GrowLabChallenge

Follow the steps with me

Install the operating system

• Flash micro-SD card with Raspberry Pi OS Download the tool

• Copy ssh file into the boot folder of the micro-SD card

• Fill wpa_supplicant.conf.template and rename it to wpa_supplicant.conf (without .template at the end)

• Copy wpa_supplicant.conf to boot folder of the micro-SD card

• Try to launch ping raspberrypi.local from a terminal

• To ssh into your RP zero launch ssh pi@raspberrypi.local

• Trust the RP by answering yes (only needed the first time) and enter the default password: raspberry

• Set up un new password: passwd

Optional: As it won't harm you in any way, feel free to run a little update/upgrade...

sudo apt update
sudo apt upgrade

Install Grow software

• Download it curl -sSL https://get.pimoroni.com/grow | bash

• The program will ask you to confirm wether or not tou want to download the examples (yes) and to reboot (yes)

Useful stuff

• Stoping the service: sudo systemctl stop grow-monitor.service

• Create an alias for service start/stop

alias growstart='sudo systemctl start grow-monitor.service'
alias growstop='sudo systemctl stop grow-monitor.service'

• Edit configuration file:

cd /etc/default
sudo nano grow

• To remove the key-pair when having a fresh install

#change the ip!!!
ssh-keygen -R 192.168.1.20

Camera

• Connect the camera cable

• Activate camera

sudo raspi-config

• select Interface Options then Cameraand activate

• Test the camera with sudo raspistill -o image.jpg

• Transfer the file with scp pi@raspberrypi.local:~/image.jpg Desktop/

Taking pictures

• git clone https://github.com/alexellis/phototimer

mkdir -p ~/image
sudo nano /lib/systemd/system/phototimer.service

• Copy paste the following:

[Unit]
Description=Take pictures every 2hours from 8am to 8pm
After=multi-user.target

[Service]
Type=idle
ExecStart=/usr/bin/python /home/pi/phototimer/take.py 120

[Install]
WantedBy=multi-user.target

• Then change the permissions on the file

sudo chmod 644 /lib/systemd/system/phototimer.service

• And enable the service

sudo systemctl daemon-reload

sudo systemctl enable phototimer.service

• Reboot and watch the service being started

To transfer the files from the Raspberry to your local computer: scp -r pi@192.168.1.20:~/image Desktop/

To generate a timelapse from your pictures: echo $(echo $(find ./Desktop/image/ | sort -V|grep jpg)) | xargs cat | ffmpeg -framerate 10 -f image2pipe -vcodec mjpeg -i - -vcodec libx264 out.mp4

• Example of some parameters for the Grow Hat Mini

channel1: {auto_water: true, dry_point: 27, enabled: true, pump_speed: 0.6, pump_time: 0.7,
  warn_level: 0.3, watering_delay: 60, wet_point: 6.0}
channel2: {auto_water: true, dry_point: 27, enabled: true, pump_speed: 0.6, pump_time: 0.6,
  warn_level: 0.3, watering_delay: 60, wet_point: 6.0}
channel3: {auto_water: true, dry_point: 27, enabled: true, pump_speed: 0.7, pump_time: 0.7,
  warn_level: 0.3, watering_delay: 60, wet_point: 6.0}
general: {alarm_enable: false, alarm_interval: 2}