The Intelligent Warehouse System aims to be a scaleable solution for giving an overview of the stock in a warehouse. It supports especially small goods with high quantities (e.g. screws). The system uses scales to determine the weight of these small goods in boxes and provides useful information via a dashboard to users. It also consists of LEDs to indicate the stock of each good directly in the warehouse to get a quick overview or easily find wares which need to be restocked.

The system consists of several Raspberry Pi Zero which are linked together over a network. The Raspberry Pis are split into two roles:

• Central node: Consisting of one Raspberry Pi controling the Dashboard and the whole infrastructure.
• Shelf Nodes: Consisting of Raspberry Pis that collect weight data and controll the LEDs.

using the OneM2M standard.

• Raspberry Pi Zero WH (WiFi and Header Pins) * 3
• Transcend TS16GUSD300S-A 16GB microSDHC * 3
• AZ-Delivery KY-016 FZ0455 3-colors RGB LED module * 4
• DollaTek Small Scale 10 kg Load Cell with HX711 A/D * 4
• Power Supply 5V 1A (or better) * 3
• Additional Female to Female Jumper Wire

• Raspberry Pi OS Lite 32 bit
• Docker (docker.io and docker-compose)
• ACME oneM2M CSE: https://github.com/ankraft/ACME-oneM2M-CSE
• Node-RED w/ node-red-dashboard
• HX711 python library: https://github.com/gandalf15/HX711
• avahi-utils

As the Operating System Raspberry Pi OS Lite 32 bit is used. This OS can be downloaded and flashed onto a microSD card with the Raspberry Pi Imager utility.

• hostname: acme-in, acme-regal-1 or acme-regal-2
• enable ssh
• username acme
• password acme
• setup your WiFi (don't forget the WiFi country) or connect with an Ethernet adpater
• setting the keyboard language is usefull if you need to connect a keyboard via USB

sudo apt update

sudo apt upgrade

sudo apt install git

• Create Troken for your git account: https://github.com/settings/tokens (give the token a name, set an expiration date and select the scope "repo")
• Clone with this command (replace <your_token> with your new token):

git clone https://<your_token>@github.com/io22m007/AID

tell git that the directory is a save directory

git config --global --add safe.directory /home/acme/AID

install docker:

sudo apt install docker.io docker-compose

add current user to docker group:

sudo usermod -aG docker $USER

enable docker at startup:

sudo systemctl enable --now docker

restart system:

sudo shutdown -r now

Install python3 pip natively:

sudo apt install python3-pip 

Install the HX711 library natively:

sudo rm /usr/lib/python3.11/EXTERNALLY-MANAGED
pip3 install 'git+https://github.com/gandalf15/HX711.git#egg=HX711&subdirectory=HX711_Python3'

To calibrate the scale you need to run the scale-calibrate.py python app. This app can be found in the Tools folder.

python /AID/Tools/scale-calibrate.py

You'll need an object of which you know the exact weight.

Follow the instructions in the python app and copy the config string into the ae.ini file. This file can be found here:

• /AID/Docker/Regal-1/ae/ae.ini
• /AID/Docker/Regal-2/ae/ae.ini

switch to one of these folders:

• /AID/Docker/Infra
• /AID/Docker/Regal-1
• /AID/Docker/Regal-2 start docker container:

docker-compose up --build

start docker container in the background:

docker-compose up --build -d

a list of helpful commands can be found here