Record a timelapse and live preview image with sensor data from a Bosch BME280 or BMP280 sensor
- The BME280 costs slightly more and measures: temperature, humidity and air pressure.
- The BMP can only measure temperature and air pressure.
Example HTML output which can be synced to GitHub Pages, an S3 bucket, or served directly from the RPi using inlets
See also: app roadmap
- You'll need a Raspberry Pi Zero W or any other Raspberry Pi.
- An RPi camera connected - any version
- A Bosch BME280 or BMP280 sensor connected to GND, VCC SDL and SCL.
How to connect the sensor over i2c
Using raspi-config
- Set your hostname such as
growpi
- Enable i2c under interfacing options
- Change the password for the
pi
user
Install git, tmux, Python and font pages
sudo apt update -qy && \
sudo apt install -qy python3 \
i2c-tools \
python3-pip \
git \
tmux \
libopenjp2-7 \
libopenjp2-7-dev \
libopenjp2-tools
The
libopenjp2
package is for overlaying text on top of the images.
Clone the repo:
git clone https://github.com/alexellis/growlab
cd growlab/app
Get the roboto font:
curl -sSL https://github.com/googlefonts/roboto/releases/download/v2.138/roboto-unhinted.zip -o roboto.zip
unzip roboto.zip -d roboto
Install Python modules with pip3
:
sudo pip3 install -r requirements.txt
Capture a test image to determine if you need a horizontal or vertical flip or not:
# On the RPi
raspistill -o growlab.jpg
# From your PC:
scp pi@growlab.local:~/growlab.jpg Desktop/
# On a Mac:
open Desktop/growlab.jpg
# On a Linux desktop:
xdg-open Desktop/growlab.jpg
If needed, test again with -vf
or -hf
to flip the image.
Edit the config.json
file if needed and update the flip settings, and width and height to match the file that you got from your test growlab.jpg
image.
{
"images": {
"output_dir": "./images/",
"encoding": "jpeg",
"width": 2592,
"height": 1944,
"image_quality": 70,
"preview_seconds": 1,
"vertical_flip": false,
"horizontal_flip": false,
"interval_seconds": 600
},
"text": {
"colour": {
"red": 255,
"green": 255,
"blue": 255
},
"size": 48
}
}
Capture a test photo and HTML page. You'll see the files generated in the html
folder as image.jpg
and index.html
.
python3 app.py
- If you have no sensors, then run
SENSOR_TYPE=none
- If you have the BMP280, then prefix
SENSOR_TYPE=bmp280
Configure GitHub pages and / or a custom domain using the CNAME approach
Set the folder for serving content to "docs"
Generate an SSH key:
cd growlab/app
mkdir -p .ssh
ssh-keygen -f `pwd`/.ssh/id_rsa
Remove the HTTPS git remote and add a SSH one, changing "alexellis" to your own name.
git remote rm origin
git remote add origin git@github.com:alexellis/growlab.git
Go to the repo settings and add the deploy key and check Allow write access
Now run the sample.sh bash script. Feel free to view its contents to see how it works
cd growlab/app
./sample.sh
You can also put this into a loop to run every 10 minutes:
while [ true ] ; do ./sample.sh && echo "waiting 10 minutes" && sleep 600 ; done
Install the systemd service:
touch /etc/default/growlab
sudo cp growlab.service /etc/systemd/system
sudo systemctl enable growlab
sudo systemctl start growlab