h1. Aquamaniac Home Control System (AqHCS)

h2.Overview

Home automation/control system consists of multiple parts:
- nodes
  - small PCBs based on AVR microcontrollers
    - AtTiny84
    - AtTiny85
    - AtTiny841
    - AtMega644
  - modular operating system written in AVR assembler
  - driver modules for busses:
    - one-wire bus
    - two-wire-bus
    - SPI bus
  - driver modules for devices/sensors modules:
    - UART
    - 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
    - I2C displays (work-in-progress)
    - SPI displays (work-in-progress)
  - inter-node communication stack using two wires (clock/data)

- 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,
      adding data points, create graphs from aqhome-data)
    - tool to flash firmware for nodes, list nodes
  - aqhome-cgi
    - HTTP service for user interaction with aqgome-data