dash_button

A quick-setup set of actions triggered by a dash button

#Installation ##See under "tips" for setting up fixed-ip and wifi connection ##First update system and Raspberry Pi:

sudo apt-get update
sudo apt-get upgrade
sudo rpi-update

##Change password if needed, and use Raspi-Config to update timezone, turn on SSH, and turn-on Remote GPIO:

passwd
sudo raspi-config

##Copy in SSH keys if needed, and set privileges:

mkdir ~/.ssh
chmod 700 ~/.ssh
chmod 600 ~/.ssh/my_key
eval $(ssh-agent -s)
ssh-add ~/.ssh/my_key

##Install required programs:

sudo apt-get install git -y
sudo apt-get install alsa-base alsa-utils -y
sudo apt-get install libpcap-dev -y

And node:

curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -
sudo apt-get install -y nodejs

May need to set headphone output on Raspberry Pi:

amixer cset numid=3 1

And adjust volume:

alsamixer

##Clone repo:

git clone https://github.com/zpeterg/dash_button

##Create a file called secrets.js at the bot root, with contents like:

module.exports = {
    ifttt_key: 'ifttt_key_for_webhook',
    dash1: '19:93:19:39-device-id',
};

##Create files named gapp_commands.json" and "gapp_state.json" outside of project root, both with content:

{}

##Run "npm install" in the gapp, gapp/gapp_react and bot directories, then run this in gapp/gapp_react directory:

npm run build

##Install and start pm2:

sudo npm install pm2 -g
sudo pm2 start ~/dash_button/bot/index.js
sudo pm2 start ~/dash_button/gapp/bin/www
sudo pm2 save
sudo pm2 startup

Tips

Outline

There are three different main sections:

• gapp: Server (sudo npm start to initiate server),
• bot: Looping script that contains most of the brains, translating COMMANDS to STATE and triggering events as this is done (npm start to run script).
• gapp/gapp_react: Client-side React app ("npm start" to run the development server, "npm run build" to compile for server to run).

Updating the key for SSH:

https://help.github.com/articles/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent/

Flushing logs

sudo pm2 flush

Setting Static IP in Rasp Pi, from https://askubuntu.com/questions/530522/setting-a-static-ip-on-ubuntu:

sudo /etc/network/interfaces

And add content like this:

auto wlan0
iface wlan0 inet static
    address 192.168.1.106
    netmask 255.255.255.0
    network 192.168.1.0
    broadcast 192.168.1.255
    gateway 192.168.1.1
    dns-nameservers 192.168.1.1, 8.8.8.8
    wpa-ssid <Your wifi network SSID>
    wpa-psk <Your wifi password>

Setting up Si7021 temperature sensor

https://github.com/skylarstein/si7021-sensor http://console.aws.amazon.com/console/home?region=us-east-1 http://www.pibits.net/code/raspberry-pi-si7021-sensor-example.php And don't forget to turn on the i2c: raspi-config

Auto-mount a USB drive (eg., for music)

Create script under "/etc/init.d/mystartup.sh" like this (though not certain that this will run):

#!/bin/bash
echo "Setting up USB mount"
sleep 5
sudo mount /dev/sda1 /media/usb