Dávid Széll
Published

IOTA-Enabled UFO Catcher

Rebuilding the game, so you can waste IOTA coins too.

IntermediateFull instructions provided4 hours554
IOTA-Enabled UFO Catcher

Things used in this project

Hardware components

Toy Claw Machine
I bought mine at a local store, but it is similar to this one
×1
Raspberry Pi Zero Wireless
Raspberry Pi Zero Wireless
I used one for the game and one to serve power.
×2
Grove - Relay
Seeed Grove - Relay
×2
LED Panel Mount Indicator, Yellow Green
LED Panel Mount Indicator, Yellow Green
×1
Momentary switch
×1
Resistor 220 ohm
Resistor 220 ohm
×2
5V 2.5A Switching Power Supply
Digilent 5V 2.5A Switching Power Supply
×1

Software apps and online services

Raspbian
Raspberry Pi Raspbian
IOTA Tangle
IOTA Tangle

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)
Solder Wire, Lead Free
Solder Wire, Lead Free

Story

Read more

Schematics

Raspberry controlled Power Switch

Finished schematics

Code

test.py

Python
Code for testing the completed hardware
import RPi.GPIO as GPIO
import time

statusPin = 22
buttonPin = 27
relayPin = 17

coins = 1

GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(relayPin,GPIO.OUT)
GPIO.setup(statusPin,GPIO.OUT)
GPIO.setup(buttonPin,GPIO.IN,pull_up_down=GPIO.PUD_UP)
GPIO.output(statusPin,GPIO.LOW)

while True:
  if coins > 0:
    buttonState = GPIO.input(buttonPin)
    if buttonState == False:
      print "Game-start signal sent"
      GPIO.output(relayPin,GPIO.HIGH)
      time.sleep(1)
      GPIO.output(relayPin,GPIO.LOW)
      coins -= 1
  if coins > 0:
    GPIO.output(statusPin,GPIO.HIGH)
  else:
    GPIO.output(statusPin,GPIO.LOW)

main.py

Python
Code for the UFO-Catcher
import RPi.GPIO as GPIO
import time
import sys
import zmq
from iota import Iota
from iota import Transaction
from iota import TryteString
import json
import threading

context = zmq.Context()
socket = context.socket(zmq.SUB)

statusPin = 22
buttonPin = 27
relayPin = 17

coins = 0

GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(relayPin,GPIO.OUT)
GPIO.setup(statusPin,GPIO.OUT)
GPIO.setup(buttonPin,GPIO.IN,pull_up_down=GPIO.PUD_UP)
GPIO.output(statusPin,GPIO.LOW)

def button_processor():
  global coins
  while True:
    if coins > 0:
      buttonState = GPIO.input(buttonPin)
      if buttonState == False:
        print "Game-start signal sent"
        print "New balance: " + str(coins)
        GPIO.output(relayPin,GPIO.HIGH)
        time.sleep(1)
        GPIO.output(relayPin,GPIO.LOW)
        coins -= 1
    if coins > 0:
      GPIO.output(statusPin,GPIO.HIGH)
    else:
      GPIO.output(statusPin,GPIO.LOW)

def payment_processor():
    seed = 'SEED'
    address = 'SWITCH_ADDRESS'
    p_api = Iota('https://nodes.devnet.iota.org:443', seed)
    while True:
      tx = ProposedTransaction(
        address=Address(address),
        message=TryteString.from_unicode('Power Socket payment.'),
        tag=Tag('POWERSWITCHCOIN'),
        value=1
      )
      time.sleep(60)

tx = api.prepare_transfer(transfers=[tx])

result = api.send_trytes(tx['trytes'], depth=3, min_weight_magnitude=9)

socket.setsockopt(zmq.SUBSCRIBE, b'tx')
socket.connect('tcp://zmq.devnet.iota.org:5556')

x = threading.Thread(target=button_processor)
x.start()
y = threading.Thread(target=payment_processor)
y.start()


while True:
  try:
    topic, data = socket.recv().decode().split(' ', 1)
    if topic == 'tx':
      tx_hash, address, value, obs_tag, ts, index, lastindex, bundle_hash, trunk_hash, branch_hash, received_ts, tag = data.split(' ')
      if address == "ADDRESS" and tag == "IOTACATCHERCOIN999999999999":
          coins += int(value)
          print "Payment received"
          print "New balance: " + str(coins)
  except KeyboardInterrupt:
    print("Stopping now")
    GPIO.output(statusPin,GPIO.LOW)
    GPIO.output(relayPin,GPIO.LOW)
    x.join()
    y.join()
    sys.exit()

requirements.txt

BatchFile
Python requirements
PyOTA==2.0.7
pyzmq==18.0.1

powerswitch.py

Python
Code for power supply
import RPi.GPIO as GPIO
import time
import sys
from iota import Iota
import pprint
import json

relayPin = 17

timeRemaining = 0
lastBalance = 0
seed = 'SEED'
api = Iota('https://nodes.devnet.iota.org:443', seed)

GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(relayPin,GPIO.OUT)

while True:

   if timeRemaining > 0:
      timeRemaining -= 1
      GPIO.output(relayPin,GPIO.HIGH)
    else:
       GPIO.output(relayPin,GPIO.LOW)
    x = api.get_account_data()
    balance = int(x["balance"])
    change = balance - lastBalance
    timeRemaining += change
    time.sleep(60)

Credits

Dávid Széll

Dávid Széll

1 project • 1 follower

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