Fig Table

A repository with everything involved in the design and engineering of the Fig Table. This includes:

• Server - A Rust HTTP server
• Client - A Node.js CLI tool that you can easily send requests to the table from.
• CAD - 3D model schematics for the outer table design.

Product	Store	Cost
Raspberry Pi 3 B+ w/ PSU	Amazon	$46.99
32 GB Micro SD Card	Amazon	$10.59
Relay Board	Amazon	$7.59
Female to Female GPIO Cables (40)	Amazon	$4.99
DC Power Pigtails (10)	Amazon	$5.28
12V 10A Power Supply	Amazon	$15.47
2x Linear Actuators	Ebay	$94.27
8' x 12" x 1" Plywood	Lowes	$36.98
Wood Glue	Home Depot	$4.47
Gray Stain	Home Depot	$15.54
Wood Satin Lacquer	Home Depot	$10.77
Aluminum 6063 Square Tube 4' x 6" X 6" X .125"	Metal Supermarkets	$60.00
Aluminum 6063 Square Tube 6' x 6" X 3" X .125"	Metal Supermarkets	$45.00
Aluminum 6063 Square Tube 4' x 4" X 4" X .125"	Metal Supermarkets	$26.66
Total	w/o tax	383.94

Security

For security reasons your Pi should be set up with a firewall to only allow for requests from web ports:

sudo apt-get install ufw
ufw allow 80
ufw enable

Server

The application that runs on the Raspberry Pi 3 B+, creates an HTTP server at port 3007 that a client can POST to.

• /api - POST API endpoint, you send the following schema.

type APIRequest = {
  // float that describes direction of the table.
  direction: number
  // milliseconds to perform action
  time: number
}

Compiling

Instructions come from this guide.

# Step 1: Install the C cross toolchain
sudo apt-get install -qq gcc-arm-linux-gnueabihf

# Step 2: Install the cross compiled standard crates
rustup target add armv7-unknown-linux-gnueabihf

# Step 3: Configure cargo for cross compilation
mkdir -p ~/.cargo
cat >>~/.cargo/config <<EOF\n[target.armv7-unknown-linux-gnueabihf]\nlinker = "arm-linux-gnueabihf-gcc"EOF

# Step 4: Build
cargo build --target=armv7-unknown-linux-gnueabihf

Deploying

Wire your Pi as follows:

Physical Pin	Description	Motor Controller
31	GPIO 6	Actuator 1 Up
33	GPIO 13	Actuator 1 Down
35	GPIO 19	Actuator 2 Up
37	GPIO 26	Actuator 2 Down
2	-	5V
39	-	GND

Install Raspian lite, and configure it for your keyboard/country since by default it's set to the UK.

Then cd to the standing desk server distribution.

# Download the server
wget https://github.com/alaingalvan/fig-standing-desk/raw/master/server/dist/fig-table-server

# Configure either iptables or an nginx reverse proxy
sudo iptables -t nat -A OUTPUT -o lo -p tcp --dport 80 -j REDIRECT --to-port 3007

# Run the server as root.
sudo ./fig-table-server

# Create a service that includes the server.
cat >>/etc/init/table-server.conf <<EOF\n exec ~/fig-standing-desk/fig-table-server EOF
sudo ln -s /etc/init/table-server.conf /etc/init.d/table-server
sudo service table-server start

Client

A CLI application that's meant to be installed as a global module on node.

git clone git@github.com:alaingalvan/fig-standing-desk.git
npm i client -g

🍐 fig-table Node.js CLI

Usage:
    fig-table <number>            Move table up by x centimeters
    fig-table [options]

Options:
    -h, --help                    Display this message
    -v, --version                 Print version info and exit
    -c, --config <ip-address>     Configure the app with a unique ip.

CAD

Blender files used to design and CNC the table.