MMM-DHT22

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