Control LED Based on Brightness Using MQTT Protocol

Setup Instructions

Laptop 1 [MQTT Broker]

• Create the username and password hash file by executing the following command in the mqtt_broker_conf/ folder sh gen_password.sh. You should see a file called client_password.txt has been created.
• From the mqtt_broker_conf/ folder, start the broker on Laptop 1 referencing the supplied .conf file ex: /usr/local/sbin/mosquitto -c mosquitto.conf
• Note the IP address of the broker
• Update the BROKER_ADDR field in properties.json on all the other devices (i.e. piA, piB, piC and logger).
• Note: Do not push the broker ip in the repo if you are using NAT

Laptop 2 [Logger]

• From the code/ folder, run logger software via python3 logger.py
• The full log file with all required results will be written to: logs.csv
• A log file showing only lightStatus changes will be written to: lightStatus.csv

RaspberryPiA

• Connect the required components (Buttons, LED's, Resistors, LDR, Potentiometer and ADC) to RaspberryPi as per the schematics submitted with the assignment.
• Enable SPI and install the paho-mqtt package by executing the following command sh setup.sh

RaspberryPiB

• Connect the required components (Resistors and LED's) to RaspberryPi as per the schematics submitted with the assignment.
• If not already installed, install the required packages using requirements.txt, ex: pip install -r requirements.txt
• From the code/ folder, run piB software via python3 piB.py

RaspberryPiC

• Connect the required components (Buttons, Resistors and LED's) to RaspberryPi as per the schematics submitted with the assignment.
• If not already installed, install the required packages using requirements.txt, ex: pip install -r requirements.txt
• From the code/ folder, run piC software via python3 piC.py