Hardware

Raspberry Pi preparation

• Get the latest Raspbian image: https://www.raspberrypi.org/downloads/raspbian/

• Copy the downloaded image on a SD Card (min. 8Go).

• Before removing the SD card, activate SSH by adding a file named ssh on boot partition.

• To directly use Wifi connection, edit wpa-supplicant configuration:

$ sudo nano /etc/wpa_supplicant/wpa_supplicant.conf

• After switching on the Raspberry Pi

pi@raspberrypi:~ $ sudo apt-get update
pi@raspberrypi:~ $ sudo apt-get upgrade

• [Optional] Some dependencies need Python 3.6+. Depending on Raspbian version, update Python version if needed.

  Example: Python 3.6.9 installation

pi@raspberrypi:~ $ sudo apt-get install python3-dev libffi-dev libssl-dev
pi@raspberrypi:~ $ wget https://www.python.org/ftp/python/3.6.9/Python-3.6.9.tar.xz
pi@raspberrypi:~ $ tar xJf Python-3.6.9.tar.xz
pi@raspberrypi:~ $ cd Python-3.6.9
pi@raspberrypi:~/Python-3.6.9 $ ./configure
pi@raspberrypi:~/Python-3.6.9 $ make -j4  # -j4 allows to use 4 cores (much faster)
pi@raspberrypi:~/Python-3.6.9 $ sudo make install

Note

The latest Raspbian (Buster) is shipped with 3.7.3. This step can be skipped

• Reboot the Raspberry Pi

• Install InfluxDB

pi@raspberrypi:~ $ curl -sL https://repos.influxdata.com/influxdb.key | sudo apt-key add -
pi@raspberrypi:~ $ echo "deb https://repos.influxdata.com/debian stretch stable" | sudo tee /etc/apt/sources.list.d/influxdb.list
pi@raspberrypi:~ $ sudo apt-get update
pi@raspberrypi:~ $ sudo apt-get install influxdb
pi@raspberrypi:~ $ sudo systemctl enable influxdb
pi@raspberrypi:~ $ sudo systemctl start influxdb

Sensors

• AM2302
  • Description
  • Connection to Raspberry Pi
• PZEM-004T
  • Description
  • Connection to Raspberry Pi

Actuators

• One-channel Relay
  • Description
  • Connection to Raspberry Pi