Home Server

This server provides a simple little REST API that allows you to

• control Ikea Trådfri lights by connecting to a Trådfri gateway
• switch 433 MHz radio controlled power outlets on and off

Requirements

If you want to control Ikea Trådfri lights, you'll need...

• at least one bulb (duh!)
• an Ikea Trådfri gateway, connected to the same network as the computer this software runs on

If you want to control 433 MHz power outlets, you'll need...

• a Raspberry Pi or similar device (something that has GPIO pins)
• a 433 MHz RF transmitter + receiver. e.g.:
  • https://www.amazon.com/dp/B00M2CUALS
  • https://www.amazon.de/dp/B00OLI93IC
• to connect both the transmitter and receiver to said Raspberry Pi, so some jumper wires could come in handy:
  • https://www.amazon.com/dp/B01LZF1ZSZ
  • https://www.amazon.de/dp/B01EV70C78

Installation

(Assuming you're using a Raspberry Pi with a freshly installed Raspbian. Under other circumstances, some steps might be slightly different or even obsolete.)

• install git

  sudo apt install git
  

• install node.js v12.x

  wget https://deb.nodesource.com/setup_12.x
  chmod +x setup_12.x
  sudo ./setup_12.x
  sudo apt install nodejs
  

  For more info see: https://github.com/nodesource/distributions#debinstall

• install WiringPi

  git clone git://git.drogon.net/wiringPi
  cd wiringPi
  ./build
  cd ..
  

  For more info see: https://projects.drogon.net/raspberry-pi/wiringpi/download-and-install/

• clone this repo with its submodules:

  git clone --recursive git@github.com:chrisEff/home-server-nodejs.git
  

• install the dependencies:

  cd home-server-nodejs
  npm i --production
  

• compile RPi_utils

  cd 433Utils/RPi_utils
  make
  cd ../..
  

• adjust config.js according to your needs

• allow node to bind ports < 1024 (dhcp-spy needs to listen on port 67 in order to detect DHCP requests from dash buttons):

  npm run allow-portbind
  

• enable reading DS18B20 temperature sensors via W1 bus:

  sudo su
  echo 'dtoverlay=w1-gpio,gpiopin=4,pullup=on' >> /boot/config.txt
  echo 'w1-gpio pullup=1' >> /etc/modules
  echo 'w1-therm' >> /etc/modules
  reboot
  

  For more info see (german): https://www.kompf.de/weather/pionewiremini.html

• start the server

  npm start
  

Useful links

Tradfri

• home-assistant/core#10252
• https://learn.pimoroni.com/tutorial/sandyj/controlling-ikea-tradfri-lights-from-your-pi

433 Mhz

• https://www.einplatinencomputer.com/raspberry-pi-433-mhz-funksteckdose-schalten/
• https://tutorials-raspberrypi.de/raspberry-pi-funksteckdosen-433-mhz-steuern/

Temperature Sensors

• https://learn.adafruit.com/adafruits-raspberry-pi-lesson-11-ds18b20-temperature-sensing?view=all

coap-client Examples

get PSK

coap-client -m post -u "Client_identity" -k "<KEY_FROM_GATEWAY>" -e '{"9090":""}' "coaps://<GATEWAY_IP>:5684/15011/9063"

get gateway details

coap-client -m get -u "" -k "" "coaps://<GATEWAY_IP>:5684/15011/15012"

get list of device IDs

coap-client -m get -u "" -k "" "coaps://<GATEWAY_IP>:5684/15001"

get list of group IDs

coap-client -m get -u "" -k "" "coaps://<GATEWAY_IP>:5684/15004"

get device infos

coap-client -m get -u "" -k "" "coaps://<GATEWAY_IP>:5684/15001/<DEVICE_ID>"

get group infos

coap-client -m get -u "" -k "" "coaps://<GATEWAY_IP>:5684/15004/<GROUP_ID>"

turn bulb on

coap-client -m put -u "" -k "" -e '{ "3311" : [{ "5850" : 1 }] }' "coaps://<GATEWAY_IP>:5684/15001/<DEVICE_ID>"

turn bulb off

coap-client -m put -u "" -k "" -e '{ "3311" : [{ "5850" : 0 }] }' "coaps://<GATEWAY_IP>:5684/15001/<DEVICE_ID>"

set bulb to warm white

coap-client -m put -u "" -k "" -e '{ "3311" : [{ "5706" : "efd275" }] }' "coaps://<GATEWAY_IP>:5684/15001/<DEVICE_ID>"

rename bulb to "foobar"

coap-client -m put -u "" -k "" -e '{ "9001" : "foobar" }' "coaps://<GATEWAY_IP>:5684/15001/<DEVICE_ID>"