PiDash

Installation

Temperature Sensor DHT22

To read DHT22 data the new library adafruit-circuitpython-dht 3.7.0 did not work for me. However the old one Adafruit-DHT 1.4.0 did.

sudo pip install Adafruit_DHT

For dash visualisation

You might need some other libraries:

sudo apt install libatlas-base-dev

Fix "Illegal instruction" error:

• numpy version 1.20.3
• pandas version 1.2

Worked for me.

For server setup

I followed this instruction to run the app on a server:

https://www.techcoil.com/blog/how-to-deploy-python-3-flask-application-on-raspberry-pi-3-with-raspbian-stretch-lite-nginx-supervisor-virtualenv-and-gunicorn/

Note: For gunicorn to work with dash you need to enter server instead of app.

You can simply test this by running in the root directory with the active virtualenv the following command:

gunicorn -b :8000 src:server