Introduction: Weather Candle - Weather and Temperature at a Glance
Using this magic candle, you can tell the current temperature and conditions outside instantly
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Step 1: Color Range 0 to 100*F
Step 2: Flashing RaspberriPi Hard Disk / Install Required Software (Using Ubuntu Linux)
Download "RASPBIAN JESSIE LITE" https://www.raspberrypi.org/downloads/raspbian/
Create your new hard disk for DashboardPI
Insert the microSD to your computer via USB adapter and create the disk image using the dd command
Locate your inserted microSD card via the df -h command, unmount it and create the disk image with the disk copy dd command
$ df -h /dev/sdb1 7.4G 32K 7.4G 1% /media/XXX/1234-5678
$ umount /dev/sdb1
Caution: be sure the command is completely accurate, you can damage other disks with this command
if=location of RASPBIAN JESSIE LITE image file of=location of your microSD card
$ sudo dd bs=4M if=/path/to/raspbian-jessie-lite.img of=/dev/sdb (note: in this case, it's /dev/sdb, /dev/sdb1 was an existing factory partition on the microSD)
Setting up your RaspberriPi
Insert your new microSD card to the raspberrypi and power it on with a monitor connected to the HDMI port
Change your account password for security
sudo passwd pi
Choose: 1 Expand File System
9 Advanced Options
A2 Hostname change it to "WeatherJar"
A4 SSH Enable SSH Server
A7 I2C Enable i2c interface
Enable the English/US Keyboard
sudo nano /etc/default/keyboard
Change the following line: XKBLAYOUT="us"
Reboot PI for Keyboard layout changes / file system resizing to take effect
$ sudo shutdown -r now
Auto-Connect to your WiFi
sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
Add the following lines to have your raspberrypi automatically connect to your home WiFi (if your wireless network is named "linksys" for example, in the following example)
psk="WIRELESS PASSWORD HERE"
Reboot PI to connect to WiFi network
$ sudo shutdown -r now
Now that your PI is finally on the local network, you can login remotely to it via SSH. But first you need to get the IP address it currently has.
$ ifconfig Look for "inet addr: 192.168.XXX.XXX" in the following command's output for your PI's IP Address
Go to another machine and login to your raspberrypi via ssh
$ ssh firstname.lastname@example.org.XXX.XXX
Start Installing required packages
$ sudo apt-get update
$ sudo apt-get upgrade
$ sudo apt-get install memcached vim git python-smbus i2c-tools python-imaging python-smbus build-essential python-dev rpi.gpio python3 python3-pip python-memcache
**Update local timezone settings
$ sudo dpkg-reconfigure tzdata
select your timezone using the interface
Setup the simple directory l command [optional]
add the following line:
alias l='ls -lh'
Fix VIM default syntax highlighting [optional]
sudo vi /etc/vim/vimrc
uncomment the following line:
Install i2c Python Drivers
Install the NeoPixel Driver as follows
sudo apt-get install build-essential python-dev git scons swig
sudo pip3 install --upgrade setuptools
sudo pip3 install rpi_ws281x
sudo python setup.py install
sudo python strandtest.py
Step 3: Supplies Needed
USB WIFI (if not a PiZero W)
Frosted Lamp Shade
Step 4: Building the WeatherJar
Solder the leads to connect the NeoPixel Ring to the Pi, needs 5V, GND and GPIO pin 18 connected
*Note: since we're only using one ring with not ever showing full brightness / bright white colors, we can rely on the power source of the RPi itself. Ordinarily they recommend the 5050 RGB pixesl such as these to have their own power source.
Wiring the Components
Connect the NeoPixel to 5v and GND on the RPi, connect the "in" pin on the NeoPixel ring to GPIO Pin #18
Print the Enclosure
In the 3D-Print/ folder of this project, print the lid and the base of the candle to contain the device.
Step 5: Build the Candle
Using a hot glue gun, glue the pi zero to the bottom of the candle base
Drill a hole to allow for the power USB cable to come in.
I've used some simple tape to hold the NeoPixel Ring to the button of the candle, tucking the wires away to ensure the light is blocked by any strange shadows inside.
Step 6: Creating the Temperature API
Python Flash API for displaying temperatures as color gradients installation instructions
Clone the project webserver folder locally on your webserver from this project [/var/www]
Create the Apache configuration to point to this project (Python Flask API)
Required Packages for Python Flash on Apache
$> sudo apt-get install libapache2-mod-wsgi python-dev python-pip python-pil
$> sudo a2enmod wsgi
$> sudo service apache2 restart
$> pip install flask
Step 7: Setup RPi Cronjob for Candle to Operate
Set pi user crontab
Enter the following line for a minute by minute crontab
$ crontab -e
*/1 * * * * python /home/pi/WeatherJar/weather.py
Set root user crontab (this library requires root access)
Set "on reboot" to run the candle python script forever
$ sudo su
$ crontab -e
@reboot python /home/pi/WeatherJar/candle.py
Step 8: Finished!
Be sure to place this new URL you generated in your project settings so you can now have the weather jar respond to your current outdoor temperatures.
Participated in the
Make it Glow Contest 2018