Aquamaniac Home Control System (AqHCS)

Overview

Home automation/control system consists of multiple parts:

• nodes

  • decentralized, nodes just broadcast measured data over a two-wire communication network (clock/data), addresses are auto-assigned, no prior setup necessary, no central bottleneck or single point of failure
  • node types
    • environmental measuring (temperature, humidty, CO2 and others)
    • motion detection, door/window sensors
    • LED strip controllers
  • small PCBs based on AVR microcontrollers
    • AtTiny84
    • AtTiny85
    • AtTiny841
    • AtMega644
  • modular operating system written in AVR assembler
  • event-driven GUI
  • driver modules for busses:
    • one-wire bus
    • two-wire-bus
    • SPI bus
    • UART
  • driver modules for devices/sensors:
    • DS18b20 sensors for temperature measurement
    • SI7021 sensors for temperature and humidity measurement
    • SGP_30 sensors for air quality measurement
    • ccs811 sensors for air quality measurement
    • SK6812 LED driver
    • I2C displays (work-in-progress)
    • SPI displays (work-in-progress)

• applications

  • aqhome-data
    • TCP data service receiving sensor data
  • aqhome-nodes
    • service receiving sensor data via inter-node bus from nodes and forwarding that data to aqhome-data
  • aqhome-mqttlog
    • service exchanging data between aqhome-data service and a mqtt server
  • aqhome-react
    • service reacting to data received by aqhome-data (home automation service)
  • aqhome-tool
    • tool to manipulate aqhome-data (e.g. edit devices and values, add data points, create graphs from aqhome-data)
    • tool to flash firmware for nodes, list nodes
  • aqhome-cgi
    • HTTP service for user interaction with aqhome-data