Use the Github project https://github.com/RPi-Distro/pi-gen to generate a proper Raspberry Pi image. I'm in Germay so I set the keyboard etc. accordingly.
Therefore create a config file like this:
IMG_NAME='Raspbian'
TARGET_HOSTNAME='nodered'
KEYBOARD_LAYOUT='Deutsch'
TIMEZONE_DEFAULT='Europe/Berlin'
WPA_ESSID='Wifi-Name'
WPA_PASSWORD='Wifi-Password'
WPA_COUNTRY='DE'
ENABLE_SSH=1
STAGE_LIST='stage0 stage1 stage2'
It installs a somewhat minimal version of Raspberry OS having Wifi and SSH enabled and configured.
NOTE: for the Raspberry Pi 4 model with 5 GHz wifi, the wifi is disabled per default.
There is a PR open as of 2020-09-01 that fixes the issue. Until it is merged, you can grab the changes like so:
# if already cloned, ensure your on the current master
git clone https://github.com/RPi-Distro/pi-gen.git
cd pi-gen
git fetch origin pull/416/head:wifi-fix
git checkout wifi-fix
Then run the image creation with ./build-docker.sh. It will take a while.
If it fails (it certainly does on my system), just rerun with CONTINUE=1 ./build-docker.sh.
If it was successfull, write the image (it is in the deploy folder) to the SD card. Use the Raspberry Pi Imager for that: https://www.raspberrypi.org/downloads/.
Start the Pi and connect via SSH.
Set a new password for the pi user: passwd.
Install git to be able to clone the repo: sudo apt install -y git.
Clone the repo git clone https://github.com/dArignac/smarthome.git.
Run setup.sh. It should complete without any error and shows that docker is running.
Log out and log in again to have the group change reflected on the current user.
An external hard disk is used to store all the data, as writing it to the Raspberry's SD card will decrease its lifespan.
Ensure it has etx4 file system. Plug it in. Ensure it can be found with sudo lsblk -o UUID,NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL,MODEL.
If found, create a new mount folder (of course you can name it different): sudo mkdir /mnt/pi1
With sudo blkid check the path of the disk and mount it accordingly: sudo mount /dev/sda1 /mnt/pi1
Grab the partition UUID PARTUUID with sudo blkid.
Edit fstab (sudo nano /etc/fstab) and add the line (replace the PARTUUID with the partition id):
PARTUUID=14ec74ef-01 /mnt/pi1 ext4 defaults,auto,users,rw,nofail 0 0
Grep the id of your user and of the docker group.
$ id $USER
uid=1000(pi) gid=1000(pi) groups=1000(pi),4(adm),20(dialout),24(cdrom),27(sudo),29(audio),44(video),46(plugdev),60(games),100(users),105(input),109(netdev),999(spi),998(i2c),997(gpio),995(docker)
Create the folders and set the permissions:
sudo mkdir -p /mnt/pi1/nodered /mnt/pi1/influxdb /mnt/pi1/grafana
sudo chown 1000:995 -R /mnt/pi1/mosquitto /mnt/pi1/nodered /mnt/pi1/influxdb /mnt/pi1/grafana
Attach in USB port and check if recognized: lsusb.
It should be something like Future Technology Devices International, Ltd FT232 Serial (UART) IC.
Check dmesg to find where it was mounted: dmesg | grep tty
Should print something like that: [ 303.711275] usb 1-1.4: FTDI USB Serial Device converter now attached to ttyUSB0.
Check that /dev/ttyUSB0 exists.
Check the id of dialout group and adjust docker-compose.yaml at the nodered service ( group_add) if the id is not 20.
Download Arduino IDE.
Load the LaCrosseITPlusReader10 sketch from the jeelink folder in the IDE. You may need to put it to /home/<user>/Arduino. Compile it and upload it to the JeeLink.
The sketch was provided by the FHEM project, you can grab it here. I adjusted that the blue LED is permanently off because it annoys me.
I had issue with writing to the JeeLink, though my user belongs to the dialout group. The crude workaround was to run the Arduino IDE as root ¯\(ツ)/¯
As everything runs in Docker but we want to gather the health data of the Raspberry Pi that runs all the services, we need to publish the data via MQTT and then handle in nodered.
There we use a small script that gathers all the information and publishes them to the MQTT topic via cronjob every minute. The script is automatically installed in the crontab.