Skip to content

The future of blockchain candy has begun. It's delicious 🍬

License

Notifications You must be signed in to change notification settings

satoshipay/stellar-candy-dispenser

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

19 Commits
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

The Stellar-Powered Candy Dispenser

Set up

git clone [email protected]:satoshipay/stellar-candy-dispenser.git
npm install

Use with node 8, please. The rpi-ws281x-v2 package that controls the LEDs doesn't build on latest node versions.

Deploy

In our case we just launched an SSH server on the Raspberry and added our ~/.ssh/id_rsa.pub to the Raspberry user's ~/.ssh/authorized_keys.

Deployment is then just a simple scp command to copy the files. Not super elegant, but straight forward.

scp -r *.js package* src/ [email protected]:/path/to/deployment/

Run

Run the program in watch mode and on testnet:

sudo npm run dev

Run the program in production and on mainnet:

sudo npm start

Configuration

Create a .env file in the project directory.

ACCOUNT_PUBLIC_KEY_1=G…
ACCOUNT_PUBLIC_KEY_2=G…

TEST_ACCOUNT_PUBLIC_KEY_1=G…
TEST_ACCOUNT_PUBLIC_KEY_2=G…

# Motor config format: <speed>:<duration><alternations>

MOTOR_CONFIG_LEFT=30:2s:1       # This motor config is good for M&Ms
MOTOR_CONFIG_RIGHT=40:4.5s:3    # Pistacios

PRICE_LEFT=5
PRICE_RIGHT=5

Auto-start application on boot

In order to make the application start automatically on every boot, we registered a new service called stellar-candy-dispenser.

  1. Create a new file for the service in the /etc/init.d/ directory and open it (sudo nano /etc/init.d/stellar-candy-dispenser).
  2. Use this and replace the dir and PATH to fit the needs of your local installation.
  3. To register your new service call sudo update-rc.d stellar-candy-dispenser defaults.
  4. Afterwards you can control the service with sudo service stellar-candy-dispenser start/stop/restart/status.

Gotchas

Permission errors on npm install

Try npm install --unsafe-perm.

Runtime pigpio errors

If you run into errors like Can't lock /var/run/pigpio.pid and Error: pigpio error -1 in gpioInitialise; while trying to start the application, make sure that the application is not currently running in background because of the service (as only one instance can run at a time because of the access to pigpio).

Stop the service with sudo service stellar-candy-dispenser stop and check in the service status (sudo service stellar-candy-dispenser status) that no other processes are listed in CGroup. If processes are still running after you stopped the service you can kill them manually with kill 'pid'.

License

MIT

About

The future of blockchain candy has begun. It's delicious 🍬

Resources

License

Stars

Watchers

Forks

Releases

No releases published

Packages

No packages published