "error": false}
pi@mm:~/MagicMirror/modules/MMM-Temperature/scripts $ 

I can live with that.

Thanks for all your help