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Weather LCD

Code for my Raspberry Pi Weather LCD. (OS)

This program was made for the 16x2 character LCD from Adafruit (https://www.adafruit.com/product/782), however it shouldn't be difficult to use with other character LCD screens. Raise an issue if you'd like to do so.

Features:

  • Uses data from the NOAA, so no API key is needed.
  • Displays the local weather and conditions.
  • Displays weather alerts (conditions are still displayed if the the alerts don't take up the entire LCD).
  • Weather alerts will cause the color of the LCD to flip red (alert color is customizable)

Installation:


pip install lcdbackpack
pip install timeout-decorator

You'll need to update your udev rules so the program can read the USB device. Run lsusb

admin@alarmpi ~/weather_lcd> lsusb
Bus 001 Device 005: ID 239a:0001  
Bus 001 Device 004: ID 0781:5571 SanDisk Corp. Cruzer Fit
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

In this case my LCD was the first line, so I updated my /etc/udev/rules.d/weather_lcd.rules like so:

ACTION=="add", ATTRS{idVendor}=="239a", ATTRS{idProduct}=="0001", , DRIVERS=="usb", GROUP="lcd", MODE="0775"

Reload the rules: udevadm control --reload-rules

You should now be able to run echo "test" > /dev/serial/by-id/usb-239a_Adafruit_Industries-if00

Open weather_lcd.service and make the WorkingDirectory=,ExecStart=,User=, and Group= variables are correct, then install the service file with:

cp weather_lcd.service /usr/lib/systemd/system/weather_lcd.service

Start and enable the systemd service.

systemctl enable weather_lcd
systemctl start weather_lcd

Notes:


I'm not really sure if I didn't do a good job soldering or what, but I had to use a timeout library. The LCD would freeze/block while connecting after running for 6+ hours.

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Code for my Raspberry Pi weather LCD

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