e-curtain

 Minimalistic IoT on Raspberry Pi, C++, Matlab/Simulink, Rust, JavaScript.

Features

• Everything is DIY
• Automatic bedroom temperature control for optimal sleep quality
• Automatic room ventilation for optimal air quality
• Automatic weather information retrival
• Automatic room temperature measurement
• Automatic curtain control
• Automatic window control
• Automatic AC cooling/heating/ventilating/off mode selection
• Automatic duct gate (cut-off) control
• Automatic fan control (on/off)
• Automatic space heater control using IR
• Keyfobs for easy global mode selection
• Web-based dashboard for monitoring

Hardware requirement

• Raspberry Pi Zero W (x3)
• I2C-based temperature sensor
• Continuous rotation servo
  • For curtain control
• Stepper with controller
  • For window control
• Servo (x4)
  • For AC mode selection (x2)
  • For duct gate control (x2)
• Relay
  • For fan control
• IR transmitter
  • For space heater remote control
• Photoresistor
  • For space heater control feedback
• RF keyfob(s) with receiver
  • For global mode selection
• Other stuff (electrical)
  • Power adapters (x3)
  • Resistors, capacitors, transistors
  • Breadboards
  • Jump wires
  • Headers
• Other stuff (mechanical)
  • AC unit
  • Space heater
  • Curtain with pulleys
  • Duct gate (x2)
  • Lead screw, copper nut, shaft coupler
  • Screws, washers, nuts
  • Duct tapes
• Auxilliary tools
  • Oscilloscope and probes
  • RF receiver
  • Glue gun
  • Screw driver
  • Power drill

Layout

• HOST0: The central controller, running F-G0
  • Servo x4
  • RF receiver
• HOST1: The bedroom controller, running H1-G1
  • Temperature sensor
  • Continuous rotation servo
  • Stepper with controller
  • Relay
  • IR transmitter
  • Photoresistor
• HOST2: The living room controller, running H2 and H0-C
  • Temperature sensor

Hardware setup

Read the source code and you will figure out.

Software setup

You need cmake, make, ssh, bash, node/npm, rustc/cargo

Prepare cross-compile toolchain

1. On a Linux machine, install crosstools-ng

2. Get the source code:

   git clone --depth=1 https://github.com/b1f6c1c4/e-curtain.git
   cd e-curtain

3. Run the following:

   cd ct-ng
   ct-ng build.128 # Depends on how many cores you have

Prepare toolchain for rust

sudo systemctl start docker
cargo install cross

MATLAB Simulink code generation

You simply generate script/libdumbac.slx and put the result in a folder called libdumbac. You may need licences for doing this.

We also need you know your MATLAB installation, so run the following:

ln -s /opt/MATLAB/R2020a matlab

Compile

make build -j128 # Depends on how many cores you have

Deploy

make HOST0=192.168.x.x HOST1=192.168.x.x HOST2=192.168.x.x deploy

You need to put weather API key into $HOST2:/etc/e-curtain/weather.json.

Data log are written to $HOST2:/var/log/e-curtain.bin.

We are also utilizing $HOST2:/var/lib/e-curtain/ for persistent storage.

from https://github.com/b1f6c1c4/e-curtain