pi3dpf-ns-pi3dpf-owm 0.1.346

Module to compile OpenWeatherMap based weather forecasts for display in pi3d based picture frame

Pre-requisites

• Raspberry 3B+ or later
• Raspberry Pi OS (32-bit) with desktop and recommended software
• OpenWeatherMap API key (free, registration required)

Installation

Download pi3d-pictureframe Debian package from here

Install pi3d-pictureframe and its dependencies:

sudo apt-get update && sudo apt-get full-upgrade # update OS
cd /var/tmp; wget download-url # download debian package to install picture-frame package
sudo apt-get -f install /var/tmp/pi3d-pictureframe_2020.0719.171252-20b0bf4_armhf.deb # install

sudo raspi-config # change raspberry graphic system configuration
1: set gpu_mem=128        (Option 7 > A3 > Enter 128 or 256)
2: enable FAKE KMS driver (Option 7 > A8 > G2)

Basic Configuration

/home/pi/.pf/pf.config

This is the main configuration file. You want to change the cities, language and units used to display weather information provided by OpenWeatherMap.

Edit the file: vi /home/pi/.pf/pf.config, then add:

[DEFAULT]
#find your city ID: http://bulk.openweathermap.org/sample/city.list.json.gz
OWM_CITY_IDS : 2657896:de ; Zurich, Switzerland. Show weather description in German
OWM_UNITS : metric ; use 'metric' for °C or 'imperial' for °F

CEC_CONTROL_TV                 : no ; if you do not wish the TV turns on when picture frame starts
MQTT_SERVER_NAME               : egnor.nyx.net ; use your MQTT server name instead

Notes:

• on above 'vi' command, use 'i' to insert text, ':wq' the save pf.config
• pf.config parameter values can be assigned using colon (:) or equal sign (=)
• comments can be made using hash (#) or semi-colon (;). For in-line comments, always use (;)
• You may change arbitrary default values by perusing /opt/venvs/pi3d-pictureframe/lib/python3.7/site-packages/pi3dpf/cfg/pf.config, copy parameter names to /home/pi/.pf/pf.config and change their values.
• Beware using dns names (e.g. egnor.nyx.net) in MQTT_SERVER_NAME. If service does not start after reboot, use IP address instead.

/home/pi/.pf/pf_secrets

This file holds your API keys and passwords. pf.config parameters with their values prefixed with !SECRET will retrieve their effective values from pf_secrets.

Example:

OWM_API_KEY : !SECRET owm_api_key ; origin: pf.config

Edit the file: vi /home/pi/.pf/pf_secrets, then add:

mqtt_password: mqtt-secret
owm_api_key: register-and-get-your-own-key

Notes:

• Above example demonstrates how the pf.config parameter OWM_API_KEY is configured to get the value register-and-get-your-own-key. All you need to do is adding your API key to pf_secrets.
• you need to supply your own owm_api_key.
• changes to /home/pi/.pf/pf.config and /home/pi/.pf/pf_secrets take effect upon application restart.
• More on mqtt clients and mqtt_password in MQTT section.

Starting Picture Frame from the Command Line

Should you prefer starting the picture frame using MQTT, skip to the next section.

As user pi, on RPi3B+:

pi@campero:~ $ source /opt/venvs/pi3d-pictureframe/bin/activate
(pi3d-pictureframe) pi@campero:~/pi3d_demos $ PictureFrame2020.py --help # show available options
(pi3d-pictureframe) pi@campero:~ $ pictureframe.sh -h # show available options from helper script
(pi3d-pictureframe) pi@campero:~ $ pictureframe.sh -a pic-start -r -d /path/to/pictures

As user pi, on RPi4:

 pi@durin:~ $ sudo su - 
 root@durin:~# source /opt/venvs/pi3d-pictureframe/bin/activate
 (pi3d-pictureframe) root@durin:~# pictureframe.sh -a pic-start -d /path/to/pictures

Notes:

• you may place additional PictureFrame2020.py command line options into /home/pi/.pf/PictureFrame2020.cli_opts
• picture frame will be started in the background. Use tail -f /home/pi/.pf/logs/PictureFrame2020.log the check for errors. On rare occasions, check tail -f /home/pi/.pf/logs/PictureFrame2020_mqtt.log.
• see more convenient means to control picture frame in MQTT sections

MQTT Broker

For MQTT to work, you need to connect above MQTT clients to a MQTT message broker. Home Automation software such as Home Assistant, openHAB and others will work but mind the learning curve...

You may want to install the MQTT message broker mosquitto on your RPi using the command sudo apt-get install mosquitto

MQTT Clients

The package pi3d-pictureframe comes with two MQTT clients:

• The one built into PictureFrame2020.py, which is enabled by adding the options --mqtt_server MQTT_SERVER, --mqtt_port MQTT_PORT, --mqtt_login MQTT_LOGIN and --mqtt_password MQTT_PASSWORD to /home/pi/.pf/PictureFrame2020.cli_opts.
• The one provided with mqtt-for-pi3dpf.py. This service allows you to control PictureFrame2020.py and additional components, e.g. Hyperion.

The mqtt-for-pi3dpf.py service can be enabled as follows:

sudo systemctl unmask mqtt-for-pi3dpf.service
sudo systemctl enable mqtt-for-pi3dpf.service
sudo systemctl start  mqtt-for-pi3dpf.service
sudo systemctl status mqtt-for-pi3dpf.service

Note:

• Above systemctl commands need to be executed after reinstalling or upgrading pi3d-pictureframe
• If you wish to always start mqtt-for-pi3dpf.service, execute touch /home/pi/.pf/start.mqtt-for-pi3dpf.service.

mqtt-for-pi3dpf.py subscribes to the following MQTT topics:

• start/stop the displaying of pictures
• start/stop the normal desktop
• show list of
• status and help

Checking log file:

tail -f /home/pi/.pf/logs/mqtt-for-pi3dpf.log

Further Topics

Software

• Configuration Options on a per Picture Folder Basis and more (not done yet)
• Home Assistant Integration (not done yet)
• Image Scrapers (not done yet)

Hardware

• Hyperion, Wake up light
• Presence detection, temperature and humidity measurement, room brightness sensor (not done yet)

Credits

• Wolfgang Männel for getting me started on pi3d pictureframe on his web site
• Thanks for Paddy Gaunt from the pi3d team for writing PictureFrame2020.py